Ax Crazy / Fan Works

Crossover

• Broken Dimensions Continuity (The Amazing World of Gumball & Marvel Universe & Spawn): The Green Goblin is a Mad Bomber that doesn’t look to have any plan but fight and destroy all he can and fight anybody who attempt to stop him, he neither follows other’s plans when is on a team or working for somebody; Mister Negative and Mysterio also start acting a bit like this when attack Elmore, using their powers to blow up everything and everyone in their way.
• Children of Time (Doctor Who & Sherlock Holmes): Dalek Caan in the fic version of "The Daleks in Manhattan"/"Evolution of the Daleks". Cold-Blooded Torture, Redemption Rejection, & etc. As a result, he's hoisted by his own petard in the end.
• Equestria Girls: Friendship Souls (Bleach & My Little Pony: Equestria Girls):
  • Poesy, at least when she's activated her Shikai, loves to cut her opponents. Otherwise, she's very passive and kind.
  • The Fourth Espada. Ember claims the guy is NOT a stable person; saying he's unpredictable, prone to very violent mood swings, an extremely short fuse, and has killed other Hollows simply for being near him at the wrong time. That's not to say it's impossible to reason with him, but he has some high standards to hold to and Adagio is basically walking through a minefield during her first real conversation with him.
• Mirai SMP: Techno spirals into ax-crazy behavior towards the end of the story, as after a meeting with God there is now a part of him that desperately craves violence and death. This causes him to go on the offense and actively begin hunting players, and even turn against his own friends.
• My Hero Academia: Unchained Predator: Subverted for the Slayer. He is adept at carrying out wholesale massacres without any care for property damage or the consequences of his actions. Justifiably, he is perceived as a walking death zone by the heroes. However, the man is capable of discerning hostages and civilians from enemy combatants, and unlike the heroes, has no qualms using deadly force if it means the hostages live. Nezu outright admits that the Slayer is an enigma to him, for the man is brutal to his enemies, but not to civilians.
• The Night Unfurls:
  • Subverted for the Hunter. He is adept at carrying out savage butchery without a hint of emotion. No glee, no agitation, no rage, and no remorse. Justifiably, he is perceived as a walking hazard by the people around him, far too aware that he could simply decide that everyone should die and no one can stop him. Although the narrative often associates him with terms related to insane violence, like "murderous", "volatile", or "half-cut with blood", the Hunter's P.O.V. (which accounts for the majority of the story due to his status as The Protagonist) makes it clear that he is a lucid, level-headed individual who can discern between prey and innocent.
  • Shamuhaza is so crazy in his pursuit of the Eldritch Truth that he goes from experimenting on innocent civilians (the gory result being bodies either drained of their blood or ripped apart due to things coming out of them) to experimenting on the Leaping Lizards, the people who are supposed to be aligned with him. Any amount of his rational thought is thrown out of the window when he is transformed into an insect-like abomination.
• Shadows over Meridian: Tyrian starts out as a mere Cloudcuckoolander, but as he gets more focus, it's revealed that he's a psychotic religious fundamentalist obsessed with service to Jade, whom he views as his religion's prophesied goddess.

Disney Animated Canon

• Two examples in The Lion King Adventures:
  • Scar, after going completely insane in Friends to the End. He slaughters his hyena minions, including Ed, and rapes an innocent teenage lioness called Uzuri.
  • The Writer in The End, who becomes hell-bent on destroying the cubs. He even transforms into a petrifying combination of all the previous villains just to kill Simba.

