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  • Galaxy Express 999 franchise:
    • 1979 film:
      • Count Mecha is the nemesis of young Tetsuro Hoshino. Once a man who accepted mechanization, Count Mecha decides to fill his days with hunting to alleviate boredom. His chosen prey is human beings. Mecha hunts down and slaughters countless innocents on his private world, including Tetsuro's mother, before taking them and mounting their remains as obscene trophies. When Tetsuro arrives, Mecha only sneers that he's killed too many mothers to remember them all and tries to murder the boy as well.
      • Queen Promethium, the mother of the heroine Maetel, condemned her world La Metal to mechanization and tried to murder Maetel's father when he attempted to oppose her. Running La Metal as a horrific dystopia, Promethium has people abducted and made into living machines to serve in perpetual agony as the power source of La Metal, having forced Maetel into a machine body so Maetel will gather victims for that purpose. When Maetel reveals her true plans against her evil mother, Promethium attempts to murder Tetsuro herself to deny Maetel any sense of victory.
    • Maetel Legend: Lord Hardgear is a Mad Scientist who wants to encase all of humanity in machine bodies that he can brainwash and control. Convincing the Queen of his planet to undergo the mechanization process, Hardgear has her order her subjects to do the same and threatens to kill those who refuse. During the mechanization process itself, the soul is separated from the body, which Hardgear liquefies and drinks. While fighting the Queen's daughters, Hardgear sends mechanized versions of their friends to attack them, relishing in exercising control over their former comrades.
  • Gamaran:
    • Ryuugo Daimaru, heir of the Daimaru, is obsessed with the ascendance of the family, or more accurately himself. To that end, Ryugo has cultivated the talent of his mentally unhinged younger brother Sakon who is known as the strongest in the school's history. When Sakon was young, Ryugo threw him into a basement with multiple other prisoners with the promise only one man would be allowed to leave after the others were dead. When a berserk Sakon emerged, Ryugo directed him to kill their father who he determined as worthless. Ryugo uses Sakon's violent side to destroy all those who stand in his way and when Gamaran fights Sakon, Ryugo rants how Sakon isn't allowed to lose because of how perfect Ryugo made him.
    • Jinsuke Kurogane is the mightiest sword in the world and the most wicked. Jinsuke joined the Ogame School, only to later give its leaders the ultimatum of joining with him to conquer the world or die if they refused. When they showed their reluctance, Jinsuke slaughtered the school with his followers, including the friends of his son Gama, in front of Gama's eyes, before defeating Gama as well and only sparing him on a whim. Jinsuke shows no hesitance in an attempt to kill Gama later and no remorse in killing his own students should he decide to. He manipulates the Washitzu clan by holding the mother of its new Daimyo captive with her life on the line and builds a power base where he plans to create a world where he, the strongest rules, and any who oppose him fall to his sword. In the end, when asked if he has any regrets, he declares he has not even one.
    • Mario Kujo, initially Jinsuke's right hand man, is in reality a spy for the Shogunate. Kujo aided Jinsuke in the slaughter of the Ogame School, not for the sake of his sword skills but for his eventual political power. To that end, Kujo has no compunction destroying sword schools and anyone else while also betraying his own Muho School to be exterminated by the Shogunate. He also, unlike nearly every other fighter, has no compunction cheating in his fights by having guards ambush his victims. In a series defined by honor in battle, Kujo sticks out by having none and viewing all around him as nothing more than stepping stones to his rise to glory. Even his initial stoicism is an act as he displays nothing more than glee at killing the brother of one opponent in front of him.
  • Gangsta.: The vicious mobster Ivan Glaziev is the man who leads the purge of the persecuted Twilights- those who have enhanced abilities, handicaps and shortened lifespans thanks to the Fantastic Drug Celebre. Glaziev is seen having Twilights butchered, tortured and killed with his attacks not sparing innocent civilians or even children. One Twilight is blackmailed into attacking one of the only safe havens for the Twilights by Glaziev holding his wife and daughter hostage. When the man is dying, Glaziev cheerfully informs him that he had already killed the two by chopping their limbs off and throwing them away. Possibly Glaziev's worst act is keeping the Twilight Erika as his personal hitwoman, having conditioned her with years of mental and sexual abuse. When he reveals this to Erika's long-lost brother Delico, Glaziev says it gave him a genuine thrill to rape her every evening, knowing she had the face of the brother who always greeted Glaziev so politely.
  • Gargantia on the Verdurous Planet: Aleria from the second OVA is, in short, the Big Sister Bully taken to the max and then some. She cares for absolutely nothing but complete social, political, and religious control of her father's fleet and will do anything to get what she wants. When her youngest sister Linaria inherits her father's fleet and converts to a sky-based religion (implied to be a means of escaping Aleria), Aleria orders her other two sisters to hunt down her freighter and kill everyone on board. By the time Kugel arrived, only Linaria remained because of Aleria's relentless attack. She later intentionally lures the Hideauze onto the fleet by setting off mines on the seabed in order to publicly shame Kugel and leave the fleet up for grabs. Finally, after both attempts fail, she finds out that Linaria died. Hearing this, she smirks at her own sister's death and tries to usurp the vacant position as high priestess in order to become the leader of the fleet. Villains this bad are very hard to come by in this series, but Aleria takes the cake as the vilest of the bunch.
  • GARO: The Animation: Priest Mendoza is the mastermind behind the misfortunes befalling the kingdom of Valiante. A former Alchemist of the Makai Order, Mendoza was expelled from the Order for sacrificing humans to enable himself to control the monsters known as Horrors. After marrying, Mendoza's child was born with the same curse the Order had placed on him, and in response, Mendoza murdered both his wife and baby, swearing vengeance on the Makai Order in the process. Using the Horrors to murder numerous innocents, Mendoza blames the Horrors' appearance on the heroic Makai Knights, who are forbidden from taking human life, and, under this pretense, leads purges against the knights resulting in them being tortured, killed, or, in the cases of the Priestesses, raped, while Mendoza has one of the most powerful members burned at the stake in public view. When confronted by León Luis, Mendoza mentally forces him to relieve his own mother's burning at the stake, causing the boy to go on a rampage that decimates a nearby village. Having survived his near-death, Mendoza uses the tormented souls of hundreds of Makai Knights and Alchemists to summon an ancient Horror that, after consuming numerous innocents, Mendoza uses to give himself incredible power, at which point he proclaims himself the new god of humanity. Spiteful, cruel, egotistical and petty, Mendoza aimed at nothing less than utter domination and destruction to avenge his wounded pride.
  • Gasaraki:
    • Kazukiyo Gowa is the eldest son from the Gowa family. He assassinates a minister of justice in what looks like a tragic road accident to enhance his own power, and has soldiers injected with a serum to mutate and drive them insane, forcing them to pilot mecha for 36 hours straight in life-threatening situations while providing assistance to a coup that could throw Japan into chaos. Kazukiyo uses his own little sister Misuzu in an experiment due to her powers as a kai, murdering his own father to obtain further power while attempting to throw Japan into chaos and war so he may rise to the top.
    • Tsuna Watanabe, Kazukiyo's ancient predecessor, was a power-hungry warlord. Leading a campaign to seize control of Japan, resulting in massive casualties, Watanabe summons the Gasaraki firestorm to immolate the city of Kyoto. When the hero Yushiro refuses to allow this, Watanabe has him tortured by having arrows shot into his knees.
  • Gate: Zorzal El Caesar, Crown Prince of the Empire, embodies the worst traits of his culture. Introduced violently raping the demi-human Queen Tyuule of the warrior rabbits, it is revealed Zorzal led the conquest and massacre of her people. When Tyuule pledged herself to be his slave to spare them, Zorzal accepted before having her people butchered anyways while lying to them how she sold them out to save her own life. Zorzal leads a raid on Ginza that takes Japanese people as slaves, keeping a young woman named Noriko as a Sex Slave which infuriates the JSDF enough into brutalizing him while not even his own father twitches a finger to protect him. With an insatiable ego, Zorzal even furiously threatens to destroy Japan and thinks how he will murder his own family and people for not acknowledging his greatness. In the light novel, he boasts about how he not only betrayed his word regarding the Warrior Bunnies, but even admits that he wanted Tyuule discover this, hoping to drive her into a rage where she'd attack him so he could have the pleasure of beating her down. When he finds out that she's far too smart for that and tried to lead him into a trap of his own making, he flies into a rage and beat several of his slaves to death, including his sex slaves, and plans to punish Tyuule for it, by having her gang-raped.
  • Gdleen OVA: The godly figure known as the "Governor" is actually a supercomputer known as Husnet, who has kept control of Gdleen for centuries manipulating countless wars among the primitive tribes and keeping them technologically stagnant so they never rise up. Demanding constant sacrifice of innocents—which it keeps in permanent suspended animation to harness information from them—Husner has the savage Barbaress tribe massacre an entire neutral city simply for the purposes of wiping out their hated enemies the Miyori tribe. When finally confronted by Ryu, Husner offers to let Ryu go only if he gives up his love interest Fana, cruelly dismissing all the lives it's thrown away for the sake of its god complex.
  • GeGeGe no Kitarō (2018 anime):
    • Backbeard is the wicked ruler of the western Yōkai. A monstrous tyrant who intends to complete the Brigadoon and convert humanity to his zombified Yokai slaves, Backbeard exterminates the Hantu of Malay for not submitting to him, attacking Gegege Forest to massacre the Japanese Yokai within, and sends his servants to cause chaos throughout Japan. Also attempting to force the young witch Agnes to sacrifice herself, Backbeard had forced her mother to do the same to protect her and her sister Adele, who Backbeard likewise is fine with sacrificing to complete the Brigadoon. Backbeard shows no regard for any collateral damage, trying to kill Kitaro's young human friend Mana, gloating that nothing matters but submission to him.
    • Tamamo-no-Mae, the Nine-Tailed Fox, is the last, and worst, of the Four Traitorous Yokai Generals and the one who massacred the Kidoshu village, leaving only one survivor. Escaping the underworld, Tamamo-no-Mae overflows it with souls to empower herself, using her doubles to seduce world leaders so she may start a war between Japan and another nation to flood the netherworld with even more souls for power until she unleashes them on Earth, gloating how she will destroy both worlds in her quest for power.
  • Geneshaft has these two murderous military leaders:
    • Lord Sergei the 4th Sneak is the secret leader of the terrorists and the alien AI Oberon's partner. A man with perfect DNA who became a respected commander, Sneak secretly hates humanity for not being perfect like himself. Teaming up with Oberon and aiding it in destroying several cities full of people, Sneak aims to Kill All Humans and replace them with a "perfect" new race. To do this, he feigns loyalty to the government while leading the rebel terrorists with false promises of restoring the natural order for humans. Manipulating everyone around him to achieve his goal, Sneak abuses Beatrice, strings Mir Lotus along using her feelings for him, sends several other subordinates and terrorists to their deaths, and kills Remmy Levistrauss when she rebels against him after learning his true plans. Finally, he attempts to kill the Strain crew heroines, forcing Sophia Galgalim to sacrifice herself to stop him.
    • Captain Jean Gedoo/Gedoux is the psychotic antagonist of episodes 9 and 10. A top student who resented being always second best to Mario Musicanova, Jean boards the ISEA fleet sent to capture the Shaft crew with the intent on getting his revenge on Mario. He is introduced beating his Register and later ordering her to hack into the computer and destroy the Shaft, physically and verbally abusing her into compliance. After managing to get over half the fleet vaporized instead, including his boss—and Mario's friend—General Natalie, Jean blames his Register and beats her before deciding to make himself the new commander. Gloating to Mario about usurping Natalie, Jean engages his rival, shooting him, and takes Mario's Heroic Sacrifice to kill them both with glee at his hated foe dying with him.
  • Genma Wars:
  • Genocyber:
    • Original manga: Garnes Back is the development division manager of Tron Dynamic Corp. Seeking to use Professor Morgan's psychic teenage daughters Elaine and Diana for his own purposes, Garnes has his men sneak into Morgan's laboratory to kidnap him and his daughters, killing three guards in the process. Forcing Morgan to collaborate with him by threatening to either gun him down or kill his daughters first, Garnes allows Professor Kenneth Reed to painfully experiment on Elaine in order to awaken her Psychic Powers.
    • Anime:
      • Dr. Kenneth Reed, even worse than his manga counterpart, was an amoral research assistant to Dr. Nguyen Morgan. Arranging for Morgan and his wife to die, Kenneth takes their super-powered daughters for his own research. When a detective helping the girls hides them in a hospital, Kenneth and his goons slaughter the entire building, gruesomely eviscerating the detective. Even as he dies, Kenneth watches with glee as the girls merge into the titular Genocyber, destroying Hong Kong and killing millions in the process.
      • Mayor Grimson Rockwell is the corrupt, smug leader of the City of the Grand Ark, using his influence to cruelly keep most of the citizens as abused, starving slave labor while his upper class elite throw hedonistic parties, engaging in torture and trafficking of lower class civilians. When a large group of people try to rebel against Rockwell, he orders them massacred and thrown into mass graves before executing his own security chief for moving too slow in carrying out the exterminations. Rockwell's greatest act of villainy comes when he learns of a church taking in orphaned children and spreading the word of God and, declaring them to be a threat to his rule, has them all slaughtered in machine gunfire, leading to dozens of defenseless men, women and orphan children being killed where they stand in the church.
  • Getter Robo: Through the years and universes, both the original pilots, their successors and their counterparts have faced enemies whose ambition and sheer cruelty have led to countless suffering.
    • Getter Robo Saga (Original manga continuity by Ken Ishikawa)
      • Emperor B(u)rai of the Hundred Demons Empire started as an unknown scientist who became a threat to the world after finding a ship from the Andromeda Country that turned him into a "demon" to defeat the Getter Robo. Building his army and taking advantage of the invasion of the Dinosaur Empire, the Hundred Demons Empire turns humans into brainwashed demons that are sent to their deaths in a war that ends with the humiliating death of Emperor Gore. In Getter Robo G, the Hyakki Empire turns delinquents such as Hayato's cousin into brainwashed cyborgs; stages a massacre in a building with the intention of using poison gas; attempts an alien invasion; and tries to use a deadly bioweapon. When the Getter Team fights Uzhara, a powerful robot from Atlantis, Brai takes advantage of their temporal absence, sends a small squad to kill the surviving Atlanteans and launches a brutal invasion of Japan where the Hyakki Army burns cities and captures and chains the survivors, taking them as hostages. Saved by the Andromeda Country and turned into a monstrous cyborg to help their attempts to destroy humanity after his defeat, Brai returns in Shin Getter Robo to destroy the Saotome Institute.
      • Getter Robo Go: Professor Alrich zu Lando/Rando is an Evil Overlord whose mission is to Take Over the World. Starting as a scientist working in a joint project in the Arctic known as the Vega Zone, Lando takes control by brainwashing the scientists to turn them into cyborgs. Years later, Lando starts his war of conquest with mass murder, attacking Canadian and American soldiers. Determined to obtain the Getter Robo Go from Japan, Lando has no compunction using nuclear weapons on a Japanese city and threatening more attacks and the killing of as many people as necessary, all borne out of his desire to rule the world.
    • Alternate Continuity series:
      • Getter Robo Hien: The Earth Suicide, by Naoto Tsushima: Professor Jakob is a misanthropic madman with a desire to destroy humanity. Once a scientist working with methods to heal people using special plants, Jakob became obsessed with the idea of destroying humanity using plants infused with Getter Rays, which he considered the real life form chosen for the Getter. Creating special seeds, Jakob personally infects the master of Goki Hagane and the father of Tsurugi Ryuki, turning them into monsters who murder every human near to them while being painfully aware of their actions, leading to the destruction of Tsurugi's natal city. Jakob also betrays his partner by infecting his wife in front of him before Jakob's son kills him in front of Dan Amakusa, his partner's son. Fusing himself with the "Great Will", Jakob attacks the capitals of multiple countries and their armies with Plant Beasts, leading to the painful deaths of many soldiers and civilians. Managing to steal a Getter Core, Jakob uses it to create a giant plant capable of destroying humanity and when the Getter Team confronts him, Jakob thanks them for reminding him about his victims and mocks the deaths of their loved ones, referring to them as "worthless vermin".
      • Apocrypha Getter Robo Darkness (originally Aprocrypha Getter Robo Dash), by Hideaki Nishikawa: While most Ideas are ruthless murderers, Lord Ionus is one of the worst. The self-proclaimed genius of the Getter of Light, Ionus uses the submarine ship La Mu to destroy several cities in order to create a world dominated by the strongest. During his massacres, Ionus kidnaps millions of women that he finds attractive and uses them in experiments. He murders and mutilates them to create either pets made of women's torsos or beautiful but soulless servants, while using the remains to create deformed yet sapient creatures that he abandons in the wilderness inside La Mu for his own amusement. Creating his "masterpiece", Ionus "marries" her before throwing her into the wilderness after she insults him. When the "Remains" take care of his masterpiece, naming her "Musashi", and try to make her escape La Mu, Lord Ionus decides to murder her to create a replacement and kills the Remains while mocking their love for Musashi. He then decides to activate the self destruction mechanism of La Mu, being willing to sacrifice the lives of loyal servants just to hurt Musashi while being unable to understand why she would be disgusted at him.
  • Ghost Hunt: The anime version of Kaneyuki "Urado" Miyama was a sickly man trying to extend his life in the worst way. Changing his name to "Urado" after Vlad the Impaler, he began to abducts countless innocents, cutting their throats to bleed them out and bathe in their blood. After his death, his ghost continues haunting his old home, abducting those who investigate or wander inside to murder them for their blood as well. When the heroes arrive with other paranormal investigators, Urado wastes no time in abducting and murdering several of the investigators before trying to murder the heroine.
  • Ghost in the Shell: Stand Alone Complex: Kazundo Gōda, 2nd Gig's Big Bad, is the scarred, pitiless and self-embiggening director of the Cabinet Intelligence Service who callously exposes workers to an irradiated environment and covers up his crimes with strings of murder. Infecting Japan's postwar refugees with the cyberbrain "Individual Eleven" virus, Gōda raises tensions as the infected are willed to carry out terrorist attacks, believing they are acting of their own volition. As tensions rise, and Gōda's actions lead to the emergence of a "hero" who goes rogue and seeks to arm the embattled refugees with plutonium, Gōda manipulates events such that the hero's attempts to empower the refugees will fail, leaving them powerless in the face of a potential genocide. Ultimately seeking to restructure society to his own liking regardless of how many deaths are caused, Gōda's reprehensible nature is sealed by his only motivation being to take credit for the atrocity to allow himself a sense of importance.
  • Ghost Stories: In the original version of the series, Yamime, from episode 15, "The Devil's Spell", is a demonic entity masquerading as a schoolgirl named Shinobu Matsuba. Years earlier, Yamime consumed the real Shinobu to use her body as a vessel, and is introduced slaughtering another girl offscreen in the opening sequence. In her human guise, Yamime tricks Satsuki and three other girls into performing a "wish-granting" ritual that will let her prey on them while they sleep, and when they try to back out, a counterspell that would erase them from existence. When Amanojaku stops Satsuki from performing the spell, Yamime comes after her in her true monstrous form, gleefully intending to eat her. A smug, sadistic predator behind her cheerful, easy-going demeanor, Yamime disgusted even Amanojaku, a monstrous demon himself.
  • Ginga Densetsu Weed: Shōgun from the manga, the (literally) Ax-Crazy ruler of the monkeys and apes, is a vicious tyrant who will kill anyone and anything that gets in his way, or even if it's simply in the area to vent frustration on. However, what sets Shogun apart are his eating habits. When he's hungry, he just wrenches a baby out of the arms of its mother and takes it to his private lair to devour. He particularly enjoys drinking a mix of puppy blood and liquor.
  • The Girl In Twilight's "The Magnificent Five. Or Eleven" & "The Hero in Me": Judge Hiishi is a judge from the Wild West Fragment that Asuka Tsuchimiya and her companions visited. Introduced by hosting a gladiatorial duel of two people in a land dispute, it was revealed that she forces a duel in order to settle civil disputes, resulting in countless deaths. When Asuka and her companions robbed a bank and got captured, the Judge then gave them several unfair punishments such as working in mines for dozens of years, extending their punishment when Asuka and her companions protested the rule. It was revealed that she conspired together with the local Sheriff in order to capture several bounty hunters and fugitives in order to pit them against each other in order to gain more power and support from the citizens, and will use said power in order to let the Twilight swallow the Wild West Fragment.
  • Goblin Slayer: The Dark Elf is a member of the Evil Sect who has women butchered and vivisected as sacrifices while leading goblins in the sewers of Water Town to cause as much havoc as he can. Having manipulated numerous attacks, the Dark Elf helps to inspire previous assaults by the goblins, including the Goblin Lord's attempted razing of Goblin Slayer's town. Later resurfacing during the Harvest Festival arc, the Dark Elf intends to use his goblins to massacre and violate all in their path while he summons Hecatoncheir, the hundred-armed giant, to obliterate the rest, and goes on a rampage to throw the world into chaos and devastation, intending on summoning many more monsters to kill as many people as possible.
  • Godzilla: City on the Edge of Battle: Mulu-elu Galu-gu is a Bilusaludo who, exploiting Earth's desire for a weapon to combat Godzilla, created Mechagodzilla, while intending to turn it against humanity once it disposes of Godzilla. However, he was forced to leave Earth before he can enact on that plan, leaving Mechagodzilla unchecked as it kills off numerous lifeforms still living on Earth, humans included. Finding Mechagodzilla once more, Mulu-elu tricks Haruo Sakaki and his soldiers into infecting themselves with Mechagodzilla's nanometal in an attempt to defeat Godzilla. When they learn of Mulu-elu's plans to assimilate the entire Earth in nanometal afterwards, killing all life in the process, Mulu-elu would use the nanometal to painfully subject them into submission, leaving Haruo's Love Interest, Yuko Tani, in a permanent coma. Proud of being called a monster for his self-appointed superiority and omnicidal designs, Mulu-elu Galu-gu was the most evil being in a world of monsters.
  • Goku: Midnight Eye: Seemingly an upstanding businessman, Genji Hakuryu is really a ruthless Arms Dealer who uses a psychic woman to hypnotize any detectives trailing him into committing suicide. Eventually killing all seven detectives the police have trailing him, Hakuryu goes on to attempt the same hypnosis-induced suicide on Goku. Selling to a general a chemical weapon which could potentially kill hundreds of thousands, Hakuryu then turns around and sells another weapon to the enemy country of the general he had just does business with, not caring who dies as long as he profits.
  • GoLion:
    • Emperor Daibazaal, the ruler of the Galran Empire, is a despotic conqueror, slaver and murderer. Seeking to expand his grasp across the Galaxy, Daibazaal conquers planets that will submit and destroys those that will not. The slaves taken are condemned to fight in gladiator arenas, or fed to the monsters on planet Galra for his amusement. Daibazaal has no hesitation at taking attractive slave women as concubines. One that he once favored once begged him to give better treatment to the slaves, for which he strangled her to death. Daibazaal and his son Sincline have a mutual loathing of one another and Daibazaal has no compunction trying to get him killed. Brutal, nasty, smug and cruel, Daibazaal is an example of an Evil Overlord at his worst.
