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Founder and Leader

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    Muzan Kibutsuji 

Muzan Kibutsuji

Voiced By: Toshihiko Seki (JP), Greg Chun (EN)
Live actor: Yoshihide Sasaki (Stage Play)

https://static.tvtropes.org/pmwiki/pub/images/muzan_encountering_tanjiro.png
Click here to see him as a woman 
Click here to see his aged form (MAJOR SPOILER WARNING

Muzan is the first demon and progenitor of all of the other demons.


  • Absurdly Sharp Claws: Having sharp claws is expected as a demon for him. But his new form in chapter 180 shows that he's also got sharp toe claws along with his finger claws and he's become even more powerful with them.
  • All for Nothing: Muzan spent his immortal life trying to find the Blue Spider Lily used for the medicine that turned him into a demon with no luck. As the final chapter reveals with modern research, the Blue Spider Lily was real, but only grows for a few days in broad sunlight, impossible to obtain for a demon who burns in sunlight.
  • Ain't Too Proud to Beg: After transferring his blood to Tanjiro and turning him into a demon, Muzan's cells continue to live on within him and influence his behavior as a demon inside his Mental World. Once Tanjiro is injected with an antidote, Muzan begins losing control and no longer has any power over Tanjiro as he regains his will, so he resorts to telling him Blatant Lies about his fallen comrades hating him for surviving, which Tanjiro refutes as nonsense. As Tanjiro is about to fully turn back human, Muzan spends his final moments desperately clinging to Tanjiro's mental form as it rises to the light, pathetically begging not to be left all alone before losing his grip and dropping into the darkness of hell.
  • Archenemy: He has three: the current head of the Ubuyashiki family, the Demon Slayer who nearly killed him 400 years ago, Yoriichi and Tanjiro who is trying to get revenge on Muzan for killing his family and for turning his sister Nezuko into a demon.
  • Authority Equals Asskicking: The most powerful of the demons.
  • Ax-Crazy: Get on his bad side and he will slaughter you. Don't get on his bad side, and he will still slaughter you. Muzan truly cares not from whom the blood flows, only that it flows.
  • Bad Boss: He sucks as a boss. Even mildly contradicting him can result in an agonizing execution.
  • Badass in a Nice Suit: Downplayed. While he does favor wearing fashionable suits, it's only for disguising himself and he's never shown to actually fight in any of his suits.
  • Bad People Abuse Animals: In case you needed another example of why Muzan is a bad guy, he is shown coldly and brutally injuring Tamayo's cat familiar Chachamaru and killing one of Kiriya's Kasugai crows during the final arc.
  • Bad with the Bone: The Combat Tentacles that Muzan utilizes are made from masses of bone and flesh, and the tendrils that he sprouts from his spine and femurs have their blades made of bone as well.
  • Battle in the Center of the Mind: A variation occurs as the final confrontation between Muzan and Tanjiro, as it is not a flashy action sequence, but a quiet and somber battle between their ideologies in their shared Mental World. After Tanjiro is injected with the demon antidote, Muzan tries to have him resist it's effects by convincing him to accept his new form as a demon. First he tells Tanjiro Blatant Lies about how he had killed Nezuko and his friends during his rampage, then he tries putting him through a guilt trip about his fallen comrades resenting him, before resorting to petty insults about how Tanjiro is throwing away his chance to be a perfect existence, fully displaying his horribly selfish worldview in his attempts to convince Tanjiro. Tanjiro's selfless beliefs shine through as he refutes all of Muzan's claims and offers, ultimately resisting with the help of the spirits of his family and all the people who he affected with his kindness, overcoming the demon blood within him and leaving Muzan to die alone.
  • Berserk Button: Dislikes being called fragile or sick. He kills a random passerby, Yacchan, for calling him sickly and pale, with the latter's brother and sister-in-law subjected to a Cruel and Unusual Death. Granted, considering his sociopathy and Hair-Trigger Temper, he'd have probably killed them anyway.
  • Big Bad: The arch-villain of the story and the chief demon.
  • Bitch in Sheep's Clothing: As "Tsukihiko", he comes off as an impeccable gentleman and a considerate family man. He likewise plays the role of a quiet and studious young boy named "Toshikuni" very well. Beneath the facade, however, is a monstrous demon who only cares about himself. And he isn't even a family man because that wife and daughter aren't even his.
  • Bizarre Alien Biology: More like Bizarre Demon Biology, he is revealed to have 5 brains and 7 hearts after Yoriichi gazes upon him using the See-Through World, with a heart in each limb and several in his torso, and the two additional brains visible to the reader are in his neck and stomach.