Fusion Fic

• All For Luz (The Owl House & My Hero Academia): More than a few Quirk users are compelled to use their new superpowers in violent ways.
  • Jonah Smith, a Psycho for Hire for Tyler Wittebane, gets a little too joyous at hearing his next assassination job involves multiple kills.
  • Sophia Humbolt, another assassin, doesn't care if she has to turn half of Gravesfield into a pile of rubble and bloody corpses to kill her one target.
  • Some the kids in the Death Camp see the Deadly Game as an opportunity to use their powers in most lethal ways they can think of. Special mention goes to Kennedy, Darlene and Cody.
  • Even Luz can very much get like this when in her Roaring Rampage of Revenge mode. And its only gotten worse by All For One's influence, her severe PTSD and constantly put into Kill Or be Killed situations.
• Remnant Inferis: DOOM (Doom (2016) & RWBY): Quite a number of characters have a few screws loose and are prone to violent outbursts.
  • The Doom Slayer is an Unscrupulous Hero with a propensity for slaughtering his enemies in ways that are so gory and sadistic that even Mercury, a high profile assassin, is left horrified.
  • Marcus Black, the father of Mercury, is completely insane, as his vision of a perfect world is one of endless death and destruction. Not to mention that Mercury is reminded of him when he sees how sadistic the Slayer is.
  • As her Sanity Slippage gets to her, Ruby becomes more and more prone to psychotic outbursts. During their trek through Hell, she killed many demons with a Psychotic Smirk on her face and was extremely eager to unleash her wrath on them. Then when they get out, she later slices off Jacques Schnee's fingers in a fit of rage and smiles at the results of her actions, at least at first.
  • For the most horrific example in the entire story, look no further than Marv Talg the Incubus. Even with how violent and cruel demonkind already is, he's without a doubt the most insane demon thus far, and that's saying something. He makes many depraved threats, has committed far more depraved acts, such as rape, against several people just for fun, and the first thing he does after breaking free from confinement is snort crushed pills and human blood like cocaine and scream his name at the top of his lungs.

Game of Thrones / A Song of Ice and Fire

• Forum of Thrones:
  • Wolfius Woodbark, the psychopathic serial killer introduced early in Book 1. Over the course of the story, he shows absolutely no hesitation to act with utmost brutality, sometimes without any provocation at all. He is so unstable that his companions outright ditched him to make sur that he won't compromise their mission.
  • Kreep has signs of this as well. Most of the time, he shows no emotion at all, but his eagerness to get into a fight and the brutality he uss to dispatch his victims is unsettling, to say the least. Fittingly, he is revealed to be the son of Wolfius
  • Alysanne Waters is another example. She is as unstable as she is dangerous, a psychopath with a violent temper. One scene that sees her fighting against several men at once has her outright laughing at the violence around her.
• Robb Returns:
  • Viserys Targaryen, especially after he is given a huge (fake) dragon egg. In Chapter 70, he completely snaps and attempts to awaken his dragon by murdering one of Illyrio Mopatis' servants and then his own sister.
  • Readers get to see into Lysa Arryn's mind after she (nearly) murders Jon. Mind-scattered is the least of the problems she has. As one reader commented, "Lysa's mind gives me cancer".
  • The ancient Valyrian who calls himself 'the last Dragonlord', who commands a host of beast-headed men and is trying to capture a feral dragon.

Godzilla / King Kong / MonsterVerse

• Abraxas (Hrodvitnon):
  • Ghidorah's three heads (especially Ichi/Eldest Brother and Ni/Elder Brother) are no Adaptational Nice Guy here whatsoever — they get a kick out of tormenting and then killing anything they consider an enemy or just regard as beneath them with extreme prejudice, except in Vivienne Graham's case, where they torment her and then sentence her to a Fate Worse than Death. Ghidorah's backstory reveals it developed these tendencies as a result of being on the receiving end of systematic Being Tortured Makes You Evil, and afterwards being left with Terrible Ticking endlessly screaming in all three heads to "Kill Them All" until any other way of living was all but forgotten.
    • MaNi/Elder Brother takes this a bit further. Unlike Ghidorah, who has enough sense to recognize when to pull back and go on the defensive, all MaNi cares about is playing with Monster X in an ultraviolent way even if it's to his detriment, and he'll also attack anyone or anything with Monster X's scent on if he thinks it'll enrage Monster X into giving him more of a fun time.
  • Alan Jonah has an uncharacteristic psychotic episode in Chapter 5, when he performs a particularly nasty and mutilating experiment on Monster X and goes out of his way to try verbally ripping Vivienne to shreds for next to no reason, signifying his Sanity Slippage.
  • Word of God confirms that Gigan is set to appear in an upcoming Abraxas: Empty Fullness story. The author has also said Gigan's personality will be similar to Albedo in this clip: a Laughing Mad, violent sadomasochist.
• Abraxas Recursive Fanfictions:
  • This one-shot by cowabungaitis sees Jonah and one of his goons conduct an experiment on Monster X which involves essentially microwaving them alive... and once they're done, they promptly turn the device on a group of dissident Disposable Vagrants who have been doused in gasoline beforehand, as an execution method.
  • Abraxas: The Clash of Silver: Once Mechagodzilla is operational and is possessed by the half-Ghidorah Zmeyevich, it begins razing Hong Kong to the ground, and the Zmeyevich minds controlling it have every intention of rampaging over the entire planet afterwards. Though this is mainly due to Ghidorah's influence on the pair and their desire to please the old genocidal Sadist, the Zmeyevich's dialogue makes it clear that at least one of them if not both of them are going to enjoy every second that they're laying waste to everything in their path.