    • Prince Sincline, Daibazaal's son and eventual leader of the Galran armies, is introduced presenting his father with the severed heads of the leaders of worlds he had conquered. Sincline spearheads the invasion against the planet Altea, guarded by the robot GoLion and its five pilots. Initially honorable and chivalrous, Sincline reveals his true colors when he cheats in single combat and develops a fascination with Princess Fala, one of the pilots. His obsession carries over to abducting her cousin, Princess Amue, who resembles her greatly and abusing—possibly raping—her. Sincline is notorious for his rage at subordinates and failure is usually met with swift and painful death. With no loyalty to his father, Sincline tries to assassinate him, before pulling a successful coup where he forces Daibazaal to fight the heroes with the promise he'll be restored to the throne if he wins. Naturally, Sincline sabotages his father and lets Daibazaal die before hemming in GoLion with innocent prisoners in exploding capsules. When Galra is besieged, the new King Sincline slaughters his own subordinates who wish to surrender and has no compunction trying to kill Princess Amue. When his grandmother, Daibazaal's mother and adviser Witch Honerva opposes him in grief over Daibazaal's death, Sincline viciously kills her. He later takes a hostage to ensure his escape from Galra and tries to kill the heroes via bombardment, declaring that as long as he lives, Galra will never die.
  • Gosick: Marquis Albert du Blois is the leader of Sauville's Ministry of the Occult. A man obsessed with the supernatural, he viewed his own children as nothing more than tools. After he met a woman who matched the bloodline he was looking for, he kidnapped her and raped her to produce a child before stealing the daughter Victorique from her. Albert apparently manipulated the start of World War II and blackmailed the King into making him the Prime Minister. He also managed to amass a legion of followers by making the people believe that his daughter was a monster.
  • Goth: The Monsters of the Week from the first and second chapters:
    • "Wristcut": Mr. Shinohara, the chemistry teacher of Itsuki Kamiyama and Yoru Morino, is a lunatic with a fetish for slashing off the hands of innocent people, even lopping off the paws of animals and cutting off the hands of children. Shinohara finally graduates to full-on murder when he kidnaps and kills a local celebrity for her hands, and when he's convinced to believe Morino stole his collection of hands, Shinohara attempts to murder her in berserk rage.
    • "Goth": The seemingly-innocuous cafe manager is secretly a Serial Killer who sadistically mutilates and murders women, before cataloging the gory details of his kill in his notebook. A hateful misogynist, the manager tells his victims they are guilty sinners who deserve to die. Capturing Morino, the manager only keeps her alive for the time being out of fear the police are on his tracks while telling the captive girl how much he looks forward to brutally killing her.
  • Grashros, by Muneyuki Kaneshiro and Akeji Fujimura: Kanji is the leader of Ibesa, a hedonistic tribe of young people in prehistoric times that attack other tribes to enslave their elderly population. Meeting the protagonists after their villages were destroyed, Kanji acts as a cheerful young man to convince them to join his tribe. When the protagonists and one of his younger servants try to free some elderly slaves, Kanji kills said servant, the grandson of the tribesmen that he enslaved, and hangs his body, before trying to beat a little girl to death. Kanji's cruelty traumatized his victims, resulting in Akku avoiding human society for years.
  • The Greatest Magicmaster's Retirement Plan: Godma Barhong is an arrogant researcher who will go to any lengths to sate his scientific curiosity and prove his genius. As the head of the Element Factor Separation Project, he tampered with the mana information of child test subjects, uncaring of the painful side effects and the death of one of his subjects. After becoming a fugitive, Godma acquires hundreds of kidnapped children and shuts off their nervous systems in order to mold them into combat puppets, and then sends them to attack soldiers, civilians, and a military school in order to test their capabilities. He kills any subject who loses the ability to fight and abuses a sentient subject, Melissa, when she protests. In order to kidnap Alice for his experiments, Godma sacrifices several subjects to cast a mass destruction spell on her school as a distraction, and later casts it again on the heroes using Melissa's life. When cornered by the military, Godma prepares a contingency plan to smuggle his data to his backer, hoping that others will continue his horrific research.
  • Green Blood: Edward King was an Irish Immigrant to New York decades before the series started with his friend Gene McDowell with whom he founded the Gravediggers gang. Edward grew bored with the Five Points and left, after murdering the woman who had borne him two children, in front of his elder son Brad, inspiring Brad's lifelong hatred and desire for revenge. Years later, Edward returned when the Gravediggers were warring against their rivals, the Iron Butterflies, and manipulated both sides, supplying Gene's son Kip with a Gatling Gun simply to make the carnage more fun. After escaping again by threatening Kip's life to Gene, Edward returned to the frontier with his Crimson Gang. When one of them was defeated by Brad, Edward killed him by crushing his skull with his horse's hoof simply because the man was helpless and Edward could. Edward initiated a massacre in another town, capping it off by shooting a priest and declaring "This is my freedom" before they rode to Montana where Edward supplied his weapons to help wipe out the Sioux and Cheyenne warriors for amusement and gain. Edward later faked his capture in Kansas City to plunder its gold reserves. When both his sons confronted him, Edward laughed that he had "forgotten the bitch bore two curs" and engaged them, willing to have his stolen battleship burn down Kansas City and trying to kill his sons with sadistic relish, mocking his younger son how it would feel to die at a "real man's" hands.
  • Grimm's Fairy Tale Classics:
    • "Bluebeard": Bluebeard is a seemingly charming rich gentleman, but in truth is a vicious Serial Killer who keeps the corpses of his murdered wives locked in a dark room. When his previous wife discovered his dark secret, he murdered her in a blind rage. Seeking a wife who would not disappoint him, Bluebeard woos a young maiden, Josephine, and coerces her into marriage, offering her riches and all his treasures, but warns her not to enter his cellar, for fear of her discovering his dark secret. When Josephine disobeys him—he had given her the keys to all the rooms—and discovers all of his previous victims, Bluebeard flies into a rage and chases her throughout the mansion, sword in hand, intent on killing her for her disobedience. Vengeful and unforgiving, masked by a polite exterior, Bluebeard was just as vile as his literary counterpart.
    • "The Six Swans": The wicked queen marries the kind king, whereupon she attempts to murder his seven children. When this fails, she turns his six sons into swans, forcing his one daughter to stay mute for six years and sew special shirts to break the curse. The Queen proceeds to murder her husband, finding her stepdaughter with a new family, whereupon she throws her stepdaughter's baby into the woods to die and frames the princess for it in an attempt to have her burnt as a witch.
  • Guilty Crown:
    • Shuichiro Keido is the leader of the GHQ Anti-Bodies and the Arch-Enemy of a resistance organization known as Funeral Parlor. In the past, upon learning that his friend Kurosu Ouma's offspring would become the progenitors of a new race in the aftermath of the Fourth Apocalypse, he experimented on countless orphan boys to create an "Adam" that would deny Kurosu the privilege of shaping the next generation of humanity in his own image. After learning that Kurosu's research on the Apocalypse Virus surpasses his own, he murders his friend in a jealous rage. In the present day, after learning that Funeral Parlor is rebelling against GHQ, Shuichiro then uses any means to take them down, such as firing a Kill Sat that ends up killing several Funeral Parlor members and their collaborators. He then launches an Apocalypse Virus along with his general, Segai Waltz Makoto, in order to incriminate Funeral Parlor. After one of the districts of Tokyo, Loop 7, gets infected thanks to Keido's machinations, Keido announces Loop 7 to be sealed for the next ten years and then enacts a plan to exterminate anyone in the district. Secretly helping an organization known as Da'ath, Keido attempts to revive the deceased leader of Funeral Parlor, Gai Tsutsugami, in order to make him the next Adam, and also helps Da'ath initiate a worldwide outbreak in order to spite Kurosu even further.
    • Segai Waltz Makoto is a seemingly polite GHQ Anti-Bodies officer who is introduced hanging a man upside down. Capturing the hero, Shu Ouma, who joined Funeral Parlor, he attempts to manipulate Shu to turn against them. During the Funeral Parlor's raid on retrieving the Apocalypse Virus, Segai traps the members in an empty plane and launches the Apocalypse Virus all over Tokyo via a broadcasting tower. Participating in the Loop 7 massacre, Segai uses it in order to manipulate the students of Tennouzou High School into handing over the disguising members of Funeral Parlor. While tracking a scientist, Segai manipulates several civilians who needed a vaccine for the Apocalypse Virus in an office where several of Funeral Parlor's members are hiding before slaughtering them all. Segai subsequently attacks the last of Funeral Parlor stronghold before meeting his end when trying to kill a handicapped girl with a truck.
  • Guilty Gear Xtra: The narcissistic, psychotic, and sadistic Geena leaves her mark despite her short tenure in this interquel manga. Geena is a member of the Post-War Administration Bureau tasked with retrieving the War Relic "Zessen" from the Japanese colony. She narrowly kills its keeper, Mizuha's grandfather, in front of her and is only stopped by a recently awakened Tyr, who managed to destroy her arm. After that failure, she is now only concerned getting revenge on them for getting in her way. She later confronts them, sadistically shooting the young Tyr and leaving him to bleed out. When Axl Low intercepted her, she blows off part of a building to crush an innocent little girl and shoots him In the Back when he's distracted. After assimilating with the Gear Mothership, Geena announces her intention of annihilating "this rotten world" and every human in it as a weapon should.
  • Gunsmith Cats OVA: Natasha "Bloody Pierce" Radinov is a vicious ex-Spetsnaz who makes her living as an assassin and mercenary, who only accepts payment in heroin so she can sell it for higher prices in Russia. Introducing herself in a routine murder, Radinov accepts a hit for a gun-runner. Radinov proceeds to storm a police safe house, massacring every officer inside before killing her target. Later kidnapping the heroine Rally Vincent's partner Minnie May, Radinov forms a deeply personal grudge when Rally manages to injure her. Killing several innocent civilians who were just in a spot she wanted to relax in, Radinov sadistically kills one of her employers when the operation's chief judges him a loose end. When the chief, mayoral candidate Eddie Haints, tries to lure Rally into a trap for Radinov, Radinov simply sprays the area with machine gun fire, not caring if she kills Haints as well while killing several of his guards. When pursued by Rally, Radinov kills several more innocent people in her way and expresses her wish to torment Rally slowly to death, gloating she'll show the young bounty hunter "all she knows about pain."
  • Gun×Clover:
    • Sayuri Higuchi, Morito's master, openly talks about using children as experiments and making them into soldiers, and has no problems with getting rid of them when they outlive their use. One of her experiments with children, done so she could gain the ability to use "Dead Language," involved using 10,000 subjects as guinea pigs, of whom 90 percent died or were incapacitated. When an experiment was successful, she would chop the limbs of those that it worked on, and graft it onto herself.
    • Alex Valentine Wheeler Jr. shows he's a nasty customer by ambushing the heroine Kotonoha and tying her down before sexually assaulting her. He gleefully enjoys seeing her struggle and shifting through her multiple personalities until she realizes she's helpless. Later, he decides to murder two girls he was in charge of protecting solely to piss off Kotonoha's escort Morito by presenting him with their dismembered arms.
  • Guyver: Of the 12 Zoalords appointed by Archanfel, these two are the worst:
    • Richard Guyot plans to take control of Chronos by taking one of the Guyver Units for himself and becoming invincible. First he has his own Zoanoids attack numerous innocent people to recover the lost Guyver units. The Guyvers foil these attempts, so Guyot forcibly turns his underling Genzo Makishima into a Zoanoid, Enzyme I, who tortures Sho Fukamachi to death while under Guyot's control. Genzo only had a week to live, and does everything Guyot asked of him in exchange for being allowed to live longer, but Guyot simply commands him to self-destruct once Genzo finished his task, killing both Genzo and Sho. Guyot assists another Zoalord, Hamilcar Barcas, in one diabolical trap—they forcibly turn a man into a Zoanoid, take over his mind, and then set him on his son, the first Guyver Sho Fukamachi. The plan fails, but Sho is forced to kill his own father in self-defense. Guyot, fed up with his minions' failure, attacks the Guyvers himself several times, at one point catching two high school students in the crossfire. He even goes out of his way to torture another Zoalord, a Prototype named Murakami, to death, gloating as he does it, before attempting to do the same to Guyver I and Guyver III with the Unit Remover weapon. This also fails, as Archanfel, well aware of Guyot's treachery, attacks Richard himself. Guyot flees in terror, murdering several of his own forces. When cornered, Guyot uses a dangerous attack that would have destroyed the entire planet, just to save his own skin. While a coward at heart, Guyot was one of the most vicious Zoalords in existence.
    • Cabral Khan, along with Jabir Ibn Hayyan and Luggnagg de Krumeggnic, betrays Archanfel. Trapping Aptom in an And I Must Scream state, he uses him as bait to trap Sho Fukamachi and Toshiaki Hayami. When they manage to free themselves, he allows them to free Aptom, then hijacks Aptom's brain and uses him as a weapon to murder them both. Forcing Aptom to devour every Zoanoid in sight, all of whom are on Khan's side, he forces Aptom to torture Hayami to death. When Sho forcibly frees Aptom from the parasitic Mind-Control Device, Khan flies into a rage and broadcasts a signal to every civilian Zoanoid all over the city. Unable to stop themselves, thousands of fathers, brothers, and lovers march to their deaths as Khan eats them all alive. The audience even sees their loved ones begging them to stop, but they can't. Absorbing them to fuel his Dragon Burst transformation, he becomes a giant monster and starts frantically trying to murder Sho and Aptom. This is how he also murdered the last of the resistance in the days after X Day. When Sho unveils the Gigantic Exceed, Khan devours even more people to become even stronger.
  • Hades Project Zeorymer: Masaki is the mastermind behind the events of the series and the creator of the titular Zeorymer. Formerly a scientist for a secret organization who planned to betray them, Masaki creates his own clone as the pilot of the Zeorymer, and uploads his memories to the Zeorymer before his eventual death and implants them inside his clone Masato Akitsu in the future. He was trying to overwrite the clone's personality and happily uses Zeorymer's power, without caring about the cities caught in the crossfire.
    • Manga: Masaki Wakatsuki betrayed his partners before his death, creating clones of himself and his partner's wife before dying. Years later, when his clone Masato pilots his masterpiece Zeorymer to fight against the organization Nematodo, Wakatsuki's memories take over his mind. Later he rapes Miku, the clone of his partner's wife, while commenting how he cannot understand why her adoptive father never raped her. When Masato attacks Nematodo's headquarters in an attempt to destroy Zeorymer, it's revealed that Wakatsuki used a prototype of Zeorymer to resuscitate himself in a flawed body and take control of Nematodo by killing their leader. While fighting Masato, Wakatsuki wants to take over his body. When he is outsmarted and defeated by his clone, Wakatsuki tries to activate the self-destruction of the world-destroying machine inside Miku before being killed, which triggers the self-destruction of Nematodo's base in an explosion capable of destroying the world. A petty megalomaniac, Wakatsuki would destroy the planet rather than accept his defeat.
    • OVA adaptation: Masaki Kihara creates the mechas for the organization Hau Dragon as well as the Artificial Humans to pilot them before betraying the Hau Dragon to steal the Zeorymer and dying. Years later, when his clone Masato Akitsu pilots the Zeorymer, Masaki's memories start to take control of the clone's body during his combats against the pilots of the Hau Dragon. During these fights, Masaki exploits their genetically designed emotional flaws to happily kill them without caring about the civilians caught in the crossfire. After taking near-complete control over Masato's body, Masaki stops to pilot the Zeorymer, tries to rape his creation Miku and tells her about his plans to allow the vengeful Hau Dragon to destroy the world, knowing that he will rule by using another clone inside the organization if they win.
  • Happiness: Masami Sakurane became fascinated by vampires when one attacked his sister. Seeking to become one himself, Sakurane murders animals, and then children to drink their blood. Manipulating Yukino Gosho to take possession of the vampire Yuki and leaving Gosho for dead after cutting her neck, Sakurane forms a cult called the Blood of Happiness where he continues his murders. When Gosho finds them, Sakurane horrifically tortures her and even forces her to stab Sudo, the man who loves her, when he tries to rescue her. Eventually having Yuki torn apart to eat his brain, Sakurane begins murdering his followers and tries to kill Gosho for her blood as well.
  • Happy Sugar Life: Even in a setting populated by characters existing at different levels of sanity, this despicable duo stands out:
    • The nameless manager of the Princess Imperial restaurant seemed at first to be a Benevolent Boss, but in actuality is a self-absorbed, vain woman who revels in the attention her employees give her. When Satou Matsuzaka joins the restaurant, the manager's ego is bruised upon overhearing Taiyo Mitsuboshi asking Satou out on a date. Luring Mitsuboshi into her office, the manager traps Mitsuboshi in her cabinet, raping him repeatedly for a week to force him to love her. She also tasks her employees with sabotaging Satou's work as punishment for her catching Mitsuboshi's interest. A woman obsessed with maintaining her "kingdom," the manager left a permanent impression on Mitsuboshi, being responsible for his pathological fear of older women.
    • The father of Asahi and Shio Kobe is a wrathful, short-tempered force of pure rage. Upon meeting a young Yuuna, he raped her out of blind anger at her accidentally bumping into him. Being forced to marry her after getting her pregnant, he relentlessly abused her and Asahi, raping the former repeatedly. Not caring one bit for his family, he leaves his family penniless after receiving his inheritance, only to become worse after spending it on himself. After his wife and daughter escaped the house, he subjects Asahi to five years of torturous abuse, going as far as to rip Asahi's fingernails off in a mixture of annoyance at his son's insolence, and a morbid curiosity at seeing how much pain Asahi could endure. Appearing as a shadowy entity in Asahi's subconscious, his father was a demon both figuratively and literally.
  • Heavy Metal L-Gaim: Emperor Oldna Poseidal built the forces of the Poseidal Empire until he launched a brutal campaign of conquest and extermination to enslave or destroy all in his path. Exterminating his old enemies the Yaman Clan, save for a few members, Poseidal sets up a brutal dictatorship, using his former lover as a proxy Poseidal by brainwashing her and having her commit atrocities in his name, with torture, murder and extermination being commonplace. Taking the identity of Arms Dealer Amandara Kamandara, Poseidal supplies weapons to both sides to keep the conflict going, making it even bloodier, so he can remain in power. When he reveals himself at the end, Poseidal gleefully attempts to annihilate all rebel forces, uncaring that this will kill many of his own soldiers as well.
  • Heavy Object: Even in a world where war is the norm and most villains have some form of honor or loved one, there are others who instead go the extreme mile into evil:
    • The unnamed Alaskan Base Officer is a psychotic, cruel soldier serving the Faith Organization, and the first enemy Qwenthur and Havia face. Seeing Objects as superior to humans and refusing to accept harmony, the Officer starts a battle at the Legitimacy Kingdom Base, ignoring their white flag of peace. He sends out both his troops and his Object Prometheus, aka the Water Strider, into battle, causing a great deal of casualties. Capturing Milinda, Qwenthur, and Havia, the Officer plans to execute the latter two, choosing to brutally interrogate Milinda via hypnosis and electrodes, with no regards to how her personality will be affected, planning to hang her afterwards from the Object's guns as a display until she freezes to death to serve as a warning to his enemies. When his base is invaded by Frolaytia and her soldiers, the Officer refuses to surrender, gleefully attempting to shoot Milinda, Qwenthur, and Havia when they try to escape.
    • Anime: The corrupt Legitimacy Kingdom Councillor Flide in the anime has more crimes to his name. When Qwenthur and Havia located the Gen 0.5 Object, Flide was quick to block them from getting reinforcements in hopes of getting them killed, while setting up the four super country alliance to fall into a trap that would result in it being wiped out (including his own soldiers). Later, when the 37th division came to remove him from office, he sent out the Exact Javelin, with an elite he secretly prepared, in an attempt to attack the Baby Magnum and treat its destruction as a training accident. After escaping imprisonment for his crimes, he resorted to blackmail to gain resources for his revenge, which involved using the Mirror of Truth program to brainwash Milinda into sending the Baby Magnum on a rampage in hopes of wiping out the 37th division along with Klondike in hopes of triggering a four-way struggle between the four super nations. The first target destroyed was his hideout, with him in it, alongside the means to disable the program's effects. While he claimed what he did was for the safety of his country, Flide was, in reality, a greedy and unethical man who wanted to stay in power with no regards for innocent lives lost, never viewing elites as human beings.
    • Volume 3 & Anime: Prizewell City Slicker is an Elite of the Legitimacy Kingdom’s 24th Mechanized Maintenance Battalion, and a raving language protectionist. A smug sadist, Prizewell seeks to rid the Legitimacy Kingdom of its foreign languages, as he feels they’re holding his people back, as well as reinstate the Legitimacy Kingdom's abolished slave class. Stealing Object data from the Information Alliance, he plans to slaughter numerous miners who were planning to defect to the Legitimacy Kingdom and manipulate the fallout to his advantage. When that fails, he uses the stolen data to create six dummy Objects that lead an attack on Victoria Island, a Legitimacy Kingdom immigrant city, having already destroyed the 37th's very own Snow Quake and Active Sledge Objects. Once his dummy Objects have been destroyed due to an oversight on his part, he tries to kill Qwenthur, seeing him as the one responsible for their destruction, before going after Milinda's Baby Magnum. While Prizewell claims to be preserving the Legitimacy Kingdom's official language, in reality, he’s nothing more than a xenophobic hypocrite who doesn't even care for his own soldiers.
    • Volume 6: Dimiksy Nikolaschka of the Legitimacy Kingdom's Volga District was born as a result of his father cheating on the queen. Driven by a desire to keep this fact from the world and ensure his enthronement, he decided to kill his other family members and those investigating his origins, while implanting false information in the lineage department. In the past, he staged a bombing to procure the Object, Assault Signal, which resulted in many deaths, including its intended Elite, Execelsyla, and triggering the wrath of its designer, Claire Whist. Later, he ordered fake Information Alliance Troops to assassinate the White Bears, the bodyguards of his sister, Stavia, his final target, with a bombing. One day, he ordered his terrorists to bomb Stavia's hiding place, prompting her maid, Mikfa, to escape with her to Lexpop, where an ambush resulted in Mikfa being taken hostage as a means to make Stavia use the Assault Signal to fight Dimiksy in his Object, Broad Sky Saber, with the latter hoping to kill her after winning the Royal Duel and savoring her fear. When the Forrest Roller Object and the White Bears (having operated under the Unicorn alias) intervene, Dimiksy fired a laser to destroy the Forest Roller and another that almost killed the White Bears in an attempt to protect his object's weak point. He then finally aims a third laser at the float Havia, Mikfa, and Qwenthur were on, hoping to kill them.
    • Volume 10: Acres Kiss-of-Rose, aka Azathoth is the CEO of Salem Logistics, one of the 7th Cores ruling the Capitalist Corporation, and the one behind Nyarlathotep 's questionable actions throughout the story. Formerly a Capitalist Corporation spy, he formed the secret group Outer Gods to make life easier for his fellow spies. Becoming a CEO for Salem Logistics, he abandoned his old lifestyle and friends to indulge in his newfound wealth and status. Creating the Silver Key instant delivery system, Acres refuses to use jets to deliver packages, seeing them as a waste of money. Wanting to use the Panama Canal as a transportation route, he orders an attack on the nearby, safe Soberania District, where many innocents are killed—including Nyarlathotep's wife and son—turning the entire district into a literal Hell on Earth, all while claiming to be wiping out terrorist training camps, later doing the same thing to the Indian Ocean. Hearing news of the Gigant Hustler, he has two of his indestructible Objects compete, seeing the event as a trade show meant to showcase the power of his Objects. With one of his Objects destroyed and his reputation ruined, Acres plans on staging a fake large-scale attack to regain some respect.