  • Blood from the Mouth: Muzan starts bleeding profusely from him mouth and coughs up blood as Tamayo's drug begins breaking down his body while preventing him from regenerating.
  • Body Horror:
    • One of Muzan's unnamed Demon Blood Arts creates a large and long mass of grotesque flesh from his arm that comes with a giant mouth at the tip. The Lower Kizuki, unfortunately, get to see this up close and firsthand...
    • He was inside a cocoon made up entirely of his flesh and blood to recover his injuries sustained from Ubuyashiki, Tamayo, and Himejima, but as of chapter 180, he has recovered in a new form that sprouts pairs of jaws and teeth all over his arms and legs (and let's not forget the fact that he's also naked). It's not a pretty sight to see.
    • When Yoriichi fights Muzan for the first time, he uses his vision to see Muzan's inner structure and discovers that Muzan has seven hearts and five brains.
    • Muzan becomes desperate when fighting against the Demon Slayers and first forms a Belly Mouth across his torso. As Tanjiro and the others close in on him, he becomes so much more desperate, that he gets Fish Eyes and soon morphs his head into a large and wide grotesque Lamprey Mouth, complete with rows and rows of fangs inside of his mouth. This would make Pennywise proud.
    • When the sun starts to rise in the morning, Muzan makes it his number one goal to purely escape, so he envelopes himself into a mass of flesh to form a giant demonic baby body to protect himself from sunlight, complete with bulging veins and muscles.
  • Boring, but Practical: Considering that he is the origin of all demons and their blood arts his main fighting style during the final fight is fairly simple. Keep the demon slayers at bay with his long combat tentacles. Not as flashy as making or manipulating ice or controlling a pocket dimension but he is still the strongest demon that can fight several marked Hashira at once.
  • Break the Haughty: Muzan was throughly humiliated during his match with Yoriichi. Despite all his strength and the many precautions he took to prevent being beheaded, Muzan was nothing more than another demon to be slain before Yoriichi’s skill.
    • As Tanjiro reverts back to being a human he is reduced to begging him not to leave him alone.
  • Cannibalism Superpower: Muzan gains the powers of the demons he procreates by eating them. After Nezuko gains immunity to sunlight, Muzan makes devouring her his number one priority to become truly immortal by being invulnerable to the one thing that can ultimately kill him.
  • Cleavage Window: His patterned yukata in the flashback of Chapter 178 has a neckline low enough to expose a small amount of his chest.
  • Clipped-Wing Angel: The final form taken on by the Monster Progenitor Big Bad is... that of a giant, crying baby.
    • When the sun rises on the final battle, Muzan surrounds his body with a large amount of flesh to protect himself from the sunlight, and the flesh moulds into the shape of a giant infant that pathetically and aimlessly attempts to crawl to safety, with his only means of attack being to swing his baby arms at speeds that even the non-combatant Kakushi can easily react to. A suitable final form for someone whose entire existence was built around an infantile refusal to accept his own mortality.
    • When Muzan's full backstory is finally shown, his ridiculous final form makes a lot more sense. He was plagued by health issues even in his mother's womb, and was stillborn as result, but Muzan fought for life and began crying for the first time as his family was about to cremate his body. His final form as a giant, wailing infant didn't just represent his shattered Pride, it symbolized his will to fight and survive by any means necessary.
  • Combat Tentacles: Another of Muzan's Blood Arts sprouts 8 bladed tendrils that come out of his spine. These give Muzan more long reach and the blades of the tendrils are very sharp. He laters sprouts another 8 tendrils from his thighs that increase his offenses even further.
  • The Corrupter: Muzan lures in people at their lowest to become demons, twisting their emotional trauma so that they serve him wholly. Gyutaro, Ume/Daki, Hakuji/Akaza, and Michikatsu/Kokushibo are prime examples of this.
  • Creepy Monotone: He almost always speaks in a soft-sounding monotone, which makes him pretty unsettling whenever he's butchering someone.
  • Curb-Stomp Battle: His fight with Yoriichi Tsugikuni, the first Sun Breathing user, turned out to be this. Muzan is cut to pieces almost immediately and is unable to fully recover due to the Breathing's stifling effect on his regeneration. He is only able to survive by splitting himself into 1800 pieces and fleeing in terror, and even then Yoriichi is able to slice up 1500 of his pieces instantly. To top it all off, the wounds Yoriichi inflicted have not healed in the centuries since their encounter, acting as a permanent reminder of Muzan's helplessness and terror during that moment.
  • Curse:
    • Any demon that is created from Muzan's blood is bound by a curse that prevents them from uttering his name, lest they suffer a horrifying death.