Infinity Train

• By the end of Chapter 20 of The Sun Will Come Up And The Seasons Will Change, any shred of reason and rational thought Nora had is completely gone, and keep in mind, she's sober throughout the entirety of said chapter. When she was on drugs and alcohol...

Invader Zim

• Karma Circle: Judgement: Gaz borders on this trope with how often she gets physically violent with people who bother her, get in her way, or just annoy her. And for the record, "annoy her" can mean anything as simple as talking too loudly near her or accidentally bumping against her.

Jurassic Park

• Jurassic What If...?: The behaviour of the Ultimasaurus is described as such: "The animal was unpredictable and irrational, its behaviour bullish and aggressive, its mind twisted and warped." When the creature escapes containment, the carnage and devastation that it causes within a short time makes the canon Indominus rex and Indoraptor look tame by comparison.

Kill la Kill

• Natural Selection: Ryuko Kiryuin, as a result of both her upbringing and being Mind Stitched and put haphazardly back together by Junketsu, is completely off her rocker. Every time she fights and even in her day-to-day life, she tends to display an absurd amount of sadism, and that's before getting into how many bodies are in her wake. It should also really say something that even with all that, her younger sister, Nui Harime, is considered far worse than she is.

The Legend of Zelda

• Wisdom and Courage features Veran, who clearly enjoys being a destructive, mass-murdering bitch far more than she desires to Take Over the World, to the extent that her very first thought upon arriving in Clock Town was to blow up the city and be done with it. Link even outright calls her insane on multiple occasions.

Mega Man

• Mega Man: Defender of the Human Race: Dr. Wily and several of his Robot Masters are this. Both Wily and Bass love the sound of screaming, and Splash Woman goes berserk after Roll attacks her and threatens to destroy the entire cavern to get rid of her enemies.

My Little Pony

• In Austraeoh, this is a good descriptor for what Rainbow Dash turns into if her Element of Loyalty pendant is removed. The longer it's gone, the more she will begin to turn into a Discord-like being of Chaos, only a lot less playfully insane and a lot more violently insane. When she's freed from a Ledomaritan fascility that was studying her, she proceeds to cheefully joke and laugh while violently slaughtering her way past any guard unlucky or stupid enough to get within her line of sight.
• The Immortal Game: Nihilus, Twilight Sparkle's Superpowered Evil Side, is absolutely batshit crazy.
• My Little Mages: The Nightmare's Return: Has resident former Wonderbolt turned captain of the Shadowbolts Nightshade. She killed several of her fellow Wonderbolts just because Spitfire was named captain over her, and only agreed to join Nightmare Moon when promised that her job would be to kill people. When trying to recruit Rainbow Dash, she even encourages her to be a Bastard Understudy, fully expecting to one day be killed by her, and sees nothing odd about that.
  • When Pinkie is exposed to the Heart's Desire by her father, she basically turns into her Cupcakes (Sergeant Sprinkles) self. Fortunately, she is just barely able to retake control before killing Twilight.
• Pony POV Series: Dark World!Fluttercruel. Being what normal Fluttercruel might have been if she had been raised by Discord, Fluttercruel is a sadistic Psychopathic Manchild who gleefully does Discord's bidding because she loves killing ponies. Her default reaction to something frustrating her is basically 'pull out large, deadly weapon, and slice target of frustration in half'. Oh, she has a 'playroom' where she basically reenacts Cupcakes (Sergeant Sprinkles), complete with cannibalism. She's so Ax-Crazy even Discord is trying to get her to mellow out...because he considers outright murder boring and doesn't want to run out of toys.
• Pony POV Series Recursive Fanfiction Pony POV Series Chaos Verse: Nightmare Phobia, the Big Bad, is this trope in spades. And it's not helped at all by the fact that the more powerful she becomes, the more her memory is corrupted, which in turn only fuels her insanity more.
• Sunset of Time: The Big Bad, Vesper Radiance. She's an insane psychopath who has personally murdered several characters already, attempted to kill even more, and her victims include her own parents out of revenge for putting her in an orphanage as a foal.