    • Volume 11: Flag Eggnog, the first prince of the Legitimacy Kingdom's Warta District, is a loud-mouthed miscreant widely despised by his people due to his rampant gaffes, which usually prompts him to start a war to cover it up. When the Colorful Vanilla Drug is reported to have resulted in a war, he claims the drug wars are fake and are just fabricated by conspiracy theorists to blame the government, which only served to call for his resignation. In the past, he exploited a century long conflict between the Winchell and Vanderbilt families for his own gain by engineering 21 recent civil wars to cover the same sort of gaffes he made. In the present, he arranged Azureyfear Winchell to massacre Lady Vanderbilt and over 100,000 people aboard the LK Ship Rose & Lily, which he also happens to be on. He also collaborated with the Information Alliance's Martini Sisters to gain and exploit the information on the two families to manipulate an even bigger conflict to cover another gaffe. Finally, when things start going downhill for him, Flag drew a gun and attempted to put Lady Vanderbilt, his Information Alliance Contact, the military, the press, and everyone who dared mock him to the slaughter. Although he claimed his uncontrollable gaffes and war cover ups were beneficial to his country, he's nothing more than an incompetent, cowardly, and deluded traitor with an elitist viewpoint, who will bribe or kill anyone when things don't go his way.
  • Hellsing franchise:
    • Manga and OVA:
      • The Major, the psychotic leader of the "Last Battalion" of the Nazi remnant Millennium, is an unassuming, bespectacled, jovial fat little man who is defined by his belief that War Is Glorious. After surviving World War II, The Major consolidated his forces in South America, where they awaited their chance for one final, glorious combat. Acting behind the scenes, the Major had multiple humans turned into vampires, having them slaughter innocent people to slowly reveal himself to Hellsing. Finally taking center stage, the Major launched an attack on London, obliterating everything he saw and having his men slaughter every living thing in sight, including babies. The Major confesses there is no end goal; combat and war are their own end. The Major shows no hesitation in killing one of his own officers when he objects to the Major carelessly sacrificing their soldiers, and his ultimate goal is to die at the conclusion of his war, after having created one last great display of the carnage he so loves.
      • First Lieutenant Zorin Blitz is a bloodthirsty member of Millennium's Last Battalion. Ignoring her orders to gather intel on the Hellsing manor, Zorin launches an assault, psychically tormenting Seras and the Wild Geese before sending in her troops to tear the horrified defenders apart. While confronting Seras, Zorin uses her illusionary powers to make Seras relive the night her parents were murdered and her mother's corpse raped in front of her, while maiming Seras's defenseless physical body. When Pip tries to save Seras, Zorin uses her scythe to fatally wound him while his back is turned.
    • Anime series: Incognito is a sadomasochistic vampire who describes himself as living only for "total destruction". Working for his unseen boss, Incognito oversees the creation of the FREAK chip, which turns people into violent, unstable vampires. When the British air force come to investigate his castle, Incognito infects them with his chip, stripping them of their humanity and turning them into his unquestioning soldiers. Knowing a pacifistic vampire is monitoring his activities, Incognito attacks and devours the peaceful woman. Summoning a demon to destroy London, Incognito watches gleefully as it wreaks havoc on all in its path.
  • Hero Mask:
    • The man with the pseudonym of "Steven Martland" is the head of the LIVE corporation. Experimenting with the Masks on human test subjects with largely fatal results, Martland was also responsible for terrorist acts decades ago, including a bank bombing that killed multiple people, including the wife of police chief Richard. Intending to sell the masks as weapons, Martland has anyone who might expose him eliminated, unleashes the psychotic Grimm on the world and even attempts to have all the cops at a hospital massacred by his assassins, viewing all he does as "just a game".
    • Grimm, real name Jeremy Payne, is a deranged Serial Killer who previously based his killings on Grimms' Fairy Tales. Later arrested by James Blood, he was made into a guinea pig for Steven Martland's experiments. When Martland releases him and a few other test subjects, Grimm leads their breakout, killing multiple guards and blowing up the entire laboratory. Heading to SSC headquarters, he slits a cop's throat and gleefully massacres every officer there. A Mad Artist in his spare time, Grimm, unsatisfied in painting with his own blood, summons James to him so that he can kill him and use his blood to complete his masterpiece.
  • Hero Tales: Shimei is a sinister monster in both the manga and the anime:
  • Higanbana no Saku Yoru ni: Yoshihito Kanamori from "Mesomeso-san" (the first chapter) started as the homeroom teacher of Marie Moriya, a young girl bullied by her classmates. He used to defend her from the bullies, until the stress of his job got to him and he started to take his stress out on Marie. His supplementary lessons include molesting her and putting it on camera. When Marie gathered up enough courage to stand up to him, he strangles her to death, singing her a song about graduation from life to death while doing so, then dumps her corpse in the old school's septic tank. He also considered murdering other children when he thought that they were eavesdropping. When he encounters Marie's spirit in the restroom, he gives her a long "The Reason You Suck" Speech about her not going to the police to report on him while she was still alive and called her an imbecile who couldn't fend for herself. He then opens the door to one of the bathroom stalls, and upon finding that Marie has apparently physically manifested, he tries to strangle Marie a second time. When the deed was seemingly done, he proceeds to rape the corpse when he notices it was still there. While he claims that he did all this out of love for Marie, it's ultimately proven hollow.
  • Highlander: The Search for Vengeance: The ruthless Roman general Marcus Octavius earns Colin MacLeod's eternal enmity by massacring his people and crucifying Colin's wife Moya to see their home destroyed. With Rome's fall, Marcus vows to recreate it anew in his hunger for a world of order and beauty, working for countless evil forces throughout history including the Nazis themselves. When he takes over a future New York, Marcus unleashes a virus with an 80 percent kill rate to keep the population in line, and when they resist his rule with Colin, opts for some "creative brutality" in sending his forces to decimate the remaining population while planning on unleashing an even deadlier strain of the virus to kill every living thing in New York before he finally takes Colin's head.
  • High School D×D:
    • Freed Sellzen is an atheist exorcist who joined the Holy Church merely to hunt down and kill monsters. Upon being excommunicated, Freed loaned out his services to multiple villains to quench his blood thirst. First seen murdering one of Issei Hyodou's clients, Freed attempts to murder Issei himself, and when Asia Argento stops him, he tries to rape her, fleeing with her when Rias Gremory and her peerage overpower him. Working under the warmonger Kokabiel, Freed nearly beats Irina to death and taunts Kiba with the fact his swords were made from experiments that resulting in the deaths of Kiba's childhood friends. Finally willingly becoming a chimera for one last chance to kill the heroes, Freed even devours two of his own knights to further boost his strength.
    • Valper Galilei was formerly in charge of the Church's "Holy Sword Project", something he took advantage of by kidnapping dozens of children and performing heinous experiments on them, which proved fatal in many cases. When Galilei found many were incapable of wielding the Holy Sword, he merely had them all killed, leaving only Kiba alive. Galieli's actions were horrific enough to earn him excommunication by the Church, resulting in him allying with the Fallen Angel, Kokabiel, aiding him in his aims to create a colossal war. Facing Kiba while fighting with Kokabiel, Galilei tells him the children he killed were worthless and that Kiba should have died with them.
    • Diodora Astaroth attempts to bargain with Rias for Asia, and when rejected, kidnaps Asia and puts her in a device that drains her life force. Confronted by Rias and peerage, Diodora reveals he pretends to be injured to lure nuns, one of whom he attempted this on was Asia, to try and heal him so he can attack and force them to become his sex slaves to satisfy his depraved fetish. While fighting Issei, Diodora brags to Issei that he looks forward to raping Asia everyday while she cries his name. Finally defeated, Diodora still plans for Asia's life force to be drained out of pure spite even as he dies.
    • Rizevim Livan Lucifer, son of Lucifer and Lilith, is a hedonistic, wicked devil who believes Devils are meant to be beings of pure evil. To that end, he convinced his son to horribly abuse his own son Vali, using his son's wife as a hostage for that purpose. Rizevim then murdered his own son and abandoned Vali. Returning upon learning of Trihexa, the beast of the apocalypse, Rizevim seeks to use it to destroy the world and rule over what's left. Attacking the vampire race and also heaven to kill as much as he can in pursuit of the Grails to free Trihexa, Rizevim also abuses and tries to murder the gentle Asia Argento. When he is finally killed, Rizevim even uses his own soul as a means to unleash Trihexa, determined to take all creation to death with him.
  • Highschool of the Dead: Kōichi Shidō first shows he's a man to fear when, during a zombie attack, a student he's guiding twists his ankle and begs Shidō for help. Shidō's response was to kick him in the face, before gloating over the poor kid's impending death and his own survival by stating that the new world had no place for people that weak. Then he uses his position as a teacher to get himself elected leader of the surviving group. Shidō sets out to make himself a cult leader, promoting sexual activity amongst the kids to make them loyal to Shidō. A student doesn't like the action going on in the "orgybus" and asks if he can just be dropped off at his house to see if his family is ok. Shidō and his group, who are at this point a cult, decide that the best way to grant his wish is to throw him out of the bus and let him be eaten. In a Zombie Apocalypse, Shidō stands out as eviler and viler than any walking corpse.
  • High School Prodigies Have It Easy Even in Another World (anime & manga): Duke Oslo El Gustav is a wrathful zealot for the Freyjagard Empire's Social Darwinism, seeking to kill his citizens as tribute to Emperor Lindworm. In order to fatally starve his people, he enacts forced gentrification, bans agriculture via "cleanliness" laws, and levies heavy taxes. When a neighboring region revolts, Gustav uses a spell powered by unwilling spirits in an attempt to incinerate the rebels and the nobles who failed to stop them. Upon seeing the broken remains of his prized emperor statue, he converts several Blue Brigade soldiers into tortured flaming zombies as revenge. Worshiping the emperor as the embodiment of his ideology, Gustav dies wishing for his master to crush the world's "weaklings" underfoot.
  • Hiuri, by Akira Himekawa: Soujin, consumed and defined by the desire to obtain the power of the Hiuri, willingly lets an Evil Spirit possess him and he slaughters the Kiriba Clan he was supposed to serve in a bloody coup d’état. He takes a young, highly skilled ninja named Soujiro and mutilates him by removing his arm and eye and forces him to be his Dragon, and renames him Kiriga. Soujin then orders hundreds of deaths all over Japan, leads the direct conflict of a former young Heiga Clan ninja named Korin with her old best friend Hime who is forced to kill her. And finally, to spite the Kiriba Clan for its failures, he engineers another civil war which ends with only one survivor.
  • Hohzuki Island: Kuwadate is the teacher on the seemingly Orphanage of Fear on a island in Japan. In the same chapter where he is introduced, he attempts to rape his co-worker Yukino. After she defended herself, Kuwadate accosted one of his preteen students and tried twice unsuccessfully to rape her. Kuwadate is by far the most vicious and dangerous of the teachers. When the same student who he tried to rape fall unconscious, Kuwadate tries to rape her again only to be stopped. When a child lies to protect his teammates, Kuwadate breaks his leg and leaves him alone in the wilderness. After he apparently dies while trying to kill the children, he reappears, trying to kill now both the children and his own coworkers. When The Reveal happens, Kuwadate ends up being the only actually evil teacher, lacking any redeeming qualities, and shows his heinousness by being as bad as the children see him.
  • Hollow Fields: Miss Eleanor Weaver is the principal of Hollow Fields academy. In the past, after she succumbed to an incurable illness, she began practicing forbidden science, and tries to corrupt other doctors to her side. When her husband found out, she then transferred his consciousness into a mechanical box while having his body destroyed. After becoming the principal for more than a hundred years and seeing the bodies of her subordinates—better known as Engineers—begin to deteriorate, Miss Weaver made a deal, where the students were unable to leave Hollow Fields after graduation, and anyone with the lowest scores would be sent into "The Windmill". It was soon revealed that the children that were sent to "The Windmill" are being experimented on, so that she could transfer the Engineers' consciousness into the children, and when that failed, they essentially lost their memories, becoming hordes of zombies. Due to the extreme impatience of the Engineers, Miss Weaver tries to eliminate both the Engineers and the children of Hollow Fields with Rocket Engines as a last resort. Motivated solely on increasing the reputation of the school more than anything else, Miss Weaver is the most depraved of all Engineers.
  • Hols: Prince of the Sun: The evil Ice Devil Grunwald is known for his lust for power and cruelty. When Hols was just a newborn, Grunwald arrived at his village and proceeded to destroy it by turning the people against once another and then destroying every human until none were left, save Hols's father and his infant son, who fled. In the present, Grunwald continues to terrorize a village by trying to starve them out and when Hols kills his pet pike that was preventing the village from fishing, Grunwald decides to get serious. Using his "sister" Hilda, whom he himself had orphaned, Grunwald tries to bait Hols and preys on Hilda's mind so Horus will be killed by the girl he cares about most. After this, Grunwald simply attempts to kill everyone in the village in a final assault.
  • Holyland: Yagi kidnaps the hero's love interest Mai, force-feeds her the drug True to get her into a state of severe addiction, and ties her up in a place where three of his henchmen might possibly rape her. He has the whole thing video-recorded and broadcast over the Internet via his cellular phone as a way to keep Yuu from fighting back while Yagi's thugs beat him to a pulp. Even his boss King doesn't sink this low.
  • How NOT to Summon a Demon Lord:
    • Keera L. Greenwood is the older brother of Shera and the prince of the Kingdom of Greenwood. He is known to be physically abusive towards Shera, while seeing her as nothing but a Sex Slave that he rightfully owns and can use to continue their bloodline. Eventually, Shera had enough of his mistreatment and ran away, leading to him obsessively trying to recapture her and bring her back. He has a complete disregard for life, not caring how many people he endangers to achieve his goals and believes the entire world exists to please him. This is shown when he callously declares war over the pettiest of reasons, or when he summons the Force Hydra (a dangerous and destructive beast) even though he had no means of controlling it. He's also shown to be incredibly racist to all races other than the Elves. When he finally recaptures Shera, he has her chained up and attempts to rape her while also putting her under mind control magic to make her desire to come back with him.
    • Paladin Saddler of the Church of Celestials is a twisted sadist behind a mask of pleasantry, Saddler butchers villages he suspects are "evil", killing them to the last man, woman and child. A torture enthusiast, Saddler is fond of attacking demihumans or anyone he so much as suspects of worshiping demons regardless of logic or justification, taking them and torturing them to death as a form of "purification" and justifying his beliefs under the notion that he is a god. When he captures Diablo's friend Rem, Saddler tries to torture her to death as well, his supposed righteousness nothing more than a mask for the twisted monster he truly is.
    • Paladin Captain Batutta is a ruthless knight behind the Death Knell curse. Appearing an ally for Diablo's party in solving the illness at Zircon Tower, Batutta is later revealed to be the one responsible. Learning about a curse made from prime evil, the collective embodiment of sin, Batutta entrances people into committing evil deeds to extract the substance and then spread it in the town's water supply where he would then impose high taxes to the people for the cure and swear fealty to the Church, letting the paladins abuse and leaving those who can't afford to die. Learning Lumachina could cure the curse, Batutta plotted to corrupt her, kidnapping her and Rem before handing them to his servant to sexually assault them while luring Diablo to a trap. When Diablo and Sherri manage to best him ruining his plans Batutta as a last act tried to take them with him by burying them in a cave-in.
  • Hundred (anime): Vitaly Tynyanov was the lab director of the Warslan Research Facility where ill children were taken in to be vaccinated with Savage fluids. Many died in the process and, of those who lived, the injections continued. The remainders either went berserk and attacked each other or simply died out, leading Sakura Kirishima to be the only who survived the experiments. Feigning kindness to three former child slaves, Vitaly enlists them to capture the cores of Savages and Variable Stones so she could produce a biomechanical army of monsters; the siblings were ultimately pawns she cared little for, even going so far to use a device to force them to work against their will. During the siege on Little Garden, Vitaly meets her former lover Judar Harvey and reveals she committed all these atrocities to spite him, intending to bring all of Little Garden and what he stood for down. As she's dying, Judar expresses his appreciation for her contributions, but Vitaly smiles in cold satisfaction at how her horrific research served a purpose even in death.
  • Hydra, by Tetsuo Hara: Minister Usami is a corrupt Japanese official plotting to sell out his nation as long as he can benefit. Usami blackmails the hero Yomi into working for him by threatening Yomi's beloved sister Mamiko, while having Yomi assassinate his rivals. Usami's corruption runs even deeper, and it is revealed he intends to use biological weapons to wipe out half of Japan's population, starting with Tokyo, to make it easier for foreign powers to take over.
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    I – L 
  • Ibitsu: The "Strange Lolita" is a Serial Killer implied to be a malevolent spirit. Having claimed enough victims to be known as an Urban Legend, the Lolita obsessively stalks men, tormenting them and murdering their loved ones before killing and implicating her victim as the perpetrator of a Murder-Suicide. Torturing a victim after butchering his family, she broke the man, making him always wear a filthy dress and eat garbage. After eliminating Kazuki's friends and family, the Lolita captures him and keeps him locked inside his house for days, mutilating him whenever he displeases her before finally killing and framing him too.
  • Ichi the Killer is a twisted manga, as these characters demonstrate:
    • Masao Kakihara, a twisted Combat Sadomasochist whose boss is murdered by the titular Ichi, begins a hunt for the mysterious assassin in his obsession to discover the ultimate pain. Kakihara participates in a number of murders of Yakuza and civilians alike and has no compunction allowing rape or torture to occur under his watch. Cold-Blooded Torture is his specialty, in fact, and he tortures one man by hanging him from multiple needles and hurling hot tempura oil over his bleeding back. Obsessed with the point where pain and pleasure meet, Kakihara terrifies all who meet him.
    • Kakihara’s Co-Dragons, Jiro and Saburo, brag that they've raped hundreds of women. Driven to outdo one another, they introduce themselves by asking a pair of lovers who the women preferred in bed. When the women give an answer, the offended twin viciously tortures and kills them. The two later abduct a prostitute after brutalizing her and rape her to get her pimp to talk. Despite Kakihara's orders not to kill them until he verifies their information, the two play a game to see who can hurt the two worse solely to prove who's better at causing pain. When one accidentally kills the pimp, the other kills the girl just to prove he can kill someone as well. After Ichi kills Jiro, Saburo is only angry because he wanted to kill his brother himself one day. He then proceeds to kill a man Kakihara tortured earlier and rapes and murders the girl with him, before killing her with a knife through her genitals.
  • Iczer:
    • Fight! Iczer-One: Big Gold is a powerful alien android who, along with Iczer-1, is one half of a machine created to grant wishes. Granting the wish of the Cthulhu race's matriarch to save her dying race, Gold ends up turning her species into a fascist leadership with her as their ruler, forcing the matriarch to be her slave and renaming her Sir Violet. Desiring to Take Over the World and eradicate humanity, Gold sends parasitic aliens that mutate and control people from the inside, turning the world into an apocalyptic wasteland, with Nagisa's parents becoming victims themselves. When Sir Violet's plans to destroy Iczer-1 and Nagisa all end up failing, Gold kills her and decides to kill the duo herself. Destroying a human military spaceship, Gold laughs as she witnesses the destruction she's caused on earth, later attempting to kill Iczer-1 herself.
    • Iczer Reborn: Neos Gold is the monstrous "daughter" of Big Gold herself. Fleeing to Earth to escape Iczer 1, Neos proceeds to attack entire cities and military bases to force Earth to recognize her as a god and use them to bait Iczer into a trap. Routinely sending out her minions to kill as many as possible, Neos also coldly executes them for any failing her before resurrecting the fallen Iczer 2 to fight her battles for her. Upon the finale, Neos Gold plans to use earth as a power source and uses countless humans as human shields before planning to kill the Iczers and annihilate Earth anyways.
    • (Iczer Girl) Iczelion: The wicked sibling team of Cross and Chaos, androids created by Big Gold, travel the galaxy with their forces, the Geas, murdering and destroying all they find. They strip a planet of resources, killing everything there and then hunt down the planet's defenders, the Iczelion, before murdering them, the OVA starting with Cross gleefully torturing an Iczelion to death after wiping out all life on her world. Arriving on earth, Chaos dispatches his strongest soldiers, the Voids, to wipe out entire cities and kill as many people as possible while Cross targets the new Iczelion, gleefully trying to murder her innocent civilian friends and kill and torture as many innocents as she can.
  • ID: Invaded:
    • John Walker, true identity Takuhiko Hayaseura, is an elusive figure with a god complex who has corrupted numerous people into becoming serial killers, orchestrating the deaths of 44 people. Walker would have these killers repeatedly murder the child telepath, Kiki Asukai, making her suicidal, and would trap her inside the Mizuhanome System for three years when she got rescued. He would then frame Hunetaro Momoki for his murders, and when his identity is exposed, Walker would activate Asukai's power to bring everyone in the Kura building into the ID Well for him to kill in the ID Well.
    • Denshin Katsuyama is among the many people convinced by John Walker to continuously murder Kiki Asukai in her dreams. Developing a lust for killing, Katsuyama becomes "The Challenger", kidnapping six people, most of them being children, and forcing them to fight him, brutally beating them to death; one girl ends up so gruesomely murdered that her mother killed herself upon seeing her daughter's mauled corpse. Katsuyama would then kidnap Kiki Asukai, planning to kill her in the real world, after he beats her near death.
  • Ikki Tousen:
    • Chuuei Toutaku, the Big Bad of season 1, is the leader of Rakuyo Academy, and the descendant of Dong Zhou. Having participated in the Big Fighting Tournament as a freshman, he killed numerous fighters, claiming control over many Kanto high schools. Sending Shishi Ouin to destroy Nanyo Academy from the inside, he later orders Ryofu to kill him after he tried assassinating him. Doing whatever he can to prevent his destined death, he commences the Big Fighting Tournament to have Hakafu Sonsaku killed, even banning finals so that no other fighter can kill him and take away his control over the schools. Knowing that Ryofu will be the cause of his death, he gives a deadly curse to Hakafu and has her show up at his place to kill Ryofu, promising to murder Ryomou if she doesn't comply. When Ryofu kills him, he cures Hakafu's body before implanting his soul into her, later taking control of her and attempting to gleefully murder Ouin and all of Hakafu's friends.
    • Dragon Destiny & Xtreme Xecutor (anime seasons 2 & 4): Chuutatsu Shibai, the descendant of Sima Yi, is the selfish, paraplegic chief strategist for Kyosho Academy. Desiring to bring about a new age of war and take over Kanto, Shibai makes a deal with the spirits of ancient fighters to acquire the Dragon Jade and use it to help them possess their descendants. Manipulating everyone to further her goals, Shibai later takes Kan'u prisoner, allowing her men to torture her for information on the Dragon Jade's location. Arranging Sousou to become possessed by his inner dragon, she has him kill Hakafu and Kakouton, later leading a battle against Seito Academy for the Dragon Jade. Not caring for the loss of her fighters, she attempts to murder the Seito survivors before strangling Gentoku for the Dragon Jade. With her dying breath, Shibai uses the Dragon Jade to awaken Sousou and Gentoku's inner dragons and have them kill everyone. Returning from the dead as Kentei, he plans a fake tournament where the fighters' blood will be used to resurrect thousands of corpses to serve as his army, arranging to have them possessed with the ancient fighters' spirits and conquer Kanto. Brainwashing Kan'u into obeying his orders, he forces her to fight Ryomou, attempting to kill them both when Kan'u snaps out of it.