    • It is revealed that Muzan brought the curse upon the Ubuyashiki family that condemns their members to die at young ages of sickness, due to him originally hailing from the family's ancestors before becoming a demon and spreading untold evil into the world. The illness that overcomes the family members is remarkably similar to the disease that Muzan suffered from as a human.
  • Dark Is Evil: Dresses primarily in black and is the first and evilest of the demons.
  • Deal with the Devil: He offers people the chance to become demons, forsaking their humanity and needing to devour others, in exchange for life or power. Kokushibo is a noticeable example, who was terrified of losing his sword skills to age and death, after which Muzan stepped in with his offer.
    • He attempts this against Tanjiro during their Battle in the Center of the Mind after he turns him into a demon, tempting him with the offer of immortality and supremacy over others, but Tanjiro refuses it all without giving any consideration for Muzan's selfish claims.
  • Detachment Combat: Muzan can split himself up into at least 1800 pieces that can move independently from each other. Using this ability to escape is the only reason he survives his encounter with the first Sun Breathing user. He attempts to do this again as his fight against Tanjiro and Iguro isn't going his way and dawn nears, but Tamayo's drug prevents him from splitting apart.
  • Devil in Plain Sight: Muzan likes to hide himself among human society by masquerading as one of several different human guises. Tanjiro is left baffled and horrified at how his "family" has been unable to detect his true nature as a demon.
  • Didn't See That Coming: Muzan's pride really comes back to bite him several times as it makes him greatly underestimate what his enemies are capable of when pushed.
    • He gets spectacularly blindsided by Ubuyashiki's suicide trick, which leads to the entire Demon Slayer Corps getting the drop on him. Tamayo also blindsides him with a perfect cure for demonism which, while not successful at reverting him right away, still makes him unable to fight. And forces him to summon his Demon Fortress in a desperate escape attempt, which promptly gets besieged by the full force of the Corps.
    • Before his fight with Yoriichi Tsugikuni, he callously declares that he has no more interest in Breath-using swordsmen and begins attacking. He never knew someone like Yoriichi could exist and gets utterly stomped.
    • Muzan first thought that the drug Tamayo injected him with only had the singular effect of turning him human, and once he overcomes it he believes he has won. To say that he didn't see it's multitude of secondary effects coming would be an understatement.
  • Dirty Coward: Tamayo believes everything he does is out of fear of anything that could hurt him.
    • And she's right. This also plays into his new demonic form, where he prioritizes long range in all of his Blood Arts to keep the Demon Slayers away from him. It’s even implied the reason he doesn’t fight the Demon Slayers himself is because he’s actually terrified of them, thanks to his one encounter with Yoriichi.
    • During the final battle, when the dawn is nearing and Muzan is unable to finish off the remaining Demon Slayers, he turns away and runs from the fight without a hint of shame before getting stopped by Tanjiro and Iguro. He also attempts to completely escape by turning into a giant demonic baby to shield himself from sunlight. The efforts of all Demon Slayers prevent him from escaping as his demonic baby form is turned to ashes by sunlight.
  • Disease Bleach: Muzan initially believed that his hair turned white from the strain of overcoming Tamayo's drug and the color would eventually return, but it remains unchanged throughout his battle with the Demon Slayers and he comes to realize that his hair actually turned white from the drug's secondary effect of rapidly aging his body's cells.
  • Disproportionate Retribution: It's very easy to get him to kill you. Just saying something, anything that somehow contradicts what he says, will immediately get you a violent death.
  • The Dreaded: The demon from Tanjiro's first quest is horrified when Tanjiro mentions his name. It turns out there's a good reason for this. On top of being a Bad Boss, the majority of his underlings can't talk about him without his cells in their bodies violently killing them for it.
  • Dual Age Modes: He can take the form of a young boy named Toshikuni.
  • Eerie Pale-Skinned Brunette: He's the Monster Progenitor of the demons. No matter what form he takes, he always has pale skin and jet black hair; in fact, calling him sickly and pale is his Berserk Button. As of chapter 180, he has white hair now thanks to the aging poison.
  • EMP: When pushed to his absolute limits in the final battle, Muzan opens up a large, gaping maw on his torso which releases a burst of energy that is functionally similar to an electromagnetic pulse, as it shuts down the nervous and respiratory systems of anyone caught in the blast and leaves them on the ground paralyzed. This is an exceptionally powerful Blood Demon Art and Muzan notes that it is very taxing to use, especially in his weakened state.