Naruto

• A Growing Affection has the self-named Reaper of Shinobi. She thinks that anyone who uses chakra (herself included) is a demon, so her goal is to kill all ninjas and then kill herself. Over the years she has come to believe the backstory she fabricated for herself (that she is the sole survivor of the destruction of her village in the last war).
• Kitsune no Ken: Fist of the Fox: Utakata, a.k.a. Saiken the Slug, is this. In fact, before he underwent the training that gave birth to the Kyuushingai, he was a homeless man with serious psychotic issues, but he had the presence of mind to hide that fact from the doctors and scientists who worked on him and the other eight members of the group. The end result...
  Utakata: They allowed a psychopath like me to be transformed into a SMART psychopath.

Ranma ½

• The classic Dark Fic The Bitter End gives a Cerebus Retcon to Akane Tendo's Tsundere attitude as undiagnosed and untreated explosive rage disorder, which only gets worse after she marries Ranma Saotome. She becomes the abuser in a Domestic Abuse scenario that Ranma is unable to deal with because of Double Standard (he is able to get in an abuse support group but he first has to demonstrate his curse so he won't be turned away, and that is as far as he is able to get "official" help) and the titular "bitter end" happens when Akane encounters Ranma with one of his floozies (Ukyo Kuonji talking to him as two old friends and that is all it was) with a katana within arm's reach.

RWBY

• The Makings of Team CRME:
  • Marcus Black is a sadistic assassin and the abusive father to Mercury (who calls him a psychopath several times). Marcus specifically joined the Atlesian military just to kill people. And when he was discharged from that profession, he went to being a Professional Killer to sate his bloodlust. He enjoys fighting people and has violent outbursts often that he takes out on Mercury and his wife Melanie. He's also an avid torturer and will even take extra pay if someone wants the victim to suffer. In CRME, a par patron said that he killed three people at a bar he frequented. His ax-craziness comes to the forefront when he attempts to kill Mercury.
  • Neopolitan is even more sadistic in violent in this series than she is implied to be in canon. She takes a lot of pleasure in killing people for Roman and likes cutting people up. Even when Roman tells her to stop, she still has to get one last stab in. Neo will always suggest killing people whenever Roman has a problem and gets let down whenever he says it won't be necessary. Roman lampshades this by saying that she'd likely be a serial killer if she didn't work for him. And it turns out to not be exaggeration. In CRME, she was seen randomly killing people to pass the time while Roman was in jail.
• A Rabbit Among Wolves: Adam Taurus, as in canon, was quick to indulge in violence. He was even willing to execute captives through decapitation.
• 'Ruby and Nora: Many'' villains, both Original and canon, count, but none more than this story's version of Neo. She's a sadistic maniac who's introduction includes a level of violence that can only be described as absolute Gorn. When she hijacks an Atlesian airship, she has her fun blowing ships out of the sky.
• Vale's Underground:
  • Tyrian Callows is a deranged Serial Killer who is known for dismembering bodies. He was picked up by Torchwick to aid in harvesting bodies for his organ trade. Hazel says that being able to kill will be enough payment for him and he needs to be told to only slit throats as to not damage vital organs. He unfortunately can't keep his impulses under control when he's not on the job since he was responsible for a number of dismemberment that Blake and Sun were investigating.
  • Adam "the Bull" Taurus is a human trafficker who is known for his Hair-Trigger Temper. He will kill his own workers with little provocation and spends his downtime violently raping some of the girls he traffics.
  • The mob boss only known as "Cinder" has better control over her impulses compared to the two examples above. However, the fact that she gets sexually aroused by violence does not reflect mental soundness. She may be pragmatic, but she's definitely eager to commit violence when she can get away with it. Whenever she lets herself cut loose, she shows the trope in full.

Sonic the Hedgehog

• ''Sonic X: Dark Chaos': Tsali. While moderately calm and even somewhat civil when he's not in battle, all bets are off in a fight. His greatest joy is murdering Seedrians in the most gory ways he can think of; everyone else is fair game too. And as the story goes on, the "Crazy" part comes to the forefront.
  • The Muslims are basically an entire faction of violently insane pedophile fundamentalists.