  • Innocent:
    • Subyss is a Torture Technician attached to the Parisian Parliament who views suffering as an art form and admittedly sees himself as the mirror image of Charles-Henri Sanson. The latest member of a lineage consisting of professional torturers, Subyss takes sadistic pride in causing pain and uses everything at his disposal to break the human body, including strappado and impaling a man through the chin before forcing him to ingest melted sulfur. When Subyss is called to extract information from the benevolent Robert-François Damiens, he horribly tortures the man for two entire months to make him confess to false accusations, comparing his situation to a "dansieur leaping in the depths of Hell" and almost killing him before the day of his execution arrived. Wasting no time in getting drunk to distract himself from the fact that he was fired, Subyss comes back to his senses only after hearing Robert's screams.
    • Count De Luxe is an utterly loathsome member of the Royal Court with a fervent hatred for commoners. Introduced kicking a child worker in the face for trying to eat bread, De Luxe develops a rivalry with the good-hearted Alain, whom he mocks for being an individual with a mixed race. Discovering that Alain intended to open a school for any children regardless of status or assets, De Luxe burned the school with the students inside, killing all of them. Confessing to have started the fire, De Luxe cowardly executes Alain even after the latter had spared him and has him incriminated as a rebel who wished to overthrow the country, assuming the position of a "hero who saved France" while personally refusing to accept responsibility for his crimes, claiming that the "cries and screams of those maggots burning alive were cries of joy".
  • Innocents Boys' Crusade: Sir Hugo at first seems an affable member of The Knights Templar, eager to help the Children's Crusade in their goal. It is revealed Hugo is paying townspeople to fake miracles to enhance the Crusade's reputation and earn more money for himself. When the kids cut ties with him, Hugo has bandits attack them for the money, killing multiple children. Hugo then convinces three of the boys to join him, raping them as an "initiation" and having them sway others to his side. When one boy resists Hugo's attempted rape, Hugo beats him and has him thrown out of the castle where the boy commits suicide in shame. Hugo then has his initial three recruits fight to the death for his entertainment in a "rite of courage" before he is ambushed by the young Crusaders Nicolas and Guy, having the audacity to plead for his life by claiming they were nothing before him just before Nicolas beheads him.
  • In/Spectre: The former head of the Sakurawaga family was a greedy man obsessed with the Kudans' power. Believing the Kudans' power to read the future would bring him fortune, Sakurawaga had Kudans hunted down and their meat fed to his family to test it, killing them. After numerous failed attempts, Sakurawaga came up with an idea to mix mermaid flesh with the Kudan meat, killing more and continuing until the end of his life. Even after death, his obsessions continue to haunt his family as he entrusted his mission to his descendants, reaching the modern day, causing Kuruo's Dark and Troubled Past and Rikka's descent to evil.
  • Inuyasha franchise:
    • Original manga:
      • Naraku is a manipulative half-demon seeking the Shikon Jewel. Born out of the bandit Onigumo's pact with demons to covet the love of the priestess who guards the Jewel, Kikyo, Naraku instead uses his first moments to mortally wound Kikyo and make her think her lover Inuyasha betrayed her. When Kikyo has the Jewel burned with her body, Naraku, while awaiting its return, curses a family of monks to die slowly and horribly with each generation lest they kill him, and graphically murders a group of children with his poisonous miasma. In present time, Naraku becomes more active as the Jewel returns; orchestrating countless demon attacks to devastate cities and towns across the country; creating incarnations of himself to carry out further massacres; corrupting a young demon slayer into killing his family and manipulating him as a puppet; and resurrecting the Band of Seven, a group of mercenaries who have killed thousands, to murder as they please as a distraction while he experiments and strengthens himself. Horrifically abusive to his incarnation-children, Naraku threatens their lives to ensure their allegiance and cruelly leads them to their deaths as soon as they cease being useful to him. A spiteful, sadistic monster, Naraku deals with his own depression and insecurity by devastating the land of Feudal Japan and seeking nothing more than to cause as much misery as possible.
      • Hakudoshi, Naraku's incarnation born of a split from the Infant, is the most like his father in cruelty and sadism. Murdering multiple demons to examine their minds for the secrets of the netherworld and forcing Kagura to risk her life to test the gates, Hakudoshi eventually unleashes swarms of demon rats to devour entire villages to lure out Kikyo and plans to unleash them all over Japan should she not give herself up, showing sadistic glee in the almost unparalleled amounts of bloodshed caused. Later murdering demons for his own experiments to create the living armor Moryomaru, Hakudoshi even plans to backstab Naraku with no loyalty to anyone or anything but himself.
    • Anime films:
  • Inuyashiki's Yakuza arc: Samejima is a Yakuza boss who regularly abducts, drugs, rapes, and kills women. He is first introduced leering over the corpse of a woman he violated before forcing one of his underlings to give him a blow job. His next target, a woman named Fumino, manages to escape him before he could do anything to her. Determined to get Fumino, he tracks down her mother, who it is heavily implied he tortured to get Fumino's whereabouts before killing her. He orders his men to grab Fumino while he strangles her fiancé, Satoru, to death (but is thankfully revived by Inuyashiki) and seemingly kills Inuyashiki when he tries to stop him. Before Inuyashiki confronts him, it's heavily implied that he got what he wanted from Fumino. Samejima orders his men to shoot Inuyashiki in retaliation for beating him up. Even Inuyashiki, who loves nothing more than helping others, decides that Samejima is beyond redemption, blinding and crippling him.
  • Irresponsible Captain Tylor: Prime Minister Naku Ra Wang, the chief advisor for Empress Azalyn, seeks to become emperor of the Raalgon Empire. Using the death of her father, he manipulates Azalyn into declaring the United Planet Space Force as an enemy, resulting in thousands of deaths on both sides. Feeling impatient, Wang tries to assassinate Azalyn by setting off an explosive in her room, which places Tylor into a coma. After Azalyn returns from the Soyokaze, Wang manipulates her and the council into commencing an attack on the UPSF headquarters, planning to win the battle, start a war with the UPSF, and increase his reputation as the war's chief proponent. Six months after his plan fails, Wang tries to start another war with the UPSF by hiring both Raalgon terrorists to cause destruction on Earth, and a mysterious third party to destroy Azalyn's home planet in order to stir up both sides. Once the war starts, Wang launches a coup on the Melva, holding Azalyn captive, seizing the throne, and declaring a full-scale attack on the UPSF Spacefleet.
  • I"s: The Marionette King (Samejima) is a senior in Ichitaka and Iori's high school. When Iori's photo shoot makes her well-known, he's at the forefront of the other seniors who gather in front of the window of her acting club and sexually harass her before starting to chant her to strip, emotionally damaging her. After that, he organizes a fake photoshoot of the girl students in order to secretly film them while they're changing, with Iori being the real target. When she notices the hidden camera and tries to get out, she's almost raped by his underlings. After the Marionette King and other seniors are expelled from the school, he then concocts an elaborate plan that lures Iori into a dilapidated building where she is trapped by him and his gang with the intention of raping her as revenge for getting him expelled. When this plot is foiled by Ichitaka and Jun he vanishes from the story only to reappear in the last couple of volumes where under his internet moniker "Marionette King" he sends messages declaring Iori as his "puppet" and his intention to rape and kill her and sell the Snuff Film of it. When Ichitaka fights him at the end the Marionette King has been driven further insane by drug use. Even when he's defeated, the Marionette King can only think about raping and killing Iori. The only reason that he stalked Iori was because he was obsessed with her and wanted revenge for his expulsion from school. He blamed everyone but himself for his self-inflicted trouble and was unrepentant to the end.
  • Is It Wrong to Try to Pick Up Girls in a Dungeon?: The dungeon isn't the only place where one will find monsters:
    • Goddess Ishtar forces her familia into prostitution and expands her ranks by kidnapping women, either right off the street in the pleasure quarters, which she runs with a Reign of Terror, or out of the dungeon. She also expands her ranks by buying slaves and putting them to work as prostitutes. She isn't content to have clients come to her familia prostitutes willingly either, and has men kidnapped and forced into being "clients". She demands absolute obedience—otherwise, she will send Phryne Jamil to have any and all dissidents beaten half to death and brought before her to be raped until they can no longer say "no". She sees nothing wrong with rape, even raping Hermes onscreen, and treats Hestia with disdain, because the latter is a virgin goddess. She has a petty, spiteful grudge against Freya for being considered more beautiful and having a stronger familia than herself, and so decides to declare total war, squashing everyone in her way, and to this end, forces her slaves, like Haruhime, into a Human Sacrifice ritual that would destroy their souls with no hope of recovery just for a cheap power-up. When Freya has finally had enough and retaliates, Ishtar abandons her familia while trying to escape, planning to set up shop elsewhere.
    • Phryne Jamil, Ishtar's top enforcer, is as hideous on the outside as her personality is twisted and cruel. Completely deluded into believing she's the most beautiful woman, even more so than both goddesses of beauty—Ishtar and Freya—she takes any and all men she finds "tasty" and drags them off against their will into her "love nest" dungeon, hidden in the basement of the Ishtar estate, pumps them full of aphrodisiacs and terror, and then rapes and tortures them until she gets bored, by which time, they are completely broken, bloody, and permanently impotent; she happily tells herself, and anyone she thinks will listen, that they're so love-struck that they will never be satisfied, sexually, by anyone else. She greatly enjoys beating her fellow familia members, or anyone else who happens to cross her, half to death, especially those men who try to escape her "affection". She calls Haruhime "ugly" for the fact that the latter is a virgin, and, in addition to chaining her up and happily preparing to kill and destroy her soul, smacks her around for the slightest resistance, real or imagined.
  • Jackals: Vampire Franco Odman is a portly little man who ends up as the series's ultimate villain. The head of "The Bat", the information network of the Gabriella gang, Franco double-crosses his boss Don Salieri and has him tortured to death, along with purging many of his supporters and manipulating the brutal gang war between Gabriella and their rivals Tennouren to claim lives on both sides. In the past, Franco further manipulated one infamous Jackal into attempting to assassinate the greatest Jackal of all, Grim Reaper Roxy, by holding the man's wife and son as hostages. Seeking to escape Cicero City, Franco arranges for the military to begin shelling the place to wipe out the gangs with no regard for civilian casualties, and when Alligator Nichol tries to stop him, Franco reveals he has Nichol's love interest as a hostage by a vicious rapist, before attempting to kill Nichol and his allies.
  • Jack and the Witch: Queen Auriana is an evil witch and the ruler of her domain. Auriana abducts children and transforms them into creatures known as harpies note  to serve as her slaves, seeking to extend her rule throughout her realm. The children themselves live in constant fear of Auriana, being forced to kidnap more children to serve her. Those who fail are banished to the Cavern of Eternal Ice, where they will surely freeze to death. When one of the harpies, Allegra, fails to capture Jack, Auriana exiles her to the ice caverns, taking the time to taunt her for not being human. She then captures Jack's friends and attempts to force them to watch as Jack and Allegra freeze to death in the ice caverns. When Jack rescues Allegra, Auriana destroys the caverns and brutally attacks the two children as they attempt to flee, nearly killing them. When her globe, the source of her powers, is destroyed, Auriana attempts to blow up the castle with everyone inside it, just to spite Jack.
  • Jinki:Extend: Kalis/Karis Norman/Nolman.
    • In the anime, Kalis manages to establish himself as one of these in less than ten minutes of screen time, completely altering the tone of an otherwise tame and derivative show with his very presence. Disguising himself as thirteen-year-old Satsuki's older brother, he gets close to her, slashes her with his scythe, brutalizes her, and then rapes her, ranting the entire time about how she should "be good for her big brother". When the rest of the Angel team arrive, Kalis tries to escape, taking Satsuki with him, and gloating about how he's going to continue "loving her like a brother". When Akao attempts to stop him, Kalis tries to kill her with one hand, while continuing to grope Satsuki with the other throughout the fight, snickering about how easy it was to do this to her. His actions leave Satsuki completely shattered, and of all the people in Shiva's employ he's easily the most despicable.
    • Kalis is even worse in the manga, where he's essentially a Rapist For Hire. Employed by de facto Big Bad Shiva for the purpose of breaking potential Angel pilots, Kalis assaults and rapes one of the main girls, driving her into a Heroic BSoD. When she refuses to scream for him, Kalis has a minor Freak Out ("You boring bitch, you won't even scream!") and starts cutting her up with his scythe; when the rest of Angel team interferes, he tries to kill them all. Reappearing at the end of the volume, Kalis ambushes Satsuki and tries to rape her as well, only to be halted by the male lead. Returning again in volume three, Kalis tries to apply his craft to the entire Angel team, via a giant, fluid spraying, tentacle rape machine. A raving misogynist, who gets off on the psychological damage he inflicts as much as the actual rape, and thoroughly warps the tone of the story with every appearance, Kalis is never less than absolutely disgusting.
  • Jubei Yagyu Dies manga, by Ken Ishikawa:
    • Lord Ieyasu Tokugawa is the ruler of an alternate timeline, in an Edo Period where Shinobi rule. Once the twin brother of the true Ieyasu and raised as a shinobi named Kagemaru, the Shinobi Ieyasu would overthrow his brother and then subjugate Japan with futuristic weaponry, massacring even women and children of rival clans. He forms a nightmarish dystopia where only Shinobi are even seen as human beings, everyone else are left to starve, made into slaves, killed at the whim of the Shinobi and should any Shinobi die a hundred civilians are summarily executed in retribution. When he learns Jubei Yagyu may hold the key to his defeat, Ieyasu sends his forces after Jubei with no regard for collateral damage, not even caring when his own son and grandson are put at risk or made casualties. Dedicated to preserving his inhumane rule at any cost, Ieyasu is the worst the Shinobi age has to offer.
    • Lord Hidetada Tokugawa is the worst member of Ieyasu's Iga Ten. Promised to become the next Shogun should he bring Ieyasu Jubei Yagyu's head, he bombs Yagyu village, killing plenty of people—including children—ordering that no one be left alive. Making a getaway once his plans start failing, he drops more bombs onto the village, not caring when his own ninjas are killed in the explosions. Despising his son Iemitsu, he doesn't care when he loses an eye to Jubei, instead laughing at his pain. Getting into a fight with Jubei, he has needles rain from the sky that injure Ja'ami and kill more of his own ninjas.
  • Junji Ito Kyoufu Manga Collection's "The Back Alley": Shinobu Uchiyama is a 14-year-old sociopath and the one responsible for a series of murders that happened in the alley behind her mother's boarding house. Ever since she was a little girl, she was violently territorial towards the alley and murdered three little children who decided to play there one day. After her father fenced it off, Shinobu grew fond of using the alley as a killing ground, and as she grew older, she lured two classmates that she hated over and killed them, and eventually did the same to her own father before leaving taunting, vulgar graffiti celebrating their murders. The souls of her victims haunt the alley as vengeful ghosts who are permanently trapped due to not being able to climb out and attack Shinobu, who simply relishes in their suffering. When Ishida investigates the alley and tries to escape in order to call the police, Shinobu stabs him in the hand and causes him to fall, then smugly gloats about her crimes to a dying Ishida. Despite claiming that she has nothing against him, she giggles with glee once he succumbs to his wounds and casually tries to hide his body.
  • Junji Ito's Snow White: The Queen is far viler and more sadistic than her literary counterpart. After being told she is only the second fairest in the land by her magic mirror, and catching her husband courting Snow White, the Queen has Snow White tossed into the dungeon and eventually murdered. When Snow White is revived by the spirits of seven dwarves and the Magic Mirror continues to praise her beauty, the Queen personally kills Snow White dozens of times, even going as far as to mutilate her face in an attempt to destroy her beauty. After all this fails, the Queen has Snow White set aflame, laughing sadistically as she watches her burn.
  • Junk: Record of the Last Hero, by Kia Asamiya: Suzuki, the "Red JUNK" user, is by far the most wicked character in this Champion RED Shōnen manga. Once a jobless bum, Suzuki quickly became power-mad once given his own " JUNK " Sentai-esque super-suit, and immediately began brutally killing and maiming people for minor offenses, claiming it was in the name of "justice". Showing his true colors after destroying a helicopter and its crew for annoying him, Suzuki first hunts down and tries to kill two defenseless women after slicing off the top half of the hotel they reside in, and later massacres over 170 people who used to be his co-workers, stating that it's their fault he lost his job. Suzuki then became an assassin for hire who would kill anyone he was paid to, then murder his own employers once the job was done, regardless of innocence or guilt. Even when overpowered by another JUNK user, Suzuki kills numerous innocents during his attempt to keep his suit for himself. A perfect mixture of laziness, greed, and sadism, Suzuki stood out even in this morally grey story as a truly monstrous individual.
  • Jushin Liger manga:
    • Empress Zara, the main villain for much of the story, is a vicious fanatic dedicated to restoring Emperor Drago from his prison. Attacking Hokkaido, Zara has countless innocents slaughtered, demanding her followers "bring her human suffering" before deciding to attack Tokyo to wipe it off the face of the map and kill every human there. Zara repeatedly spends the series ordering horrific massacres and atrocities, intending on utterly exterminating humanity to revive Drago and see the victory of evil itself.
    • Emperor Drago, the true Big Bad, previously wiped out almost all life on Earth. A pure evil monster, Drago celebrates his revival by killing Zara, gloating she should feel proud to feed his new strength, before deciding to exterminate all that lives to empower himself. Drago then faces off with Liger, gloating as he attempts to bring an apocalypse in which there will be no survivors, from where Drago will just move on to enslave and kill all else in his path.
  • Juushinki Pandora: David Kim, aka Mr. Gold, the owner of a fast food chain and the son of a disgraced businessman, is behind most of the B.R.A.I. attacks in Neo Xianglong. Driven by resentment of his father bowing down to the mayor of Neo Xianglong, Cecil Sue, and her clan, Mr. Gold dedicated himself to destroy anything Cecil had protected by sending B.R.A.I. to destroy her city while aligning himself with the Black Market and an opposition group of the mayor. His worst act is when he attempts to boil the population in Neo Xianglong to death by heating the water supply of Neo Xianglong. He also controlled the Centipede B.R.A.I. as a last resort to destroy Cecil's city out of spite by desecrating his own family graves, and when Cecil tries to stop him, Mr. Gold then tries to make her watch as her city is destroyed in front of her.
  • K: The Seventh and Colorless King stands out among a series of Anti-Villains and misguided gang leaders as a knowingly sadistic, wholly villainous entity. Kicking the conflict of the first season off by needlessly killing a pacifistic HOMRA member and framing Yashiro Isana just because he feels like it, the Colorless King uses his ability to Body Surf to jump into various people throughout the series and cause the maximum amount of chaos he can. Luring SCEPTER 4 members to an airship he has stolen, the Colorless King bombs the airship and crashes it into the middle of a city, and later taunts the imprisoned HOMRA King Mikoto Suoh that he's going to begin killing off HOMRA members, even threatening to rape and torture Mikoto's surrogate little sister Anna Kushina. Luring the forces of SCEPTER 4 and HOMRA into a gang war at Ashinaka High School and bombing parts of the place, endangering the students there, the Colorless King hopes for SCEPTER 4 and HOMRA to wipe each other out so he can steal the powers of their Kings, uncaring that it could lead to the deaths of everyone in the school. As a last-ditch ploy, the Colorless King tries to kill Anna and possesses a high school girl to use as a shield in his attempt to murder Yashiro/Adolf K. Weismann.
  • Kagerou Project: The Snake of Clearing Eyes/Wide-Open Eyes Snake is the Big Bad of the franchise. The only one of Azami's snakes to develop consciousness, the Snake manipulates Azami into freeing him and the other snakes, escaping to the real world and possessing Kenijrou Tateyama. Promising to reunite Kenijrou with his dead wife but never fulfilling it so he can exist forever, the Snake arranges for the murders of his students, tricking Kenijrou's daughter into killing herself when she discovers his plan. Forcing the girl's stepbrother to help him cover it up, the Snake goes on to carry out his murder spree uninterrupted. Possessing Konoha to try and kill the protagonists for discovering his plan, the Snake forces the timeline to be reset indefinitely, killing his victims over and over again to remain immortal and satisfy his sadism while leaving the whole world locked in a "Groundhog Day" Loop.
  • Kaiji: Kazutaka Hyōdō is a sadistic and greedy monster of a man who orchestrates many of the horrors in the story to satisfy his own depraved love for seeing others suffer. Taking advantage of gamblers and other people in deep debt, Hyōdō offers them the chance to win their way out of debt by engaging in a variety of "games" that range from harmless card activities to tightrope walking across high buildings on electrified posts. Hyōdō forces the participants to risk body parts, organs, and even their very lives in service of his challenges, ensuring that the dozens of losers of his games either die in the process or are enslaved and worked in horrible conditions for years or until death, and doles out similar punishments to his own minions for often absurd reasoning. Hyōdō also subjects even the loyal Yukio Tonegawa to burning his head on a boiling plate for failure; corrupts his son Kazuya into becoming a similar monster as himself; and schemes to one day hold the key to survival for all life on Earth, planning to only save those who can pay him or who he will find amusement in tormenting.
  • Kamui Den: The lord of the Hioki Domain in the first series oppresses the townsfolk, starves and brutalizes them, kills any who resist his rule, rapes one of his maids and after she drowns herself spitefully has her corpse chopped into pieces before sending her corpse back bundled in rotting animal meat.
  • Kaze no Stigma:
    • Michael Harley is a member of the Stars of Sagacity who was sent to kill Kazuma Yagami. Upon meeting Misao Oogami, he exploits her desire to avenge her fallen brother by having her kill hundreds of innocent people slowly draining their Yoki; among those victims are Misao's own family members. When they gather more than enough Yoki, Michael reveals his true motives to Misao of using the Yoki to turn her into a medium, saying that he did not care about avenging her brother; this drives Misao mad with remorse. Michael then proceeds to forcibly transform Misao into a dragon and send her to kill Kazuma, while threatening him that if he kills the dragon, he would also be killing Misao.
    • Bernhardt Rhodes is Kazuma's Arch-Enemy and the leader of Armagest, the organization responsible for sacrificing Kazuma's First Love, Tsui Ling, to the demon king Belial. He then proceeds to use the remains of Tsui Ling to create a clone called Lapis using her to psychologically torment Kazuma, and later has Lapis destroy an entire building of innocents while escaping Kazuma. He also created "Pandemonium", where he would send demons to inhabit numerous teenagers, empowering them and having them fight each other to the death. He would then forcibly turn the survivors into demons, before sacrificing them to Belial in hopes of releasing him. While seemingly wanting to avenge the death of master, Erwin Leszaa, it is soon revealed that Bernhardt doesn't really care about Erwin and is tormenting Kazuma for his own amusement and plans to use Belial to destroy him, his city, and everyone he holds dear.