South Park

• Like Pinning Butterflies: Craig Tucker murders six people (eight if you count that he killed Kenny three times) and feels absolutely no remorse. He also kidnaps, tortures, and almost kills his crush.

Super Mario Bros.

• Clash of the Elements: Joe Dark is a very prime example of this trope and this very trait of his is amplified immensely after he gains the Dark King's powers.

Turning Red

• In Turning Red: Secrets of the Panda, Jason Vaugn, not so much at the start of the story, but as it progresses, shows himself to be a murderous psychopath who will kill anyone who gets in his way in order to achieve his goals.

Vocaloid

• Rotting Camellias: Mayu, a knife-thrower in a circus who seems to be this.

Whoniverse

• Gemini: Captain June Harper, Villain Protagonist of this Doctor Who story, is a Serial-Killer Killer on the run from the Time Agency that she used to work for. She maims, tortures, and murders anybody she that deems to be threatening the innocent, and she takes great pleasure in the pain and fear that she inflicts on her victims.

Unsorted

• Anyone that breathes in the Giygas gas in Attack of Giygas. As for named characters, we have Dr. Mario, Pichu, Ashley (who claims that she's sane), Lucas, and Link.
• Batman Beyond Revisited: The appropriately named OC, Chainsaw, a leader of a Jokerz gang that thrives on torture and murder to the point that the Joker himself would be disturbed.
• Boiling Isles and Beyond:
  • Bloudhound is a sadistic Psycho for Hire who kills for profit and fun.
  • The Salesman gets rather rabid about some his employees stealing from him.
  • Tibbles previous defeats have left him quite unhinged.
  • Boscha is a abusive, murderous sadist of a girl with a Hair-Trigger Temper.
  • Odalia Blight has a short fuse that results in an explosive rage. After Amity comes out, she screams for Warden Wrath to kill Luz and the others. Even Alador wasn’t expecting her to be so blatantly homicidal.
• Viktor Kraber in The Conversion Bureau: The Other Side of the Spectrum. He's an alcoholic, has committed multiple acts of terrorism up to and including mass murder, and displays utter glee at the prospect of murdering the TCB!Elements of Harmony with his BFG. Even worse? He's one of the good guys, and a solid product of Lowered Recruiting Standards. Justified in that he's very deeply traumatized due to having lost his children to TCB!Pinkie, and the war against TCB Equestria has broken almost every other surviving human in some way or another. Plus his Blood Knight nature is kept strictly towards targeting his enemies, and he does have Aegis to help keep him in check.
• In Supergirl fic Hellsister Trilogy, Satan Girl is a Supergir's duplicate, the embodiment of Kara's dark side with no conscience or restrain to control her murderous impulses.
  Kryptonians could survive in space without a suit. Was that not a pleasure? It certainly was. She could live her life between the stars, and never once need to breathe.
  She could devastate planets, wipe them clean of life. Rebuild them at her whim.
  She could tyrannize worlds, whole systems of planets, make them bow to her mighty hand, instantly execute anyone who dared protest—or just anybody she wanted to kill.
  She could explore pleasures of the body that Kara never would have dared to, satisfy lusts that the blonde beast never even knew she had. She could force herself upon any suitor, male or female or whatever, and destroy them after their job was done. Or perhaps just maim them, so that they could never again do such a job for anyone else. Satan Girl smiled. Now that was being imaginative...
  She could have children from those couplings, or kill them in the womb.
  She could become a goddess to an unsophisticated planet's people. Drinking in their worship, demanding sacrifice.
  All of this she could do, she would do, and more.
  For Kryptonians and Daxamites were gods, off their homeworlds. They really were. What a pity their morality forced them not to realize that fact.
  She clasped her bent knees to her chest and thought. The problem was, in this time, she was hardly unique. Billions of Kryptonians existed on Rokyn. Billions more Daxamites, with the same power, existed on Daxam. Luckily, there was only one prisoner still left in the Phantom Zone, that old poop Gazor, so there wasn't much competition there.
  But, somehow, she'd have to do something about both planets. Daxam would be easy. A shower of leaden hail across its surface, and the dead would litter the ground in heaps beyond Hitler's and Stalin's dreams.
  That world would stink of corpses for eons to come.
  She laughed soundlessly.
• In Here There Be Monsters: Georgia Sivana is a murderous, gun-loving loony. She is willing to spend hours shooting Marvel Family dummies until there is nothing left of them, and she gets crestfallen when her father tells her she is not allowed to kill her older sister.