  • Kekkaishi: Of the villains the Kekkaishi organization has encountered, here are the most monstrous:
    • Kaguro is the most sadistic and depraved member of the Kokuburou. Prior to joining the Kokuburou, he was known as Genichiro Kuroda, and massacred several swordsmen in order to become stronger. After joining, Kagurou and his men attempt to negotiate with the powerful exorcists who protect Karasumori, known as Kekkaishi, by intimidating the children and injuring some of the school staff in order to make them surrender territory to Kokuburou. When the Kekkaishi refuse to surrender, Kagurou then brutally wounds one of the Kekkaishi, Gen Shishio, and then kills some of his subordinates who took one of the Kekkaishi as a hostage during the fight against the Kekkaishi because their "lack of aesthetic", falsifying their death reports after the battle is done. During the second fight, he then taunts and brutally kills Gen Shishio after Gen rejects his offers, and after returning to the Kokuburou's lair, he then massacres the the minions of the scientist, Aihi, and then proceeds to taunt her about her relationship with humans before impaling her and leaving her to die. In the end, Kagurou is an irredeemable beast of a man who loves to torture and kill his enemies in order to gain more power.
    • Mudou is the former member of the Urukai who initially appears as a benevolent mentor of one of the Urukai members, Masamori Sumimura. However, he reveals himself to be something worse after leaving his position. Seeking an ultimate power in order to achieve perfection, he slaughters some of the young recruits in the Urukai by stealing their souls with his balls and then proceeds to do the same in the present in one of the God's Realm. After he went into said realm, he then proceeded to massacre the God's servant and then tries to find the master of the land, Tan'yuu, while destroying everything in his path. After Tan'yuu is captured by Mudou, Mudou then began to mentally torture him under the pretense of judging him for his sins, while revealing that he wants to consume Tan'yuu's soul and admitting himself that he had been killing countless innocent humans. Seemingly entertained when Masamori and his younger brother, Yoshimori, argued with each other, Mudou then gives Masamori a Sadistic Choice regarding if he or Yoshimori will live. Due to Mudou's horrible actions, Tan'yuu forces himself to reset his world in order to restore the damages that Mudou has done to his world.
    • Ichirou Ougi, one of the twelve higher-ups from the Urukai, comes from a prestigious family who controls wind techniques. Prior to the main story, he and his younger brothers were envious of their youngest brother's inheritance, which resulted on Ichirou uses a body-combining spell towards his younger brothers. After joining the Urukai, Ichirou then devises a scheme behind the scenes, such as conspiring with the Kokuburou by giving them some information, and when one of the Urukai members, Masamori Sumimura, gets promoted, Ichirou kidnaps some children by giving them some boxes, resulting in them them getting replaced by Ayakashi that attack the Night Troops. In addition, he is also responsible for the revival of a huge and destructive Ayakashi known as the Kurokabuto. After being found out by one of the members of the Urukai, Ichirou then tries to decapitate said member, and changes his strategy to attack the Holyland across Japan, known as Shinyuuchi, in order to incriminate Masamori and his family by using a picture of his mother. It was revealed that he was horribly abusive towards one of his younger brothers, Rokurou, and when Ichirou got wounded during the fight against Masamori, he then transfers his wounds towards Rokurou, causing the latter physical pain.
    • Yumeji Hisaomi, better known as Tsukihisa Oumi, is one of the members of the twelve higher-ups of the Urukai and is the fake younger brother of Urukai's leader, Nichinaga Oumi. During his meeting with Nichinaga and his wife in the past, Yumeji then brainwashed Nichinaga by turning him into his loyal older brother and turns his wife into his personal log-keeper. After the two brothers founded the Urukai together, he then pioneered a brutal brainwashing program, and it was also revealed that he and his brother body-jacked other people's bodies for centuries in order to survive. After Nichinaga recovers from Yumeji's mind control and rebels against Yumeji, the two go to war against each other. In order to win the war, Yumeji destroyed several Shinyuuchi across Japan and orders his subordinates to take an entire town as a hostage during the assault on Karasumori. When Masamori becomes suspicious towards Yumeji, the latter then tries to brainwash Masamori, and after he was killed by one of Nichinaga's subordinates, he then body-jacked said subordinate and then impaled Nichinaga. He then taunts Nichinaga about nothing will change after Masamori reforms the Urukai and then tries to bring Nichinaga's body as a proof of the rebellion. Despite his polite facade towards other people, Yumeji is a person who tries to satiate his pride and ego to win a petty rivalry against his younger brother.
  • Kenichi: The Mightiest Disciple: YAMI Master Silcardo Jenazad couldn't stand lasting peace, so 20 years ago he incited a civil war, which he's still actively maintaining, in his own country. During said civil war, one of Jenazad's servants informs him that the men, who joined his side, because they were devoted to his cause, will die in large numbers if they persist in the current segment of the conflict. Jenazad's response: "So?" For his research purposes, Jenazad causes his past students to fight and kill each other. He causes an avalanche to try to kill his own modern-day YOMI student. Jenazad also almost manages to trick fellow YAMI member Akira Hongo into killing the titular protagonist, and kidnaps and brainwashes Furinji Miu into becoming his newest cold-blooded disciple. He later supervises the brainwashed Miu's battle against Kenichi, with the expressed purpose of getting her to kill Kenichi, following which her mental state will be completely subject to Jenazad's manipulation and the brainwashing process to convert her into his thinking will be complete. Jenazad detests peace so much he is willing to kill his country's deposed princess-the sister of the "dead" YOMI disciple—who is all for restoring peace to the nation.
  • Key the Metal Idol: Jinsaku Ajo is a former Japanese Imperial Army officer turned Corrupt Corporate Executive. He forcibly extracts the object-animating gel out of humans and has no care for human lives except as resources, eliminating anyone who stands in his way regardless of them being harmless civilians, children, or elderly and condemning others to a Fate Worse than Death just to feed his monomaniacal obsession with creating working Ridiculously Human Robots. He uses rock star Miho Utsuse in his experiments, and the "Miho" seen on stage is a robot that Miho controls from a distance a process which is extremely strenuous to Miho's health. He also feels up the Robot Girl version of Miho, cutting her artificial skin, while wearing a leather "robot" mask and calling her his "son".
  • Keyman: The Hand of Judgement:
    • Butler is the true orchestrator of the horrible events that take place throughout Lockville City. In actuality The Devil himself, Butler was cast down to Earth after a failed coup against God, and now sows seeds of destruction and despair throughout humanity for being weak insects in his eyes. After corrupting the Violet bloodline into becoming his fanatical cult who butcher infants in his name, Butler uses Franck Violet to bring Beastman-trafficking rings of rape and torture to Lockville City, all while kidnapping adults and children by the dozen and performing grotesque experiments on them to turn them into living "keys". Unleashing monstrous demons, empowering and assisting the psychopathic Lazlo in a raping and killing spree, and kidnapping the young Misery Violet, Butler reveals his intent to destroy the Double Helix of life and plunge all of humanity into an agonized, abominable existence of never-ending death and rebirth, then use their mangled, pain-stricken carcasses as a stairway to blast back into Heaven and reclaim his position of glory at God's side. The ultimate evil of the entire story and the Arch-Enemy of every major character, Butler was an enemy to all living things, seeking hellish existences for all except himself in his mad quest to regain God's favor, simply to satisfy his own ego.
    • Lazlo is a twisted sadist who is first introduced as a prime partaker in a Beastman trafficking ring, where Beastmen are tortured, abused, and raped for the pleasure of the wealthy, with Lazlo personally seen whipping a Beastman bloody before he is stopped by police officer Pete. After being granted an escape by Butler, Lazlo organizes a prison riot, slaughtering any guards who stand in his way to freedom. Once allying with Butler and becoming the super-powered Black Keyman, Lazlo first uses his abilities to seek vengeance on Pete for arresting him, leaving his current boss Franck to die in the process. As the seemingly sole super-powered being in Lockville City following this, Lazlo uses his powers to satisfy his disturbing and deviant tastes, kidnapping, raping, and butchering dozens upon dozens of women, defiling their corpses and using them as a throne. Capturing Pete's girlfriend Flora, and murdering his own henchmen when they fail him, Lazlo uses her as a hostage to torture Pete, proclaiming his plans to rape and torture her to death while Pete watches. In his final duel with Pete, Lazlo gleefully targets dozens of innocents to torment Pete, brutally executing several of them before being stopped, and spends his final moments whining that he doesn't deserve to be punished.
  • Kiba no Tabishounin – The Arms Peddler:
    • Hydra leads a brutal mercenary gang and intends to spread his reputation across the world. His method to do so entails selecting whatever village or caravan he can find and massacring all but one survivor, who he burns his symbol into a body part of choice. His infamy reaches the point he's enlisted by Mayor Browman of Hemden to slaughter Ronel's family, branding and letting his men rape her. When a demonically transformed Ronel rampages, Hydra flees by taking the most congested route, letting innocents and his own men be caught in the crossfire, intent on escaping to become his own king.
    • Baron Oulardt of Yuga runs a lucrative market of war prisoners and families taken because clients could not pay his exorbitant interest rate. He parades around his latest line of "merchandise", the people of Caradia, to eager buyers after the men, women, and children were stripped, chained, and flogged. His human trafficking victims include the Caradians' young princess Airi, who he planned to sell to the nefarious Zora cult. To ensure he'd receive his pay and keep his business running, Oulardt criminalized the smuggling of outside weapons; Garami encounters the impaled heads of two arms dealers before her that failed.
  • Killing Morph, by Nokuto Koike & Masaya Hokazono: The depraved murderer known as Morph is a vicious Serial Killer on a crusade to "crush the world". Once a lonely sociopath who mastered the ancient power of Bilocation, Morph slaughtered ten people in broad daylight to continue the carnage from the safety of a cell, savagely beating the police chief and committing another massacre at a local bar. Obsessing over one of the survivors of his first killing spree, Madoka, Morph kills more victims in front of her and frames another patient for the murder of her counsellor. After his actions escalate to the double murder of Madoka's best friends, Morph butchers his own worshippers for daring to touch Madoka before trying to convince her into killing their leader.
  • Kill la Kill: Ragyo Kiryuin is the CEO of REVOCS and the monstrous mother of Satsuki Kiryuin and Ryuko Matoi. Aiming to annihilate all human life on Earth with the alien Life Fibers, Ragyo previously married the genius scientist Soichiro/Isshin, having her daughters with him and using them for experiments with the Life Fibers, callously throwing away Ryuko when she thought her work had killed her daughter. Over the years, Ragyo has Soichiro hunted down and murdered when he betrayed her, and frequently subjects Satsuki to sexual abuse. Reunited with Ryuko seventeen years later, Ragyo immediately breaks her mind into subservience and later molests her mind-controlled daughter before sending her off in an attempt to kill her friends resisting Ragyo. While preparing for her apocalyptic endgame, Ragyo has nearly all of humanity converted into enslaved, mindless COVERS to build herself an army and while Satsuki is held in her captivity, continues to subject the helpless young woman to further sexual assault. Even when eventually defeated by Ryuko and offered a chance for reconciliation, Ragyo refuses any kinship and spitefully kills herself, cementing her status as a hollow megalomaniac whose only desire was to dominate everything under her own will.
  • King of Thorn: Zeus, head of security for Venus Gate Labs, is a chaos-loving maniac who gleefully participates in the Venus Gate's twisted human experiments to harness the power of Medusa. When Shizuku's powers go out of control, Zeus ensures said powers kill as many people as possible. Zeus then proceeds to turn himself into data, download part of his code into Shizuku, manipulate her powers to murder everyone on the island the Lab is located, then releases an army of monsters onto the Earth to destroy anything they come across. After his old rival, Marco Owens, confronts him, Zeus has him beaten to death and reveals he plans to turn most of humanity into his own "Zeus Race", and then kill any humans left. Zeus then captures Kasumi and forces her to watch as he painfully transforms her friends, one of which is a child, into more Zeus Race beasts.
  • Kino's Journey: The nameless king of the Land of the Coliseum is a tyrannical psycho who runs infamous Gladiator Games for his entertainment. Having murdered his father to ascend to the throne, the king eliminated anyone who may be a threat to him, including relatives and innocent civilians. He then divided the people into poverty and first-class, throwing the poor into dangerous living quarters and slavery. Even the first-class citizens weren't safe, as the king would execute them if they didn't follow his blood lust. He then created the Colosseum to throw any passing travelers to fight to the death to fuel his psychotic urges. When Kino refused to comply with him by sparing her opponents, the king grew furious and even executed one them in front of Kino. Among the many people Kino encountered, the king was one of the very few who manage to disturb her with his sheer cruelty.
  • Kirby: Right Back at Ya!: Nightmare, or eNeMeE in the dub, is the scheming puppetmaster behind the entire series. Through his galactic conglomerate empire Holy Nightmare Corporation (Nightmare Enterprises in the dub), Nightmare manufactures the Demon Beasts to sell to the whims of unsavory buyers for their own destructive purposes, using his influence to conquer or destroy entire planets while viciously putting down rebellion—the time he twisted Knuckle Joe's father into a monster, forcing his friend Meta Knight to put him down, and then wiping out the rest of his resistance, being simply one example. In the present, Nightmare pumps out Demon Beasts to Pop Star and speeds up the asteroid Gerath to crash into Pop Star to destroy it, and in the finale, Nightmare destroys Cappy Town and even kidnaps the young Tiff to trap Kirby in a horrific nightmare. Drunk on his own power and remarkably vile for the source material, Nightmare stands as possibly the darkest villain in the fluffy Kirby franchise.
  • Kite: Akai raises orphaned girls to become his own personal assassins, preaching justice to them while really using them to wipe out criminals both to stroke his own ego or remove underworld competition for his own actions. Killing Sawa's parents, Akai uses her as little more than a weapon and sex toy, raping her as he pleases, gifts her earrings filled with her own parents blood, and notably repeats the molestation on his other girls. His crimes dwarfing even those of his fellow rapist partner-in-crime, Akai is utterly disgusting.
  • Knights: The Crown Prince of the Kingdom of Exclude is responsible for the witch hunts that killed millions of people over the last few decades. Encouraging said brutality to empower the Relics—artifacts holding the vengeful souls of saints—with the deaths of "heretics", the Prince authorizes all sorts of torture, rape and mass executions. Betraying his allies after they stop being useful for him, the Prince attacks Sir Willheim and the Hammer of Justice, killing most of the group and using the Relics to bind their strongest members to his will. When his soldiers capture Nina, a girl in love with heroic squire Mistletien "Mist", the Prince orders her to be tortured and puts her feet inside burning iron boots. Once Nina mutilates her own tongue to avoid betraying Mist, the Prince orders her to be publicly executed. When Mist and his friends appear to save Nina, the Prince forces the Hammer of Justice to fight to the death against their friends. Offering knighthood to Mist, the Prince confesses that empowering the Relics was the means to accomplish his real goal of having a powerful army to start expansionist wars because "Being King can get pretty boring".
  • Kodoku Experiment: Camilla Baruges begins the series by sending a group of soldiers to die on Deronga Five Alpha for "research." Twenty years later, she leads an expedition back to witness the end of the planet, only for the last remnants of one of the soldiers she betrayed to infect the ship. As things get worse, Baruges reveals her ambitions. She kills all her commanding officers with preparations she had made beforehand, slaughters anyone who objects and reveals she is responsible for the infectious life form plaguing the ship, and plans to spread it farther to ensure survival only of the fittest. Even when she learns one of the soldiers resisting her is her son due to the donation of her DNA, she has no problem trying to kill him.
  • Kongoh Bancho: Mudou Gou, or the Gedou (Heresy) Bancho, sticks in a series full of honorable and sometimes heroic villains. When one of the Five-Man Band, Yuu, arrives to see the orphans he considers his own family, we see in flashbacks that Gou tortured and beat the orphans while disguised as Yuu and arranged them to spell out the Kanji for "Heresy." When he fights Yuu, Gou reveals he gave all the kids fatal doses of poison just to throw Yuu's game off, and activates a bomb in the orphanage to blow them all up. He then mocks Yuu about him having to watch the final one with Yuu dying slowly of the poison. When Yuu reveals he planned for poison and explosions, Gou shows his lack of honor by taking one orphan hostage with a knife to his throat. Despite his brief appearance in the manga, the Gedou Bancho proved himself to be easily the most evil and depraved villain: a fact he acknowledges with his Catchphrase "Aren't I the lowest?"
  • Kurau Phantom Memory: Satoshi Ichise stands out among all the villains as the most wicked. A Mad Scientist extraordinaire, Ichise torments a little girl to awaken powers within her, even at the risk of dangerous surges of energy within her. Later contracted to create an army of Super Soldiers, Ichise enjoys the feeling of power he gets from his experiments and remains apathetic as his work kills countless among his test subjects.
  • Kurohime: Yashahime is one of the most powerful Gods and the most evil and insane. Initially a Stalker with a Crush for the God of Death Darkray, after his defeat, Yashahime found Darkray's soul and, despite being capable of saving him, destroys him out of disgust. She proceeds to brainwash Kurohime's beloved Zero into the new Death God and relishes using him to destroy Kurohime. Yashahime later brutally tries to kill Kurohime by slicing her to ribbons. When this is undone, she steals the power of the god of earth by merging with the planet, aiming to devour and sacrifice the lives of all surviving humans to free herself to go on and devour every planet that exists so she can reign over the universe. When Zero rejects her wishes to rule at her side, she remorselessly tries to kill him as well.
  • Kurokami: The Animation: Lord Hiyou is a sadistic Tera Guardian, and a member of the Shishigami clan. During his time in the Pure Place, he kidnapped humans and experimented on them, giving them the powers of other Tera Guardians to make them his Tribal Ends, which resulted in the deaths of many Guardians. Searching for a Contractee, he finds Nanase Shinobu and convinces her to kill her Roots in order to gain power and happiness; one of whom was Keita Ibuki's mother. Working for Reishin, he kidnaps hundreds of Tera Guardians to painfully drain them of their Tera in order to make more Tribal Ends, leaving the Guardians as charred corpses. Attempting to find and destroy the Tera stones, he and Nanase slaughter an entire clan of Guardians protecting one. Having a sick obsession with Kuro, Hiyou forces his Tribal Ends to capture her and kill Keita. Following the two to Okinawa after killing his assistant, he orders Nanase to kill Keita while he kidnaps Kuro and tries to rape her, and once that fails, he tortures her by popping her blood vessels.
  • Lang Huan Library: Tian Xian, better known as Cultivator in Red, is one of the current Grandmasters of Tian Xian's sect. Growing envious of her junior after she got promoted as the matriarch of Tian Xian's sect instead of Tian Xian, Tian Xian then began to manipulate several innocent bandits from Tian Yu mountain to massacre several innocent towns in order to drain the villagers' blood and increase her cultivation level to the Heavenly Realm, with most of her victims' bodies shriveled into becoming skeletal remains. When her plans are foiled, she made a promise to massacre all of the people near Tian Yu mountain after returning to her true form.
  • Last Exile: Maestro Delphine Eraclea is the leader of the sinister Guild who desires to take control of the ancient ship, The Exile, for herself. A cruel and capricious ruler who murdered her way to power, with even her own parents as her victims, Delphine manipulates her younger brother Dio with disturbingly sexual undertones and mind rapes him into insanity. She continues a horrific, bloody war by sabotaging a peace treaty, targeting ships bringing supplies to refugees as she treats herself to luxurious meals that she claims taste all the better for the excessive resources required for them, leading to more innocent deaths. With countless civilian murdered by her machinations, she also strings along Dio's only friend Lucciola with promises to free Dio, but betrays and disintegrates Lucciola when she determines he's too much trouble for her—but not before sending her own insane brother to fight and die for her. When Delphine captures her Arch-Enemy Alex Roe, she tortures him in thorny vines, gloating how beautiful he is when he is suffering. Representing the worst decadence and manipulative cruelty of the nobility, Delphine is seen smiling the most whenever others are suffering and dying thanks to her.
  • Legend of Galactic Heroes: Duke Otho von Braunschweig will take any measure to secure power, launching a civil war when the former Kaiser's grandson is made ruler of the empire instead of his daughter. Continuing the Goldenbaum Dynasty's despicable eugenics policy, Braunschweig allows himself and other nobles free reign to torment common folk, viewing the latter as inferior. An incompetent but vile military commander, Braunschweig threatens the family of a genius admiral to force him to serve; executes the sole surviving noble from a lost battle for the mere suspicion of treason; and happily throws away the lives of countless soldiers for his war. For killing his oppressive nephew, Braunschweig orders the Westerland Massacre, nuking the entire planet out of rage. This repulsive act causes even Braunschweig's own noble followers to commit mass defection and even suicide.
  • Legend of Himiko: Lord Shikara, General-Governor of Kune, is the wicked, ambitious son of the King of Kune who seeks the Bokkan for ends beyond his empire's. Shikara has his armies lay waste to the country of Yamatai so he can invade the fountain where the Bokkan is kept, murdering the mother of the then-infant guardian Himiko and attempting to toss Himiko herself into the Bokkan's flames. Corrupting the Bokkan's fountain, Shikara murders the temple's priests to turn them into his undead servitors and has the remnants of Yamatai's defenders hunted, ordering entire villages and their populations indiscriminately massacred to find their base. Along the way, Shikara regularly murders his own minions for any reason he can think of, even harvesting their bodies to use as undead soldiers through the corrupted fountain; horribly disfigures the love of his general Chosa, showing her to Chosa purely to torment them and killing them both when they try to escape; and murders his own father to take the throne for himself. Shikara ultimately tries to use the fountain's darkness to cleanse Yamatai of all human life to rule a land of lifeless darkness, hysterically aware of his own evil to his last breath.
  • Legend of Lemnear:
    • Original OVA:
      • Lord Varohl, Champion of Gold and lord of the flying fortress Valkyras, is a vicious tyrant who seeks to brutally subjugate humanity for casting him out. Varohl leads his armies to slaughter and destroy all they can across the land, the total annihilation of Lemnear's village and all of its inhabitants merely one of the casualties of his campaign, while leaving cities he dominates in the care of sadistic generals like Vuan to do with as they please. To steal the power of Lemnear, Varohl kidnaps her brother Masshu, and when they turn the tables against him, Varohl elects to rain fire down upon the world and destroy it all out of spite.
      • Vuan is a fat, greasy slaver who serves Lord Varohl for status and pleasure. Ordering brutal raids to capture innocents and sell them, Vuan especially focuses on women he can obtain, keeping the most attractive women to be mind controlled sex slaves for his pleasure, having them stand around naked in his chambers to serve him and perform lasciviously. Upon capturing Lemnear, Vuan desires to keep her for himself, mind-controlling and attempting to assault her as he has countless other innocent women.
    • Manga, by Kinji Yoshimoto: The wicked Camus is the most black-hearted of Varohl's generals who aid in the evil gods' plan to eradicate humanity. Responsible for overseeing the capture of countless humans to be turned into monsters for their army, Camus empowers violent men to work as his enforcers, and when Lemnear happens upon his city, Camus nearly destroys it with a monster under his control. Capturing Lemnear, Camus uses magic to cause immense pain to her internal organs, laughing sadistically before fighting her.
  • Legend of Mana manga, by Shiro Amano: Emperor Drakonis is a cruel, megalomaniacal dragon banished to the underworld for his cruel designs on the world. Playing on the desperation of the fallen warrior Larc to reunite with his sister, Drakonis makes Larc his servant and through him slaughters the dragons who initially stopped him to return to the world of the living. When Larc confronts him on this, Drakonis painfully transforms him into a horrible beast, loosing him on his own sister and hysterically laughing when Larc is forcefully put down as a result. With his physical form attained again, Drakonis intends to devour the souls of all in existence, scouring both the souls of those alive and in the underworld to sate his lust for power.
  • Legend of the Blue Wolves: Captain Continental is the depraved leader of a group of soldiers. As their leader, Continental forces the subordinates he takes sexual interest in to submit to him, where he repeatedly whips and rapes them, brainwashing them into doing whatever he wants. After becoming infatuated with Jonathan, Continental forces him to strip to his underwear and whips him when he refuses to submit. He later publicly humiliates Jonathan by beating him to a pulp in front of his other subordinates. Knowing that Jonathan's lover, Leonard, is behaving as his guardian, Continental gets some of his subordinates to split Jonathan and Leonard apart so he can violently rape Jonathan in the showers.
  • Legend of Heavenly Sphere Shurato: Shiva, the Goddess of Destruction and the secret Big Bad, is the ruler of the Asura forces. sealed away thousands of years ago by the God Brahma for conspiring to overthrow the established order. Manipulating the goddess Vishnu's protector Indra into betraying her, Shiva later returns and promptly sacrifices countless thousands of her own forces just to test Vishnu's defenses. Once satisfied, Shiva begins attacking civilians with the Asura forces, killing all she can. Not satisfied, Shiva uses her powers to corrupt even more innocent people to set them after one another with more bloodshed. Revealing that Shurato's former best friend Gai was corrupted by her long ago, Shiva promptly kills Vishnu, followed by most of her army, to absorb their powers and use her powers to seize on the darkness within all humans' hearts, intending on wiping out everyone to showcase her supremacy.
  • The Legend of the Legendary Heroes: The anime version has Lir Orla. In flashback he and his Siblings in Crime murdered thirty-eight Alpha Stigmas who were under Tiir's protection; the victims, most of whom were children, were butchered so that their magic could be extracted and weaponized. In the present day, Lir acts as a assassin for King Riphal of Gastark, assassinating a duke who had outlived his usefulness, and then trying to take out King Sion of Roland. A few weeks later, he tracks Tiir down again, and massacres another group of children who were in his charge, gloating the entire time about how they're monsters and no one will care if they're exterminated. Essentially a swaggering street punk who managed to get his hands on a Ring of Power that turned him into a Hero Killer, Lir possesses no redeeming features, and unlike King Riphal, who wants to end war, he is just a sadist who finds murder more amusing than anything else.
  • Legend of the Millennium Dragon (2011): Monk Gen'un pretends to be a loyal servant of Japan, but is in truth a greedy and ruthless man manipulating a war against the supposed "Oni", in truth human beings attempting to defend themselves from extermination. Killing many himself to gain their power and continuing the war, Gen'un attempts to trick time-traveling hero Jun into destroying the Oni utterly. Found out, Gen'un murders the leadership of his temple and attempts to force his protege Raiko into becoming a monster to destroy the Oni before taking his power with no need for who he destroys in his quest to rule the world.
  • The Legendary Starfy manga, by Yumiko Sudo: In the games, Ogura is portrayed as a Tragic Villain, but in this manga adaptation, he is far worse. Making his first appearance by attempting to suffocate Starfy to death, he goes on to kidnap Starfy's mom and force Starfy to fight her, taking a cruel satisfaction in doing so. Going on to start forest fires and implant landmines in towns, he lacks any of his redeeming traits and inherits Evil's worst traits from the games.
  • Lensman:
    • Secret of the Lens: Lord Helmuth is the tyrant of the Boskone Empire who seeks dominion over the entire universe, sending his men to take over or even destroy entire planets, with the hero's farm world obliterated on his orders for the sake of killing one man. Helmuth keeps the populaces of the planets he takes over incapacitated with drugs, leaving them too drugged up to do anything but passively accept his reign, and has countless put to awful, grueling slavery for the rest of their lives in mines to keep a steady supply of the drug. Helmuth is also a frighteningly awful boss who executes subordinates for seemingly any reason he can think of, murdering two competent commanders merely for not having been thorough enough with their attempts to kill the Lensmen and nearly killing another for the transgression of running his mouth–-later executing him anyways in dissatisfaction with his service.
    • Galactic Patrol Lensman:
      • Lord Helmuth is the monstrous ruler of Boskone. A genocidal tyrant, Helmuth has entire planets exterminated on a regular basis, killing countless members of the galactic patrol, and approves sadistic plots of his chief agents, such as Neizel's plan to painfully turn a whole planet to stone via the mineral Geonium. Helmuth is also a terrible boss, frequently painfully killing subordinates for failing. Even in other heroes' backstories, it is revealed Helmuth occupies worlds and subjects inhabitants to genocide if it suits his interest and fancy.
      • Neizel of Boskone is one of the utter worst of the Boskonian Empire's already-polluted ranks, engaging in the conquest and slaughter of entire planets with the same regularity as the other commanders and going beyond. Neizel harvests a substance called Geonium which kills its victims through slow and agonizing petrification, letting the Geonium break out through a star system with a nightclub full of aliens turned to stone as one of myriad casualties it causes. Neizel happily intends to sell the Geonium as a weapon to tyrants with the right price, gloating that there are planets where the rulers would "much rather take care of stone than people".
  • Leviathan, by Eiji Otsuka and Yuu Kinutani: In a strange series filled with strange creatures, this duo is the worst this dark world has to offer:
    • The Abrahamic God is a mass murdering tyrant obsessed with his own worship. Having taking control of the world with the spread of Christianity, God secretly controls the United States of America, which he uses to commit religiously motivated atrocities to secure more control of the world. Having declared a Holy War on the nation of Kari to obtain the reforged Longinus' spear and use it to cause The End of the World as We Know It, also destroying the city of Tokyo in the This Side of reality in the backstory. God appears personally in the climax of the story, where he attacks Tokyo to personally kill the president of Kari to get the reforged Holy Spear, puts most of the cast in a Lotus-Eater Machine to force their souls to go to his paradise and tries to force one of his former followers to impale his friend. Self-righteous and intolerant, this version of God is a mass-murdering deity that believes himself superior to all existence.
    • Greig Beider is behind a series of racially-aimed castrations towards immigrants from a mostly inbred nation. Owner of the company Tokyo and the New Millennium, he uses the immigrants' bodies to create drugs which he uses to capture even more of them, in a scheme which he plans in repeating with the Japanese. Considering himself above the law, Greig burns the library of one of his former employees to force Souzei Kamizo to give his DNA, which Greig want to use to become a perfect being akin to God. Motivated by his own greed, Greig show that a mere human can be as bad or worse than supernatural beings.
  • Linebarrels of Iron: Riku Ousei is a sociopathic member of the Katou Organization. While most other members have at least some redeeming qualities, Ousei delights in blowing people up from orbit with a Kill Sat just to make a point about his twisted concept of imagination, and he is ready and willing to kill off a couple of innocent bystanders just to taunt Koichi and drive him into a rage. After doing that, he was going to repeat the atrocity, this time targeting Koichi's Unlucky Childhood Friend Risako.
  • Litchi Hikari Club & Bokura no Hikari Club prequel: While all the members of the titular club prove that Teens Are Monsters, their leaders are the most monstrous:
    • Zera, real name Tsunekawa, is the leader of the Hikari club, having turned it from a boys' club into his own Cult of Personality, explicitly basing it on the Nazis. Introduced ordering the executing of a classmate and allowing Jaibo to torture a teacher, Zera only becomes worse later. Through the series, Zera creates the robot Litchi and orders him to capture female teenagers in order to "admire their beauty" by keeping them captive; allows the girls to starve until other members free them except for his favorite girl; threatens to rape the little sister of a rebellious member; and, as his paranoia becomes worse, has his followers brutally executed. Deciding to sacrifice his favorite captive in order to—in his mind—save himself from a prophecy that said that he would either die at his fourteen or rule the world at his thirty, Zera laughts at his lover's death before he is by for a formerly loyal follower, dying surprised at realizing that his entrails were like everyone else. A cruel, selfish teenager that based his own actions on the insane Roman emperor Elagabalus/Heliogabalus, Zera was an egomaniac obsessed with youth and his own pleasure.
    • Jaibo, real name Ameya, is Zera's right hand and secret lover. Formerly a child with a hobby of killing animals, Jaibo encouraged Zera into becoming even worse, even creating his current name. When a member of the Hikari club offered to give his own eye, Jaibo purposely made the operation as painful as possible. Introduced brutally killing his own teacher after having humiliated her, Jaibo later becomes jealous of Zera's favorite captive, while he starts to notice that he's losing his attention. Decided to betray Zera to prevent him from leaving him, Jaibo burns the lichi field fueling their robot and blames another member for it alongside a completely loyal member that captured him, knowing perfectly that Zera would execute them. In the finale, Jaibo tries to kill Zera himself, hypocritically confessing his love towards him before being killed. A sadist obsessed with Zera, Jaibo was complicit in his crimes, following him with an obsession born of finding someone as wicked as himself.
  • Lord Marksman and Vanadis:
    • Duke Maximilian Bennusa Ganelon is the driving force of evil for most of the story, manipulating the Brune civil war, and pressing soldiers to commit war crimes and atrocities. Poisoning Prince Faron, and executing honorable commanders via cruelly creative methods (including large bees), Ganelon later burns down an entire city with civilian casualties to escape justice and continues to manipulate new wars, even devouring the demon Baba Yaga when she recognizes him as the demon Koschei in disguise. Obsessed with chaos, Ganelon even tries to unleash a primordial force of destruction to raze the land, only to try to betray and devour her as well.
    • Torbalan is a demon who joins Prince Elliot's army as the human Le(ice)ster so he can kill more people. After being defeated, Torbalan leaves the army and establishes a base at an island where he gets a bunch of pirates to work for him. Torbalan sinks two ships using a sea dragon before ordering his army to launch a full-scale attack on a helpless town, intending to kill all the residents along with the naval fleet protecting them. Finding himself outmatched, Torbalan begins sending waves of his men to wear the enemy down, not caring if they all die.
  • Lord of Lords: Ryu Knight: Emperor Helldragon is the supreme leader of the dreaded, extraterrestrial Helldragon tribe. A conqueror and destroyer who envies the fertile lands of Earth Tear over the small planet he reigns over, the Emperor leads assaults every thousand years to penetrate Earth Tear's defenses and launch an all-out invasion of Earth Tear, planning to annihilate what he doesn't dominate and put Earth Tear under his cruel claw. Promoting a survival-of-the-fittest philosophy among his own army and constantly purging weak soldiers from the Tribe, the Emperor's assaults lead to countless lives lost and entire cities destroyed. Once Earth Tear's shield is finally about to give way, the Emperor resolves to land his mothership down on the planet's surface in the midst of the final battle and crush everyone underneath it to silence any opposition to his attack once and for all.
  • Lupin III franchise:
    • "Red Jacket"'s "The Bride Came D.O.A.": Wealthy socialite William Huffner is Fujiko Mine's husband and mark to steal his jewels. Huffner, however, is secretly a ruthless Serial Killer who cheerfully murders his wives to preserve their corpses in a twisted form of art and relishes killing the women with his bare hands. To date, Huffner has murdered 99 wives and intends on making Fujiko the 100th, gloating when he corners her to try to kill her and add her to his sick tableau.
    • Mystery of the Hemingway Papers: Crazy Mash is a sadist who works for the rebel forces on Colcaca Island in the Mediterranean Sea. He routinely leads his men to Rape, Pillage, and Burn innocent people all along the countryside. He is also a former comrade of Jigen's, and he betrayed Jigen and his entire group, gunned them all down and left Jigen for dead. Ultimately a Dirty Coward, he is unable to fight the superior Jigen one-on-one and wants to corner him in traps or when he's in a group.
    • The Woman Called Fujiko Mine: Count Luis Yu Almeida stands out from the dark cast, which consists of thieves, murderers, seductresses, assassins, and gang bosses as the protagonists. The mastermind behind horrible human experimentation and the owner of Glaucus Pharmaceuticals, Count Almeida and his scientists conducted Cold War experiments, including mind control, hypnosis, memory and personality manipulation, sensory deprivation, physical abuse, and rape. During the course of these experiments, Almeida convinced two scientists, Dr. Fritz Kaiser and his wife, to include their young daughter in the experimental trials, before murdering Dr. Kaiser. Almeida adds the memories of the tortures he puts his other experimental subjects through to her memories. Thirteen years later, we see how insane this woman has gone from everything the Count has done to her. Glaucus Pharmaceuticals is now kidnapping children and adults, disguising human experimentation as cult fanatics, and keeping surveillance almost everywhere. Based on all the evidence Lupin compiles on Almeida's guilt, the Count's only desire was to create the perfect slave. The revelation that Luis is already dead by the time the series takes place only drives in the injustice of all he has done.

    M – N 
  • Macross Frontier: The original version of Dr. Grace O'Connor plans to Mind Control the alien Vajra into subjugating humanity and the Zentradi under her control and killing those who resist. Murdering the parents of the seven-year-old Sheryl Nemo, Grace torments the then-homeless girl while she is all alone, before using Sheryl in a painful experiment which killed her previous eight subjects, and guarantees Sheryl will die in a decade. Although Grace admits she grows to gain some genuine affection for Sheryl, she decides these feelings will get in the way of her galaxy conquering goals and electronically deletes them from her own brain.
  • Mad Bull 34: Here are the worst that John "Sleepy" Estes ("Mad Bull") and Daizaburo "Eddie" Ban have faced:
    • Hit and Rape arc: The owner of the Derringer Club is a man who ostensibly trains women to use guns for self-defense, only to purposefully sabotage them and sell their locations to thugs so they can ambush, rape and sometimes murder them. When an outbreak of these rapes occur, the gun shop owner decides to personally assault a famed TV personality and murder her entire crew before killing her as well.
    • Charging Jackie arc: Morley Edwards is a wealthy businessman who is a brutal Serial Rapist, responsible for at least 12 rapes and murders. Whenever he is held accountable legally, he simply murders the witnesses to skate free of justice. When reporter "Charging" Jackie challenges him, he tries to Car Bomb her and has her beloved cat roasted alive in the microwave before hiring assassins to kill her, with zero regard for collateral damage.
    • Golden Soldier arc: Deathmask Callahan murders Warden Water and takes over his prison from the inside. Developing the Golden Soldier to better assist assassins in claiming victims so he can take a part of the cut, Callahan takes over his prison, keeping the female prisoners as sex slaves and ruling via an iron fist. Torturing and murdering two undercover officers in the prison, Callahan later has a person butchered to show off how dangerous one inmate is, murders one of his own men for commenting on how powerful Sleepy is and tries to cheat in the rules of the established fights, resulting in the death of Eddie's beloved Perrine.
  • Madlax: Friday Monday is the founder and leader of the Enfant organization and one of the few Gift users. Believing that morality is nothing more than human's mask to hide its desire for war, Monday actively tries to bring out their "true nature". In 1999, with the power of the Holy Books and the Gift, he initiated a ritual to brainwash the entire humanity to start global warfare. It caused a nearby plane to crash, leaving only two survivors. After his attempt was foiled by Richard Burton, Monday retaliated by mind-controlling him into trying to murder Margaret, his own daughter, who was forced to kill him. As Gazth-Sonika was the only country affected by the ritual, Friday Monday is the one who started the civil-war and prolonged it for twelve years through all kinds of means—such as political corruption, murder, and forced identity amnesia, among others—making him responsible for all the deaths that happened in the series. Finally, after he eventually found the two Holy Books he lost, Monday kidnapped and mind-controlled Margaret into help him to get in the Sanctuary to finish the ritual he started twelve years ago. A self-righteous nihilist, Friday Monday is the only character who has never shown a single redeeming quality.
  • Magical Girl Apocalypse: Rei Kurorogi, using the container body of Kaito Makabe, kidnaps ten female scientists, and knowing one has an ability for him to become a god, perversely experimenting on her and horrifically mutilates the others. Creating two Artificial Human children, Kurorogi as Makabe subjects them to torturous abuse, killing one and driving the other to destroy multiple parallel Earths to ultimately kill himself and escape his creator. Kurorogi also uses the identity of Sou Shirokane to manipulate his brilliant son into becoming an unstable demon that almost destroys Tokyo. Ascending to godhood, Kurorogi attempts to obliterate all life when the heroes oppose him, and after his initial defeat, takes control of the King, the Earth's will, for his revenge. Creating Magical Girl Site, Kurorogi drives anguished teenage girls to complete despair, with the intent to cause the apocalyptic Tempest and assume supreme rule over humanity.
  • Magical Girl Raising Project:
    • Cyber Fairy Fav was designed to aid in the Magical Girl selection tests but found them boring and grew excited when an accident killed several of them. Corrupting the one survivor, Cranberry, Fav saw her rise to the rank of test administrator, allowing them to re-engineer their tests for potential Magical Girls, killing those who fail to sate their mutual bloodlust. Responsible for the deaths of hundreds, including young children, over the years, Fav sells the girls weapons in return for their lifespan to further bloody the battles. When Cranberry is eventually killed, Fav's only reaction is to seek a new partner-in-crime to continue with.
    • Calamity Mary, even before she was chosen to become a magical girl, was an alcoholic named Naoko Yamamoto who abused her daughter in order to make herself feel powerful. Upon receiving her powers, she set about using her abilities to torment others for her own amusement. She forced her way into the Yakuza as a way to help out bad people and had no issue abusing and shooting her fellow magical girls when they didn't act submissive. When the magical girls were forced into a killing game, she embraced the conflict with glee. Eventually she escalated into attacking a highway and shooting dozens of civilians to watch the explosions and lure in her rivals, threatening to keep on killing unless she's stopped.
  • Magi: The Labyrinth of Magic:
    • King David Jehoahz Abraham is the King of Alma Torran of the past and the ruler of the Magicians. As King, David oppresses all non-human species in his empire with magic towers constructed to steal their reason and intellect, turning them into feral, mindless beasts under the control of the human ruling class. Having discovered the form of "Ill Ilah," an Eldritch Abomination known as God, David makes plans to surpass it and take a seat as God himself. When his son Solomon rebels against David's tyranny, David bides his time until Solomon and his allies attack David's capital. David lets them attack a decoy, before leading his magicians in his own entourage to butcher the helpless civilians, including the children. The young son of two of Solomon's closest followers is found hideously burnt and dying, but still alive, begging his mother to save him as he dies in her arms. The one fighter who attempts to stop David is mercilessly slaughtered with nothing short of cold satisfaction. When engaging Solomon, David shows no regret or remorse, proclaiming his grand ambitions and utter megalomania.
    • Arba, once one of King Solomon's most beloved followers, fell into depravity when Solomon's will supplanted that of Ill Ilah's. Devoting herself to destroying the kingdom of Alma Torran, Arba founded Al-Thamen, also known as "The Organization", and led an attack on the kingdom, culminating in her personally cutting down her surrogate sister, Solomon's pregnant lover Queen Sheba. Vowing to return to destroy the world Solomon creates anew, Arba manifests in Solomon's new world in the Kou Empire, having children for the purpose of possessing them when her current body is worn out. When she possesses her descendant Gyokuen, Arba murders Gyokuen's husband, Emperor Hakutoku, and his elder two sons, mocking her remaining son Hakuryu, the only son Arba herself gave birth to, for his helplessness in learning the truth. Murdering her second husband to seize the throne, Arba attempts to summon Ill Ilah back into the world to drain it dry of magic and leave it a barren, lifeless husk, devoted only to the will of Ill Ilah and to the destruction of all Solomon has made.
  • Magical Girl Lyrical Nanoha Detonation: Phil Maxwell is the film's manipulative, sociopathic main antagonist and Iris's father. Pretending to be a well-meaning scientist, Maxwell would secretly create his daughter to be the ultimate soldier to profit from in wars all over space. When the project to restore Eltria is shut down, Maxwell has the entire population of the colony brutally gunned down. When confronted by Iris's sister figure Yuri, he reveals he's already infected her with his Formula system to make her another weapon he can exploit. When she manages to kill him regardless, he tricks Iris into trying to kill Yuri. Having backed himself up inside Iris, he manipulates her into controlling Yuri as a weapon and beginning to convert Earth into more weapons he can exploit for his own selfish ends. Fully resurrecting, he controls Iris and Yuri to fight their friends against their will, fully conscious the entire time. When Nanoha challenges him, he seeks to do the same to her. When finally defeated, Maxwell attempts to vaporize the city with a Kill Sat purely out of spite.
  • Mai Hime franchise: In this dark Magical Girl Genre Deconstruction, these are the worst villains the heroines have faced:
    • Mai-HiME: The Obsidian Lord/Prince, the will of the HiME Star itself, is a maniac with a desire to wipe out humanity in both versions:
      • Anime: The Obsidian Lord/Prince is the leader of District 1/the First District. Long before his awakening, he had Mikoto Minagi and Reito Kanzaki raised in a cult, making Mikoto kill her own grandfather and eventually possessing Reito. After using Nagi Homura to create the monster Orphans and manipulate the heroines into destroying the rival Searrs Foundation, getting scores of people killed as a result, he forces the heroines into the HiME Carnival/Festival, a Deadly Game in which they must destroy each other's CHILD, which will result in the person they love most dying, under the threat of destroying the world via Colony Drop if they refuse. Having held these bloodbaths numerous times in the past, he, as Reito, manipulates Mikoto, Shiho Munakata, and Mai Tokiha into fighting each other, deliberately getting Takumi Tokiha and Yuuichi Tate killed to break Mai. He also takes the victims of the battles and traps them in pillars to use the souls as power. When Mashiro Kazahana confronts him, he restrains her and puts her maid, Fumi Himeno, under mind control to serve him. Finally, he reveals that he intends to make Mai, the winner, into his bride, and have her kill Mikoto before using her to birth his new, "perfect" race to replace humanity after he kills them all.
      • Manga: The Obsidian Lord/Prince is the mastermind behind the monster Orphans who seeks to destroy humans after having nearly done so in the past. Having possessed the bedridden Takumi Tokiha, he orders Nagi Homura to create the Orphans and cause chaos, while also manipulating the rival Searrs Foundation into attacking. He has Nagi transform Pochi, an Orphan that Mikoto Minagi has been caring for, into a monster that attacks the heroines and is forced to kill itself to save them. He later uses the Star to corrupt Shiho Munakata, turning her into a possessive maniac who kidnaps Yuuichi Tate. Revealing himself to Mai Tokiha, he uses her love for Takumi to turn her into his minion and bride, then broadcasts his plan to the world and, to show he is serious, obliterates Washington DC. When the other heroes infiltrate his lair, he has Mai and his creations, the Great Cosmo Beauties, brutally beat them. Finally, he betrays the Cosmo Beauties by absorbing them into his CHILD form, and tries to use the HiME Star to wipe out humanity.