  A succession of pistol shots were heard. He jerked his way in their direction.
  It was his daughter. Georgia was holding a smoking automatic. Before her were three scarecrows, planted in the alien soil, dressed in makeshift uniforms to resemble Captain Marvel, Captain Marvel, Jr., and Mary Marvel.
  All of them had their heads shot off.
  The Mary Marvel scarecrow was also dribbling stuffing through its stomach area.
• Hope for the Heartless includes as minor antagonists a pack of more than thirty Savage Wolves, fittingly called the Mad Pack. They have terrorized the wildlife and farmers of Prydain for the last twenty years, increasing in numbers over the years. They suffer from an incurable disease similar to rabies, which has robbed them of all reason, fear and natural instincts. They live only for killing, rarely touching the meat of their killings. When they get the taste of blood, nothing can discourage them from the hunt. They attack and kill anything that moves — big cats, bears, entire wolf packs, any forest animal they can sunk their teeth into, livestock and humans (even a human village). Heck, they even attack the Horned King who strikes fear in every living creature.
• Inner Demons: After Twilight is consumed by her Queen persona, she becomes an extremely mentally unstable sociopath who switches between cold emotional detachment and blind fury at the drop of a hat. It gets to the point where she even decides to kill her brother when he rejects her advances.
• Soichiro Yagami in Light and Dark The Adventures of Dark Yagami, holding a knife to Mikami's neck "like the Joker".
  • And that's before her Villainous Breakdown. Afterwards, she's left constantly switching between laughing maniacally and sobbing (it's actually implied that's her true personality trying to resurface and being forced back down by the Queen), and on top of that she's decided that rather than ruling Equestria, she'll destroy it.
• Noah Maxwell Takes A Little Trip Here has both an heroic and villainous example in Noahbrand and Patrick Andersen.
  • When Noahbrand appears for the first time he literally sears his handprint into Patrick's neck and seems to take unholy glee in watching Patrick burn. He does seem to be mostly good, though, seeing as he spared Patrick after learning about Michael.
  • Patrick, however, is a straight-up villainous example. He stalks Evan, seems to have creepy tendencies towards everyone in Team CTNE save Caught, and is quite frankly even creepier than he was in his original work.
• Pacific: World War II U.S. Navy Shipgirls has Phoenix, who is also a Pyromaniac.
• Pages Of Harmony:
  • Twilight Sparkle is the prime example, though Rainbow Dash is definitely no slouch in that regard either. Twilight basically tortures and Mind Rapes her friends to extract their Elements, becoming increasingly deranged the further she goes down the road. Rainbow Dash, the first killed as a result of Twilight's actions, has her memory twisted and warped to the point where she cannibalizes herself as a result of no longer having Loyalty to even herself, and swears that she'll find a way to kill Twilight for what she did. Not to mention, as is revealed during Fluttershy's extraction session, Twilight intends to "cleanse" the universe (and the multiverse if it exists) by destroying all living beings without the genetic capacity for the Elements of Harmony. And she's convinced in her mind that it's all for the greater good.
  • Speaking of Fluttershy, she reaches Ax-Crazy after Twilight's completely extracted Kindness. She kills her pets in a violent fit of rage, tearing them apart into bloody messes with no regard for any of their lives, before she attacks Twilight and wounds her, the latter Laughing Mad all the while and trying to fight back before Fluttershy dies. And she does this while having wounds from being sliced apart, burns from various procedures, one eye destroyed, and half her limbs missing from chemical use.
• Hitomi Kirihara in Perfection Is Overrated is a deconstruction of a Jerk Sue who sees nothing wrong with using Mind Control to steal from her victims, force them to commit unspeakable crimes, and then make them kill themselves. Her fellow SUEs are disgusted by her behavior, partly out of justified fear that she will turn on them.
• In Prison Island Break, Shadow is a completely unpredictable psychopath. It's for a good reason though; he was locked in the Hole with Scourge after attempting to escape, Scourge basically being Ax Crazy and Nightmare Fuel given physical form.