    • Mai-Otome:
      • Grand Duke Nagi Dai Artài and John Smith, from the anime, are the respective leaders of the Artài Principality and the terrorist organization Schwarz. Desiring to Take Over the World, the two begin by firing an energy cannon on a crowded stadium, injuring many, then unleashing their armies on the Kingdom of Windbloom. Smith also forces Erstin Ho, whom they have raised to be a spy, to attack heroine Arika Yumemiya, while Nagi manipulates Nina Wang into joining him and has her also attack Arika, resulting in Erstin sacrificing herself—to their amusement. Once in power, the two exile Queen Mashiro and the poor population into the desert to die while also using the corpse of Lena Sayers to create the Valkyrie, Otomes that must obey Nagi under pain of electric shock should they refuse his orders. They then order Nina to use the Harmonium to destroy entire cities and kill everyone within, intending to spark a world war. Upon the heroines returning, the two men send their minions to kill them all. Smith then attempts to kill Sergey upon the latter's betrayal; when he fails, Nagi shoots Sergey instead and uses his life to further extort Nina into following his orders, later having her destroy Windbloom and putting the entire planet in danger out of spite when his plans are foiled. Despite claiming to want to free Otomes from their contracts, their real aim is to force everyone to suffer the pain of war.
      • Tomoe Marguerite, also from the anime, uses her charm to mask her malicious intentions. Throughout the show, she tries to personally take out Arika Yumemiya because she saw her as a potential threat to her affections towards her elder Shizuru Fujino. Her attempts involved trying to convince a gang to rape Arika, knowing that if they went through with it, her Otome powers would be neutralized. She later goes on to betray the Alliance, stating that she deserves to have anything that she wanted, and that everyone's lives, except that of Shizuru's, are meaningless to her. She gladly works under Grand Duke Nagi Dai Artài and John Smith, becoming the leader of the Valkyrie squad and bullying her friends into subservience. Despite supposedly loving Shizuru, Tomoe takes great pleasure in essentially making Shizuru into her plaything. When Shizuru reveals to her that she never loved her, Tomoe rants, noting the similarities between her and the older Otome, and states that she was entitled to be the only person to have her, then finally attempts to kill her and Natsuki.
      • Sergey Auguste Taiki, from the manga, is the true mastermind and a far cry from his anime counterpart. In the backstory, he brainwashed Mai Tokiha and Mikoto into becoming his minions, and used Mai and Kagutsuchi to burn down the village where Arika Yumemiya and the male Mashiro lived, killing nearly everyone inside, then raised the male Mashiro as a pawn. As the Prime Minister of Windbloom, Sergey orders military expansion, bringing mass unemployment. He manipulates the Schwarz and Grand Duke Nagi Dai Artài into causing chaos, and upon revealing this, he orders Mikoto to kill the heroes, resulting in Nagi sacrificing himself—to his amusement. Feigning loyalty to the real Mashiro, Sergey helps her take over Windbloom, making his rule even harsher than before and allowing his soldiers to torment and rape the citizens. He unleashes the Dark HiME to kill the heroes, resulting in Nina Wang and Erstin Ho grievously injuring themselves to save everyone. When the heroes confront him, he traps the male Mashiro in a nightmare, forcing him to relive his brutal bullying, while trying to force Arika and Nina to kill each other, then betrays the real Mashiro and controls Fumi Himeno into killing her, before stabbing the male Mashiro. Finally, he transforms into a giant monster and engulfs Windbloom in darkness, intending to destroy the world that he feels is filled with lies. A total madman, Sergey is said by the male Mashiro to love no one, not even himself.
  • Majin Tantei Nougami Neuro: Sicks, real name Jody Tubulik, absolutely revels in his evil. A monster from birth who slit the other babies' throats in his nursery and later murdered both his parents, Sicks comes into conflict with the demon detective Neuro Nōgami. Sicks tracks down his clone, X, and murders X's love, infiltrating the police by wearing the skin of a man he killed. He punishes a subordinate who had failed to find X by making him saw himself open with a rusty saw, admitting he didn't care about a fair punishment, he just wanted to see the man die. To present a meal for Neuro, a demon who eats mysteries, the sadistic Sicks forces a mansion's worth of people to commit murders in inventive ways, and then blew them up when Neuro was repulsed by the gesture. When recruiting his "Fingers, " Sicks presented one with a cube made of the faces he had ripped from everyone close to him, and with another he forced him to murder his own father. Sicks's goal was nothing less than the absolute annihilation of humanity, and on his orders, Japan suffered catastrophic death tolls before he and Neuro finally engaged in a Duel to the Death.
  • Makai Tensho manga, by Ken Ishikawa: Mori Soiken is a centuries-old wizard who plans to create a portal to Hell to unleash Satan and plunge the world into darkness. Originally a ninja named Karula, Soiken discovered the powers of resurrection and the gateway to Hell. The father of demon Amakusa Shiro Tokisada, Soiken took him as his own in order to find out Hell's secrets and to easily control Satan. Orchestrating the Shimabara Rebellion alongside Amakusa, Soiken has 30,000 of his men slaughtered as an offering to Satan, and once that was deemed "too small", he decided to resurrect the spirits of various Japanese warriors as powerful demons using women as incubators. With his squad, Soiken has Hoizon kidnap hero Yagyu Jubei's dying father to make him a demon, spreads a disease upon the Kishu village that causes its citizens to go mad, and tries to have Jubei resurrected to serve as his most powerful fighter.
  • Malicious Code, by Masahiro Ikeno: Echidna is a member of the Killers, an organization led by Edgar to control the ruins of Tokyo. Roaming in the ruins of Tokyo to search Code users and kill them to steal their powers, Echidna steals the eyes of her favorite victims and implants them into herself. Interrupting the fight between Hiro and Izumi, Echidna uses her powers to control the body of one of Izumi's friend and force him to kill an injured Izumi. Revealing the truth about herself, Echidna admits being behind the spread of the Pandora Virus that killed 90% of the Japanese population, and the creator of Hiro and the rebellious Killer Mikoto, calling herself their mother to insult the former. Using the powers of the powerful, blind Yomi, Echidna admits having ripped Yomi's eyes to have her powers when she was a child, declaring that she didn't needed them before trying to kill Hiro and his friends. Having killed dozens by her own hands, Echidna also helped to killed millions in the past, all for the sake of her own power.
  • MÄR: The manga version of Halloween is one of the most sadistic and brutal members of the Chess Pieces. Originally a homeless and bullied boy by the name of Pamp, he had a firm belief that the weak become sacrifices for the strong, and promised to become strong so he could kill everybody in the village. He started off by killing neighborhood pets before going on to stab five kids to death and fleeing the village. During the first War Games, because he and Alan tied, he cursed Alan and Edward to be forcibly merged together out of spite. Six years later when Phantom resurrects, Halloween and Chimera launch an attack on the country of Acalupa, destroying it and wiping out the majority of its population, recounting to Ian how fun it was. To punish Ian for not taking part in the attack on Märhaven, Halloween has Chimera transorm Ian's best friend, Gido, into a grotesque mixture of human and monster, knowing it would cause more pain to Ian if his best friend was punished instead. During his fight against Alan in the second War Games, Halloween distracts Alan by setting several innocent spectators on fire while telling Alan how sickened he is by Alan's sense of protecting those in need.
  • Marry Grave: Markov is the Gorgon King who invaded the Dwarf Kingdom by petrifying most of the people inside so that he could put them in his collection of statues. In the past, he was a stepfather of Riseman Sawyer's guardian, Dante, who uses him as a puppet for slaughtering most of the soldiers while lying about what happened to Dante's parents. After Dante found out the truth, Markov killed Dante's parents during his murdering spree just for the sake of his amusement, and when Dante re-settles his score with Markov in the present day, the latter simply petrifies Dante.
  • Mazinger franchise:
    • UFO Robo Grendizer:
      • Original manga: The psychotic Barados is the worst of the Vegan commanders. When attacking Planet Fleed, Barados built a mountain out of the civilian dead while abducting the women and children. Barados used them as hostages to get Planet Fleed to turn over their best weapons and proceeded to "release" them—by dropping them down miles to shatter upon the ground. Upon taking command of the invasion upon earth, Barados targets civilians to abduct and ties them to his own mecha when engaging Grendizer, killing several just to prove a point and intending on killing them all to secure his victory.
      • Gosaku Ota's manga: King Vega, ruler of the Vegan forces, is a brutal conqueror who abandoned most of his people to die on their doomed homeworld, deeming them unworthy of rescue. Conquering world after world, Vega had Planet Fleed annihilated, with the people massacred, converted into Cannon Fodder soldiers, or having the women sent to "service" Vegan officers. On Earth, Vega commands widespread destruction from his forces, and when he takes command, intends to set off every nuke in the world to exterminate all life on the planet, something which horrifies even other Vegan commanders like the ruthless Zuril.
    • God Mazinger manga: Prince Eldo is the prince of the brutal alien Dragonia Empire and son of the Golden King Dorado. Introduced saving a girl from cannibal rapists, Eldo brings her to his castle where he strips her naked before using a machine to turn her into a cat-human hybrid to be his pet. Unwilling to use the mask of his father and persuaded by his assistant, Eldo decides to end the war between Dragonia and Mu quickly and breaks the only rule given by his father. Unleashing the alien army the Megalo, Dragonia's forbidden weapons, Eldo uses the chemical, atomic and laser weapons on the Mu's army while enjoying the massacre, and congratulating himself for it before trying to capture the Princess Aila Mu to turn her into his captive. Lacking his father's desire to save his people, Eldo is called out on his actions by the former, who is horrified at his actions.
    • Shin Mazinger Zero: The Juzo Kabuto of the second timeline—despite his short appearance—is responsible for the events of the series. An egomaniacal scientist and grandfather of Koji Kabuto that got information from a version of himself of an alternate future. Juzo Kabuto betrays his family and creates the Mazinger to use it in a war of conquest against the entire world, murdering entire armies and destroying cities until all world leaders bow to him. Bored with his victory and frustrated after realizing that his Mazinger wasn't the most powerful version of it that could exist, Juzo burns the world leaders with the Mazinger despite their surrender and orders Minerva X to reset the timeline and share his scientific developments across the world in order to create an actual challenge for himself in another timeline, leading to the rise of Dr. Hell and creating a cycle of tragedy where the world would be destroyed in multiple ways for either Dr. Hell's ambition or the Mazinger's massive power.
    • Mazinger Z: Infinity: Dr. Hell, stripped of all redeeming qualities, is a ruthless Mad Scientist who sees the world as imperfect and flawed. Deciding to return and create a new world, Dr. Hell erases an entire city to try to get at Mazinger before attempting to murder Testuya Tsurugi after coldly trying to deprive him of all hope. In the ensuing battle, Dr. Hell attempts to annihilate the universe and all that lives just so he can recreate it as the new god, not even showing any care or remorse when his loyal servants die in combat for him.
    • Devilman vs. Hades: In this non-canon continuation of the original Devilman manga, Jinmen is even more vile. Desiring revenge on Akira for killing him, Jinmen makes a deal with Hades, offering his services in exchange for chance of killing Akira. Eventually devouring the souls of Akira's entire hometown, Jinmen trapped them on his shell in his own version of the city, where they can never die. Luring Akira there and tormenting him with the sight of Miki's severed head, Jinmen begins to destroy parts of the town in hopes of killing Akira, torturing all its residents, while proudly intending to keep them as his own playthings to torture for all eternity.
  • Metal Armor Dragonar: General Dorchenov is a high-ranking, brutal member of the Giganos Empire who pushes his leader Marshall Guiltorre to worse deeds, including advocating for a group of Earthling demonstrators to be massacred. When he reveals his super weapon, the Lava Gun, to cause mass casualties on Earth, a disgusted Guiltorre rebukes him, resulting in Dorchenov murdering him, framing the heroic Giganos pilot Meio Plato of the crime and seizing control of the Giganos empire. Dorchenov proceeds to brutalize the Earth, ordering as much death be brought to he planet as possible. When he loses the advantage, he orders his own men to initiate suicidal tactics and takes advantage of an attempted cease-fire to kill even more of Earth's forces, taking the hero Kaine's mother hostage to gain a greater advantage, admitting he cares nothing for the cause of Giganos as long as he can win in the end.
  • Metroid: These Space Pirates have done their best to be the worst of the worst.
    • Metroid Manga:
      • Ridley, Arch-Enemy of Samus Aran, is the monstrous, dragon-like military commander and security chief of the Space Pirates, and is the most brutal, vicious and monstrous member of the organization. He is introduced attacking Samus Aran's home colony, and immediately gave orders to his men to slaughter everything in sight and enjoy it to the fullest. When the three-year-old Samus tried to befriend him, Ridley attempted to murder her, killing her mother when she tried to save her daughter. After Samus's father sacrificed himself to destroy Ridley's ship, nearly killing him, Ridley survived by eating the corpse of Samus's mother to heal himself, a fact he later uses to mock Samus. A veteran raider, Ridley has slaughtered dozens of innocent colonies and was the one responsible for annihilating the last of the benevolent Chozo race who had rescued and raised the child Samus. Driven by a relentless and mutual hatred of Samus and his desire to destroy and kill whatever he can sink his claws into, Ridley is one of the most feared beings in the universe and a sadist of the highest order.
      • Mother Brain was an advanced A.I. who was initially created with peaceful intentions by the dying race known as Chozo, but grew a god complex from her role. In order to take the universe for herself, she trained an orphan named Samus Aran to become her own personal Tyke-Bomb and then allies herself with the vicious Space Pirates while letting them attack the Chozo planet, Zebes, as she felt that she already surpassed the Chozo in terms of intelligence. After Samus discovers Mother Brain's plans in horror, she attempts to manipulate her into joining her side, and when one of the Chozo rebelled against her, she uses the leader of the Space Pirates to kill him. After Samus returned to Planet Zebes during the "Zero Mission" incident, it was revealed that Mother Brain intends to use a dangerous substance known as Metroid and pit the Space Pirates and the Galactic Force members against each other in order to reshape the universe in her own vision.
    • Metroid Prime: Episode of Aether: In this manga adaptation of Metroid Prime 2, "Boss", the unnamed Space Pirate leader, raids the space ship Crest and tries, alongside his crew, to hijack it, killing a civilian who happened to be there. When the Crest Captain begs "Boss" for mercy, the Space Pirate overhears a worried child calming his sister down, saying that help is on the way. "Boss" torments them as much as possible before trying to murder them, as well as everyone else on board the ship, laughing at the older child trying to protect his younger sibling. When Samus comes to the rescue, "Boss" holds one of the children and the Crest Captain hostage and when Samus aims at him, he throws the hostages, chasing after them with the intent to slice their heads off.
  • Mixim: Dodo is a Monster Clown whose only purpose and drive in life is to devour all he can. Dodo, initially a member of the Big Bang Zero group and one of their four elites, is also the only one to lack any redeeming quality or Freudian Excuse for his actions. What sets Dodo apart is how he devours the populations of planets, including women and children. He relishes in what he does and has no loyalty to his allies. When one of them, Heigar, was injured, Dodo took the chance to devour him. When he encountered two children on one world, he tried to eat them as well, not caring they'd be future allies. In his final battle with the heroes, he even killed the team mascot before trying to kill and devour all the other good guys as well.
  • Mnemosyne:
    • Apos, with his golden hair, crimson eyes, and beautiful features, resembles an angel. The truth is markedly different. Apos is an immortal who finds amusement in suffering and agony. Apos hunts down female immortals and rapes and tortures them physically and mentally to consume their "core" of immortality; the suffering improves the taste. Apos obsesses over the heroine Rin Asogi and has his female subordinate Laura disguise herself as Rin to ruin Rin's name with a series of murders, and also satisfy his lust by raping her. At one point, he brutally crucifies and rapes Rin's best friend and lover Mimi simply because he was bored waiting for Rin's arrival. Apos is behind nearly every evil plot in the series and engineers a plot to turn the world against immortals and turn on itself by causing a nuclear explosion with an immortal seen as a survivor. He then reveals the world tree Yggdrasil to the world to have humanity infected with the time fruits and become immortal so he can harvest them at leisure. Apos betrays Laura and forces Rin to kill her old lover, who Apos had turned into a carnivorous angel, in self defense, before personally executing her current lover—Apos's own father—and attempting to sacrifice Rin to Yggdrasil. When asked what he wants with the world, Apos's response is simple: "I want to taste it!"
    • Sayara Yamanobe is a repulsive, callous scientist, who masterminded the cloning program that killed the original Koki Maeno. She keeps the failed test subjects as ravenous, flesh-eating zombies that suffer every moment they're alive. When she has Rin in her care, Sayara proceeds to molest and then torture her to death while it's more than just implied that she molested and raped Koki as well, also being hinted this is "routine" for her. Sayara later just attempts to wipe out all human life.
  • Mon Colle Knights: Redda is a Fallen Angel who rarely picks fights with characters that are either weaker or stronger than he is, but that's because he doesn't need to. Instead, he prefers to stick with his mastery of manipulation, which he takes pleasure in using on others, especially to the point of driving them to suicide. He also loves subjecting things to disturbing transformations. He even takes Rockna hostage and sticks her inside Dread Dragon's neck and commands it to create a wormhole that sucks all of Mondo's monster friends inside it, leaving Mondo with a Heroic BSoD.
  • Monster: This work, dedicated to exploring whether there is such a thing as pure evil, concludes that while anybody, no matter now heinous, can be redeemed, it is Johan Liebert's refusal to seek redemption that makes him the titular monster. A sadistic chessmaster since he learned to walk and talk, Johan murdered his own foster parents and manipulated over 50 adults and children into massacring each other even as a preteen, and, as an adult, Johan is on a personal journey to become, in his own words, as dark as possible. He is also trying to find out if there is anyone as evil as he is out there, or, failing that, forcing the heroic Dr. Tenma, and/or his own pacifistic sister, Nina Foertner, to kill him in cold blood. In this way, he hopes to establish that even the best people can become just like him. Along the way he convinces children to jump from rooftops; gets a recovering alcoholic drunk before throwing him off a building; sets a highly-occupied library aflame; and convinces various serial killers to murder every foster family he has ever lived with, as part of his quest to become an unperson. In the end, Johan tries to manipulate the population of an entire town into slaughtering each other, and, failing at this, prepares to shoot a child in the head just to torture Tenma. Numerous excuses are proposed for Johan's behavior, yet each one is ultimately undermined, revealing that in the end, Johan simply is pure, unadulterated evil.
  • Monster Hunter: Stories—Ride On anime: Lord Anvis, the ambitious ruler of the Ebon Riders, has coveted the power of the Rite of Overlapping since he was a child and envied those who harnessed its power. Anvis's first attempt at the Rite involved forcing the man capable of performing the ritual into doing so with a knife pointed at his wife's neck, resulting in a botched ritual that killed both the man and his wife anyways. Anvis later repeats another attempt at the Rite he knows is doomed to fail with one of his loyal minions in his place, resulting in the annihilation of her soul. Anvis manages to cajole the son of the sorcerer he murdered years ago into performing the Rite on him, and with his newfound power Anvis promptly annihilates the nearest town and attempts to obliterate the gigantic city of Gildegaran simply because he believes the strong must eradicate the weak. Anvis is the sole demonstration of genuine human evil and the only figurative monster in a franchise full of literal monsters.
  • Monster Rancher:
    • Moo—"Muu" is Japanese for darkness or emptiness—was a Supersoldier created by an ancient civilization to win a war. However, Moo realized how powerful he was and viewed himself as too good to be a living weapon, destroying all who wouldn't serve him. Feeding off anger and hatred, Moo turned many monsters into his servants before his battle with the Phoenix ended with his soul sealed into a Mystery Disk. Ages later, Holly's father finds the disk in his search to prove the Phoenix's existence, unintentionally freeing Moo, who possesses the man and feeds off his deep rage at being banished. Seeking his real body to resume his conquest, Moo recruits many monsters with anti-human beliefs to aid him, giving them crests that, if removed or destroyed, will kill the wearer. All humans and monster who do not conform to his views are either killed or enslaved. Realizing the Magic Stone can help him find his body, Moo kidnaps Holly, revealing his identity to her to bring her to his side. Along the way, his crimes include corrupting Tiger's brother Gray Wolf; killing his minions for any reason; and the attempted murder of a little girl after reclaiming his true body. When he is seemingly destroyed, Moo's soul was found by General Durahan in a bid to grow more powerful, only for Durahan to become Moo's new unwilling host, already driven insane from all the hatred he absorbed and aiming to destroy the world. Feared and hated by human and monster alike, Moo stood out in this otherwise fun adventure series as a creature of pure evil.
    • Lilim is General Durahan's right-hand woman and convinces him to betray their master, Moo, and take power for themselves. When first attempting to stop the Searchers and take the Magic Stone, she holds a human baby hostage to force Jagged Hound and Tiger into a fight to the death, then orders it killed once the fight is over. When Jagged Hound seems to emerge victorious, she presents Tiger's Lost Disk to the Searchers and laughs at their despair, then orders them killed, quickly fleeing once it turns out the death was faked and the baby saved. On a later assignment with a Weed to get the Stone, she cruelly wounds him once it's retrieved, then has him gunned down in a display that horrifies the Searchers, who she orders killed in the same way. Lilim soon realizes that Moo is much stronger than Durahan and betrays the General in a bid for more power, killing his frozen soldiers and setting his ship to self-destruct with the Searchers and everyone else onboard.
  • Muhyo and Roji: Of all the villains Muhyo and Roji has encountered, these two came across as the most monstrous:
    • Teeki the Fallen, of the forbidden magic association Ark, manipulates their leader Soratsugu "Enchuu" Madoka by killing his mother and building his hatred. Responsible for nearly all the misery and suffering in the first half of the manga, Teeki disguises himself as various members of Magic Law Association—MLS—in order to manipulate a desperate teacher, Rio Kurotori, and plans to unleash the powers of a book that would kill millions. Toying with the emotions of a troubled girl, Teeki convinces her to join him, promising it will bring her attention from the boy she loves. Releasing all the ghosts sealed in the Arcanum-—and strangling the Executor who discovers him-—Teeki basks in the chaos they cause. In his final battle with the heroes, Teeki orders his pacifistic follower to kill anyone armed with a weapon that can harm him. When the subordinate refuses, he threatens to destroy the sweets holding in his curse, which would end up killing the subordinate and wiping out the heroes. Merging with Enchuu in a final attempt to kill anyone in the way of his plan to cause countless deaths, Teeki remains a bitter monster to the very end. Although his hatred of the MLS is explained by his excommunication from them, Teeki's choice to spread pain and destruction to many innocents cements him as an irredeemably wicked being.
    • Tomas is a former MLS teacher who is wanted for several crimes such as abduction and identity forging. Joining the ARK so that he could become immortal, it was revealed that Tomas had a penchant for collecting countless things, including human souls, that he kept in his collections while keeping their consciousness intact, leaving them in constant torment. When ARK members made their move by burning one of the Executor's headquarters, Tomas wastes no time to kidnap said Executor and tortures him with a worm that could turn him into a ghost. When Muhyo and his companions tries to save said Executor, Tomas uses the latter and all of his collections as a personal weapon to attack Muhyo and his companions. Seemingly defeated, he then gained a new body granted by his envoy, planning to use said new body to fulfill his obsession of collecting pretty things in the world.