• Roar of the LION: Inori is violently unstable, and commits all manner of horrible atrocities and inhumane experiments, both For Science! and her own sadistic amusement. Even when working with Cinder and the White Fang, she regularly kills their minions for the sake of experimenting on their corpses, largely to use them as power sources for her machines. She's so depraved and monstrous that when Emerald and Mercury break into her lab on Cinder's orders, they're appalled by what they find inside; even Adam Taurus of all people is disturbed by her.
• Rosario Vampire: Brightest Darkness:
  • Tsukune's ghoul form counts to a T. In Act III chapter 52, when unleashed, he proceeds to brutally dismember and disembowel Kiria with his bare hands, laughing while he does it.
  • Jovian and Jacqueline Kikion also qualify, particularly the originals who served Hokuto. In Act III chapter 52, when Hokuto warns Felucia that Jovian will kill Ruby and Tsukune if Felucia won't hold them back, Jovian gleefully cheers that she loves killing. The resummoned Jovian and Jacqueline in Act VI are considerably more mellow.
  • Arial Kuyumaya often comes across as this in Act VI, in part due to her Hair-Trigger Temper and obsession with Dark; in chapter 7, the very first thing she does as soon as she discovers that Mizore is Dark's girlfriend is use her ice claws to literally tear Mizore apart in a jealous rage right in front of everybody; by the end, Mizore is so horrifically injured that Ceal has to transfer organic matter from deceased HDA officers to actually heal her. The others even outright describe her as insane on more than one occasion.
  • Even without chrono dementia, Evil!Falla is a sadistic, sociopathic bitch who can slaughter people by the handful without hesitation, while laughing about it.
  • As revealed in Act VI chapter 52, the Fairy Tale-created clone of Moka is little more than a savage animal.
• A Shadow of the Titans: ( A Jackie Chan Adventures and Teen Titans crossover fic) Gadjo is completely psychotic, to the point that even the rest of the HIVE find him disturbing. He tends to be paired up with the similarly crazy villainess Machete.
• Professor Hojo Okokou in Sephirothslave's Shinra High SOLDIER definitely counts. He gets more and more violent and crazy as the story progresses.
• Daemon from the Tamers Forever Series could be the posterboy for this trope, a nigh unstoppable psychopath who is fuelled by his own hatred, often exploding into violent rages and laughing maniacally at the sight of others in pain.
• Blaze from Team LVDR is a vile Sadist who kills for fun.
• In Thousand Shinji, Asuka is a rare heroic -or rather anti-heroic- example. After becoming a worshipper of War God Khorne she was gradually turned into a psychopatic, blood-thirsty, axe-wielding berserker. However, although she went on a killing spree, she exclusively targeted thugs, rapists and drug-dealers, and she killed them because she was trying to save her boyfriend.
• In the opening pages up Uplifted: Arrival Joachim Hoch ties noted real life Nazi War Criminal Oswald Pohl to his bed posts and proceeds to behead him with an axe. He then has the head sent to Berlin as a warning.
• In the Valkyrie on Fire series, Glimmer affirms that Cato and Clove came across as this to her, recognising them as stone-cold killers who would be too dangerous for her to face alone when the Career alliance broke up.
• Urotsuki is portrayed as this in hyperiinuyasha's stories. She's completely murderous toward anyone that she doesn't like, and even if she likes you, it doesn't guarantee your safety. The other characters rarely like her.
• Gentaro Kisaragi and Ryusei Sakuta get onto this in Horseshoes and Hand Grenades for different reasons: Gentaro was killed by Ryusei and resurrected by Ophiuchus because he was supposedly left to die by his friends. Ryusei, was brainwashed by Emoto and then reconfigured into a cyborg with the sole mission is not yet revealed.
• Reaper isn't all that sane in Overwatch canon, but Break My Heart, Break Your Heart amplifies his instability and murderous tendencies. Nearly all of his scenes in the fic far surpass the game's usual levels of violence, and he is terrifying.
• Blazing Revolution: Yamato, who serves as Sugou's Dragon on multiple occasions. He thrives on Cold-Blooded Torture, freely admits to Alice that he Loves the Sound of Screaming, and actively assists Sugou in all of his twisted actions.
• Several characters in You Got HaruhiRolled!. The fic follows canon in portraying Ryouko in this way, but in addition, Haruhi is occasionally Flanderized into this trope, such as when she threatens to kill Kyon's sister for dishonoring the SOS Brigade. Additionally, Sasaki usually functions as the Only Sane Woman of her group, but in the chapter where she finds a Death Note, she arguably out-crazies Yagami Light himself.^note Though this is only implied, rather than outright stated.

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