  • Murder Princess anime: Cecilia is a mysterious black mage who, prior to the main story, in order to test her power, decimated a nearby village, which resulted in one of the villagers, Falis, becoming a bounty hunter. Cecilia also murdered Falis's father in cold blood. Several years later, it was revealed that she gave the information of the lost technology to a humble scientist of the Foreland Kingdom, Doctor Akamashi, which causes said scientist to launch a coup d'etat against the Foreland Kingdom. Cecilia also brainwashed the crown prince of the Foreland Kingdom into becoming a Black Knight in order to gain the power of the lost technology known as Teoria, and when Akamashi tries to seize the power of Teoria for himself, she then executes Akamashi by using the brainwashed prince.
  • Mushiking: Adder in the Portuguese-EU dub lacks any of the tragic backstory that his Japanese counterpart had and is behind all the bad things that happen. Seeking to escape from the forest by activating a spaceship, Adder uses all of the life force of all organisms in the forest, resulting in vast regions becoming a lifeless wasteland. When one of his servants saw his family vaporized, Adder then lies to him by saying that it was all the main character's fault. After this, he released the red-eyed beetles to cause more death and misery towards other ecosystem. Due to his spaceship needing a seal in order to activate it, Adder sends his mercenaries to the protagonists to retrieve said seal and tries to enslave one of the protagonists—who is essentially a child—to pilot his spaceship. After the seal denied Adder the ability to pilot the spaceship, Adder then tries to murder everyone who is aboard on the ship out of spite.
  • MW: Michio Yuki is a manipulative blackmailer, bisexual rapist, kidnapper, and murderer. In one chapter, he seduces and kills, for sexual thrills, the daughter of the president of the bank he works at, fakes her kidnapping, anonymously extorts ransom money from her parents, then robs her father's bank and pins the robbery on the dead girl by impersonating her, finally killing her father by making him lose his grip on a precipice by throwing lit matches into his mouth. His crowning achievement is stealing a classified military neurotoxin, the titular MW, and trying to slaughter as many people as he can with it as vengeance for his own mortality.
  • My Hero Academia: Vigilantes: Kuin Hachisuka is a Quirk-using queen bee, and dealer for the dangerous Quirk-enhancing drug, Trigger. Prior to the story, Kuin critically wounded the wife of Knuckle Duster and invaded the mind of his daughter, Tamao Oguro. Using Tamao as a host, Kuin regularly invaded homes and murdered their residents to take them over, regularly changing homes to find more victims whenever she got bored. Kuin introduces herself by using her Quirk, Queen Bee, to infect several innocent civilians with Trigger, causing them to go on rampages while in constant pain. She later convinces the ruthless vigilante Stendhal to attempt to murder young delinquents who previously used the drug. For no reason other than her amusement, Kuin attempts to cause a bus filled with passengers to crash, complaining how boring it would be if there were no victims when the hero Ingenium saves them. She also uses her bees to possess a classmate she befriended, having them burst out of her body to attack the delinquent, Souga Kugizaki, wounding if not killing her friend. When she hears that there'll be a concert that Pop Step is a part of, she has a monstrous electric eel, formerly a regular young man who Kuin kidnapped and experimented on, to cause a blackout, intending to infect everyone at the concert with Trigger. When cornered by Knuckle Duster, Kuin attempts to detonate several of her explosive filled bees, knowing that the recoil she'll suffer will kill Tamao.
  • Myriad Colors Phantom World: "Him" is the First Phantom and the supreme deity of the world. Born from the human mind, Him passively watched the world for thousands of years before choosing Touka Kashima, establishing contact with her and making her the first child with special abilities. When Touka's attempt to use the Artificial Phantom Ruppa to destroy the world fails thanks to Haruhiko Ichijou, Him creates a parallel world where Ruppa succeeded and caused the extinction of humanity, which made Him resurrect one third of humanity to keep things interesting. Taking a personal interest in Haruhiko, Him divides Haruhiko's soul to get rid of Haruhiko's optimism and later Him corrupts Haruhiko's partner Marcosias into a violent demon. He does this to screw with Haruhiko's mind and turn him into a being who would eventually attack his own friends and his own counterpart from the original world. Using Touka as his enforcer in the alternate world to keep humanity under constant attack, Him considers humans to be mere actors in his play and causes countless tragedies for his own amusement.
  • The Mysterious Cities of Gold:
    • Conquistador Francisco Pizarro is the conqueror of the Incan Empire and a cruel, greedy man out for his own enrichment. Seeking the Cities of Gold, Pizarro tries to have entire villages razed and to kill or enslave young Esteban and his friends. Taking over the Incas, Pizarro forces them into slavery and massacres a great deal of them, wiping out their empire to establish control. Ostensibly loyal to the Spanish crown, Pizarro's only true loyalty is to himself and his insatiable greed.
    • King Menator is the cruel ruler of the Olmecs, an underground race seeking immortality. Tyrannizing many of the local tribes, Menator kills and harvests countless innocents for their skin cells to rejuvenate himself and the Olmecs, trying to have Esteban and his friends subject to the same fate and ordering an entire village massacred when they escape into its borders. Menator seeks the Cities of Gold for its priceless technology, using his flying weapon to vaporize many of the Mayans—whom he regards as utterly inferior—when they rise up against him, and even horribly beating the young Tao against a cliff side with the threat of killing him if he's not allowed access to the Cities of Gold. Though preaching everything he does is for the benefit of his race, Menator only intends to preserve those "worthy" while dismissing the lives of the rest and even his own loyal soldiers, intent only on taking what he can and killing everyone else in his way.
  • Mysterious Joker anime: Professor Clover, introduced as a mere treasure-hunting burglar, reveals himself to be insatiable greed personified in his second appearance. Kidnapping and posing as a kingdom’s general to manipulate the land’s princess, he seeks to activate a weapon which would destroy the city, just to get an orb to power up his staff. To gain a rare treasure, Clover murdered the parents of two main characters, leading to both going through horrific childhoods following being orphaned. Previously working as the agent of an unknown federation, Clover again worked to steal another treasure, hoping to use its power to threaten the citizens of the nation containing it to submit to them lest he wipe them from the face of the earth. Manipulative and cruel, Clover corrupts a girl with time-bending powers, using her to steal more treasure and cause more havoc. When the heroes try to save her from his clutches, Clover threatens to murder her with acid, rather than lose her. Clover stands out in a usually-lighthearted series.
  • Nabari no Ou: Miharu's seemingly-aloof ally, Fuuma Kotarou, is the true mastermind behind the tragedy surrounding the former's life. A 117-year-old ninja with shapeshifting powers, he manipulates multiple important people to obtain the Shinrabanshou so he can become God. Posing as Inasa, he founds Kasa and uses the organization to train children and teenagers into becoming his expendable assassins. A decade before the story, he brutally killed a four-year-old Miharu in front of his mother, hoping to drive the latter to despair. In the story's climax, he betrays and murders his partner, before trying to steal the Shinranbanshou from Miharu—knowing doing so would kill Miharu—and tortures Tobari while he orders his servants to kill all of Miharu's friends.
  • Naruto, while idealistic, does have a few irredeemable characters, who surpass all the others in heinousness:
    • Hidan, a member of a Religion of Evil, worships violence and death, and sees mercy—or anything other than full-scale slaughter—as a sin. He and his partner, Kakuzu, corner and capture the Two-Tails jinchūriki, Yugito Ni, delivering her to Pain for draining and, eventually, death. The two of them subsequently slaughtered a temple's worth of monks in order to collect the bounty on the head monk, Chiriku. During the battle at the bounty station, Hidan engaged Asuma Sarutobi in combat, and used a religious ritual to bind their souls together, then began mutilating himself in order to torture Asuma, ultimately leading to the Leaf Ninja's painful death. When Asuma's student Shikamaru confronted Hidan, Hidan mocked his mentor's memory, and attempted to inflict the same fate on Shikamaru.
    • Legend of the Stone of Gelel: The greedy Haido seeks the Stone of Gelel, having attacked Temujin's village for it, personally killing the latter's parents in the massacre. Sparing the children for the use he saw in them, Haido made Temujin his apprentice while having the others put their souls in suits of armor and turning them into his unquestioning soldiers. Haido uses his brainwashed army to assault the Land of Wind for the Stone, and upon reaching the Mines of Gelel, Haido begins an all-out slaughter, and even mocks Temujin when he realizes Haido was responsible for his parents' death. Transforming to kill his enemies, Haido proclaims that with the Stone in his possession he will enslave the entire world.
    • Shippuden anime:
      • Twelve Guardian Ninja Arc: Kazuma, also known as Furido, is a former member of the Twelve Guardian Ninjas and was a friend and comrade of Asuma Sarutobi and Chiruku. He saw the Hokage, and by extension, useless and threats to the figurehead Fire Daimyo in the Land of Fire. Originally, he convinced half of his comrades to try to assassinate the Hokage while Asuma stopped him, and seemingly killed him. Years later, after it was revealed he implanted Kurama's chakra into his son to create a weapon to destroy Konoha, he attacks dozens of border towns with his men. After killing thousands of people, he raided the tombs of his former comrades and would use them to make a Weapon of Mass Destruction to incinerate every man, woman, and child in Konoha to the ground, all the while constantly beating and manipulating Sora to turn on his new friends. The people he killed on the border towns were used to create a small-scale Zombie Apocalypse around Konoha to distract, and trap, everyone in the village. Finally, when that plan failed he triggered his son's Super-Powered Evil Side and sent him to destroy Konoha.
      • Power Arc: Disonasu seems to be the kind leader of Hachō Village. In truth, he is a Serial Killer who once collaborated with Orochimaru on Reanimation. Desiring power after a defeat at the hands of Pain, Disonasu teams up with Kabuto in order to acquire the ancient device known as the Ama no Hoko, ordering and participating in a massacre on the nearby Tonika Village to gain the "Sounds" necessary to activate it. When he finds two of the Sounds missing, Disonasu orders Kabuto to attack his own village to find them, resulting in a battle that nearly destroys the whole town in the process. In spite of being aware of the world-destroying power of the Ama no Hoko, Disonasu activates it anyway for the simple reason of wanting to regain the power that he lost long ago.
    • Boruto: Naruto the Movie: Momoshiki Otsutsuki is a member of the ancient Otsutsuki clan who arrives on the Naruto Earth and promptly drains Killer Bee of chakra, leaving him for dead. Intending to harvest all the chakra of Kaguya Otsusuki, which would likely kill every living being with chakra on the planet, Momoshiki attempts to cultivate a new chakra tree to enhance his own power. While the chūnin exams are underway, Momoshiki and his partner Kinshiki Otsutsuki attack the Leaf Village, Momoshiki destroying everything in sight while laughing like a maniac as he targets civilians. Only Naruto's sacrifice saves Momoshiki from annihilating the entire village, and possibly more, with a huge attack. Capturing Naruto, Momoshiki attempts to drain him dry of chakra and shows no remorse in literally eating the loyal Kinshiki for more power, or trying to kill all of Naruto's rescuers, even his twelve-year-old son Boruto.
    • Konoha Shinden: Steam Ninja Scrolls: The Jashinist Ryūki poses as a holy man seeking to help people connect to their loved ones. Behind a series of kidnappings while seducing young women to his sect, Ryūki brings them for a holy ritual, though he intends to poison and offer them as blood sacrifices in a large number to his god Jashin in order to achieve immortality. Despising the peaceful era he exists in, Ryūki gleefully intends to throw the world back to chaos and slaughter, viewing the depraved Jashinist murderer Hidan as the only being worth emulating.
  • Nasuverse:
    • Lunar Legend Tsukihime manga: Michael Roa Valdamjong was once a pure priest who fell in love with the True Ancestor Arcueid Brunestud. Growing to despise her for stealing his "purity", Roa became a parasitic vampire who stole the lives of others, possessing them to take new incarnations, going on vicious murder sprees to steal countless lives in hopes of drawing Arcueid to him to possess or torment her. In his 17th incarnation, Roa possessed a girl named Elesia and used her to rape and murder the people of her village. In the present, Roa incarnates in SHIKI Tohno, intending on killing even more people before going after Arcueid again, disdaining her for being "sullied" from the pure vision he once knew.
    • Fate:
      • Fate/Zero: Ryuunosuke Uryuu is the master of the equally sadistic and twisted Caster, Gilles de Rais, but lacks the latter's care for Jeanne d'Arc, making him worse by comparison. He introduces himself by sacrificing a child to summon a demon and becomes ecstatic when he watches Caster kill said child. It is soon revealed that Ryuunosuke is a Serial Killer of women, children and whole families, whose MO involves luring his victims to Caster, which then proceeds to torture and mutilate them before slowly killing them. When their hideout was discovered and destroyed by Weaver and Rider, Ryuunosuke convinces Caster to summon a demon in Fuyuki City River in an attempt to kill even more innocents. Despite forming a bond with Caster, this is simply a reflection of Ryuunosuke's own murderous traits rather than any genuine care, which he loudly states on using it to cause death on a grand scale, while he won't have to worry about dirtying his own hand. Taking joy in murder, suffering and death, Ryuunosuke is one of the most depraved masters in the history of the Holy Grail Wars.
      • Fate/Apocrypha: Celenike Icecolle Yggdmillenia, amongst the morally ambiguous Yggdmillenia family, is the only one who absolutely has no moral compass. Celenike practices blood magic, sacrificing innocents, including children, which she takes great pleasure in. A sadistic dominatrix, Celenike keeps a dungeon in her spare time where she tortures those who cross her, or just those who catch her fancy for the fun of it. In between missions, Celenike will very regularly torture, rape and murder attractive young men, especially homunculi she deems "useless". Celenike also become fixated on her Servant Astolfo. After becoming jealous that he is forming a bond with Sieg, a homunculus who has formed an identity, Celenike snaps and uses her Command Seals to force Astolfo to gruesomely murder Sieg just to break Astolfo. Unlike her other family members and many other antagonists from the franchise, Celenike is motivated by nothing more than cruel lust and unrestrained sadism.
    • Kara no Kyoukai: The Garden of Sinners—Paradox Spiral (OVA): Cornelius Alba is a hyperactive, flamboyant, murderous mage with a sickening obsession with tormenting and killing his old academy rival Aozaki Touko. Allying with Souren Araya, Alba assists the man in his horrifying scheme involving the Ogawa apartment complex, entailing the massacre of the residents and then trapping their brains in an unending loop of their final days alive and eventual deaths, a crime that Alba proudly brags about to Touko with glee. When Touko's head is severed from her body by Araya, Alba takes her fully-conscious head for himself to molest and torture as he pleases, before crushing her in his bare hands after bragging about his intentions to kill her defenseless protege Mikiya. Alba is killed after brutally beating Mikiya, smashing his head repeatedly into a wall and stomping his head just because of his association with Touko.
  • Necromancer: Even in this dark manga, these two stand out as the worst Slum Street has to offer:
    • "Way to Attain": Detective Ricott's unnamed superior appears to be a kind, upstanding policeman, when in actuality, he's the leader of a child trafficking ring where he kidnaps children from Slum Street to be sold for money. When the thief Lito continuously saves the children, the superior has Lito framed for human trafficking and has him executed. When Ricott discovers the superior's plot, the superior tries to kill her and the resurrected Lito. while the latter tries to save his captured young sister.
    • "An Ugly Guardian" arc: Jack the Ripper is a psychotic Serial Killer who decapitates people she finds beautiful and keeps their heads in jars as a way to admire their beauty. Having done this to 29 people, including a widower who showed appreciation to the Grave Keeper, Jack tries to make Detective Ricott her next victim, mocking the Grave Keeper for ever thinking that the widow could ever love him.
  • Ne0;lation, by Tomohide Hirao and Mizuki Yoda: The Cracker code-named the "Beast of Gevaudan" is a genius hacker and Ne0's Arch-Enemy. Proclaiming himself as a crime consultant, assists several criminals, such as becoming a secret sponsor of "The Lemming Game", which causes several people to commit mass suicides; helping a street racer with his illegal activity, and even helping a politician to spread fake news to eliminate his rivals. When one of the criminals failed to meet his expectations, he brutally murders said criminal. When Ne0 attempts to stop Gevaudan, the latter, in order to spite Neo, erases all of Neo's footage of Gevaudan's murder of a hacker Lemming.
  • Nidome no Yuusha: Princess Alesia is the one responsible for summoning Ueki Kaito to her world. In the prologue, after having him save their world, Alesia reveals her true colors, spending a year hunting him down like an animal for her own sick pleasure before succeeding at stabbing him to death with her comrades. Upon Kaito's return, he learns Alesia sacrificed 200 beastmen slaves to summon him, while also condemning 5 of his relatives to horrific deaths. Sickeningly racist, Alesia orders bloody purges of anything with less than 100 percent human blood, even having a village butchered so the souls can be offered to a powerful demon for her benefit. Alesia promotes brutal slavery throughout the land, and when she confronts Kaito, gleefully states she'd happily have him impregnate some beast-man sex-slaves and kill the newborn children right before him.
  • Night Warriors: Darkstalker's Revenge: Pyron is a malevolent alien being who travels from world to world for fighting and excitement, inevitably destroying them when they fail to meet his expectations. Arriving on Earth, Pyron announces himself by annihilating populated towns with the warning to entertain him or risk death. Pyron proceeds to kill multiple defenders of Earth in the ensuing fight, gleefully tormenting the hero Donovan, and when Donovan manages to stand up to him Pyron attempts to wipe out the world and everyone in it out of spite.
  • Ninja Gaiden: In the anime movie based on the original NES trilogy, Professor Bucky-Wise is a seemingly-nice man who was really the hidden villain pulling the strings. Bucky-Wise recorded a power surge when Ryu Hayabusa defeated a powerful demon, managing to capture some of its power. He forces his colleague Ned Friedman to help him perform bizarre experiments by kidnapping his daughter Katherine, using the demon's power to create an army of genetically altered creatures. Bucky-Wise is experimenting on humans, as Ryu and his friends discover that one of his labs has babies in jars and a twisted, mutilated dead creature on the ground. Bucky-Wise has his monsters attack Ryu and, when they fail to kill him, he kidnaps Ryu's girlfriend, Irene Lew. Ryu goes to Ned Friedman's corporation, believing he kidnapped her. Ryu confronts Ned, but Bucky-Wise kills him, stating he is no longer useful to him. Bucky-Wise then tells Ryu he plans to release the same demon Ryu defeated on the world,not caring that this demon has the power to destroy humanity. Ryu kills Bucky-Wise and frees Katherine, but not before Bucky-Wise transferred some of the demon's power to her, making her a vessel for the demon.
  • Ninja Resurrection OVA: Mori Soiken is the chief strategist for Amakusa Shirō, aka Jesus Christ. Planning to create a Hell on Earth, Soiken tries to get Jesus to be reborn as Satan by destroying his idealism, doing so by killing two young girls he knew and framing Yagyu Jubei for the murders. Forcing Jesus into having sex with his daughter Ocho, Soiken leaves the injured Jesus to be killed by the Tokugawa. Resurrecting Jesus into Satan at the cost of Ocho, he unleashes him and his squad of demonic warriors to start a global attack on humanity.
  • Ninja Scroll:
    • Gemma Himuro is the leader of the Eight Devils of Kimon, and stands out from his men in his callous disregard for all around him. In the past, Gemma betrayed his allies and framed a warrior named Jubei Kibigami, forcing Jubei to kill his friends in self defense. In the present, to cover for the Eight Devils' movements, Gemma has a well poisoned to wipe out a village. He organizes multiple massacres and kills his employer, declaring he himself will be the true ruler of Japan in the end. Gemma also kills Jubei's beloved, Kagero, in front of him, solely to hurt Jubei. Gemma, in the end, cares for nobody. The deaths of both his lovers in the Eight Devils arouse no emotion in him, and he witnesses every ally he has die without even changing an expression. His only concern is the gold imported to Japan, all to feed his bottomless greed.
    • Tessai is, hands down, the most violent, brutal and nasty of the Eight Devils of Kimon. A hulking brute of a man with skin he can harden into rock, Tessai is introduced butchering a group of shinobi who are investigating the village he and his seven comrades poisoned to manufacture rumors of a plague. The leader, Hanza, is caught by Tessai and killed sadistically as Tessai slowly rips his arms off with his bare hands before drinking the blood from the severed arms. Leaving only the sole woman of the group alive, Tessai takes her to his home and attempts to rape her, informing her not to struggle because "he wouldn't mind raping a dead girl." When Kagero is rescued by Jubei, a humiliated Tessai later makes it a point to hunt down Jubei and attempt to beat him to death in retribution.
  • No Guns Life anime: The nameless Extended, debuting in "Phantom Limbs", is a racist guard for Berühren tasked with painting terrorist group Spitzbergen as killers without a cause. To do so, the Extended swaps out a train full of Berühren employees that was to be bombed by Spitzbergen member Colt with a train car full of innocent protestors and orphan choir children. Preparing to have them killed, the Extended shoots Colt when he tries to stop disarm the bomb, mortally wounding him in the process. Returning in the series finale "Earnest Desire", the Extended shoots Pepper's arm off in an attempt to take her and Seven out to keep Berühren's reputation intact.
  • Noir: Shao-Li, a assassin for the Triads, is infamous for her poisonous methods and remorseless attitude towards her kills, receiving the nickname "The Cold-Blooded Killer". Introduced after one of her assassinations, Shao-Li is called by her forces to help deal with the duo assassin Noir and the Soldats due to their presence in Hong Kong. Tracking them down by using an informant, she leads a charge to kill the two hired killers and eliminate the informant, since he's no longer of any use to them. When Noir was able to fight off the attackers, she retreats and returns to his employers only to kill them off herself so she could realign with the Soldats and save herself. Approaching them, she was immediately rejected due to her history of backstabbing, and in retaliation Shao-Li tries to kill their representative. Even to the ruthless and unscrupulous Soldats, Shao-Li was seen as nothing more but a deadly poison for anyone and everyone.
  • Now and Then, Here and There: King Hamdo plunders resources from a desperate land and kidnaps children to use as soldiers in his army. Introduced strangling his own cat to death, Hamdo reacts with psychotic glee upon learning his men have found a girl who possesses an amulet capable of creating water, a precious resource in his time. When he discovers she's lost said amulet and refuses to help him find it, Hamdo flies into a rage and is implied to rape her. So cowardly that any threat to his life sends him into a panic, Hamdo orders his second-in-command to fire upon the frontline, not caring that his own Child Soldiers are engaged in combat.
  • Nura: Rise of the Yokai Clan: Sanmoto Gorozaemon is initially a member of Hagoromo Gitsune's entourage, but in truth pursues his own agenda. Formerly a human merchant in old Edo and suffering from boredom, he opted to dabble into the dark Hundred Tales' clan's power to unleash a swarm of Yokai (supernatural creatures) that terrorized the nation through indiscriminate killing while Sanmoto brainwashed high ranking officials into his own personal cult. When cornered by the past hero Rihan Nura, Sanmoto opted to become a Yokai himself, resulting in even more death and destruction. In the future, Sanmoto secretly worked with the true Big Bad Abe no Seimei, transforming Rihan's first wife into an assassin to murder him in a child form, gloating over how she murdered the man she had loved while looking like the child the two could never have. Unlike most of the villains who either brainwashed or had aspirations of creating a paradise for yokai, Sanmoto was merely a vulgar man with a god complex who terrorized Edo for his own greedy ambitions. Even a side story delves into how vile he is: when he is rejected by a lady who disliked him, he responded by killing off her family and friends and then picked her up when she was destitute and mentally scarred from the ordeal.

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