  • Establishing Character Moment:
    • When Tanjiro runs into him for the first time, he acts completely innocent. He then swiftly swipes at a man walking by him, causing the man to turn into a demon and attack his wife. This forces Tanjiro to subdue the man, while Muzan casually walks away with his own family. Later, after brutally taking his rage out on some drunken passerby who insulted his appearance, he orders two of his underlings to kill Tanjiro because his earrings reminded Muzan of another slayer who almost killed him in the past.
    • His second major appearance is another one. Angered by Rui's death, he pulls a vicious You Have Failed Me on all of the other Lower Kizuki. During which he shuts down every attempt they make to plead for another chance because it means they're implying he just might be wrong about something.
  • Evil Cannot Comprehend Good: Muzan has a difficult time understanding selfless and heroic motives, to say the very least. He can't even understand why so many people hate him and want to kill him.
  • Evil Counterpart: Muzan is the lord of demons while Kagaya Ubuyashiki commands the Demon Slayers. It is apparent since he is possibly a distant relative from the Ubuyashikis. Muzan is a powerful fighter and possibly the strongest being alive despite being an evil coward at heart. On the flipside, Kagaya is physically weak (something that he hates about) but is an unbelievably kind, generous, and self-sacrificing man who makes it clear that he will give his life for his men and to the Corps' cause. Muzan is immortal while Kagaya is dying at age 23. Muzan cares nothing for his subordinates who serve him out of fear and fanaticism. Kagaya remembers the names, faces, and backgrounds of every demon slayer who dies, loving all of them like his own children. To top it off, the two of them are said to be physically identical, but Kagaya has a wide, horrific scar while Muzan is one of the least monstrous-looking demons.
  • Evil Wears Black: Muzan, the Big Bad, always wears black at least since the Sengoku Period.
  • Exotic Eye Designs: He has twofold slit pupils, with the outer part crimson and the inner part black.
  • Expy: Being a Dirty Coward demon that manipulates others and mistreats his subordinates makes him very similar to Inuyasha Big Bad Naraku.
  • Final Boss: He is the last big enemy the protagonists must face in order to finish their duty, and the plot's Big Bad. Upon dying, he passes his remaining blood and will into Tanjiro, effectively turning him into the new demon king and the biggest threat the remaining slayers must face, and the story's Post-Final Boss.
  • Genetic Memory: Those who receive his blood can experience parts of his memories. The reverse is also true, as Muzan can view the memories of anyone whose cells he had absorbed.
    • It's also how he intends to live on in a fashion through his successor Tanjiro.
  • Gender Bender: During a meeting after Rui's defeat, he appears in the form of a woman.
  • A God Am I: Implied. When Yacchan hits his Berserk Button, he calls himself a being infinitely close to perfection. When he expresses his displeasure at the Lower Kizuki, he claims that he's always right, he never makes mistakes, and telling him what to do is grounds for execution. He demands unquestioning, suicidal devotion, and the only way to get out of his wrath is to praise his name and claim that it's been an honor to be killed by him, basically being a fanatical worshipper. And when he faces Tanjiro, he even asks why Tanjiro wouldn't just move on since fighting him is futile, equating his atrocities to natural disasters aka Acts of God.
  • Hair-Trigger Temper: It doesn't take much to set Muzan off. Even mildly contradicting him can provoke his violent wrath.
  • Hate Sink: Everything about Muzan is despicable and horrendous.
  • Healing Factor: Expected from being a demon. However, his regeneration is even greater than those of the Upper Kizuki. He regenerates most of his body when he gets injured from Ubuyashiki's explosion and when he gains his new demonic form, his regeneration goes Up to Eleven, healing almost instantly even after Giyu, Iguro, and Mitsuri used their techniques successfully.
  • Hellish Pupils: His eyes are red with slit pupils.
  • Howl of Sorrow: Muzan in his giant baby form lets out a loud and anguished cry of pain as he's roasted by the morning sun's light.
  • How the Mighty Have Fallen: In his first few appearances, Muzan was presented as an all-powerful and dignified Man of Wealth and Taste who viewed himself as a supreme existence. However, by the end of the final battle he is reduced to taking increasingly undignified measures to ensure his survival and cling to life, culminating in him taking on the form of a giant, crying infant that attempts to crawl away from the fight, a very far cry from his position at the start of the series.
  • Hypocrite: He kills any of his demons if they’re scared of fighting Demon Slayers and yet Muzan is the one terrified of Demon Slayers to the point he refuses to ever come out of hiding. Which is likely due to his fight with Yoriichi, where Muzan almost died.
  • I Control My Minions Through...: Fear. Any demons created from Muzan's blood are kept under his thumb through sheer terror, as anything done to displease him will lead to a brutal death. Only the most powerful demons among the Twelve Kizuki are granted a degree of leniency, as strength is something he greatly values in his subordinates.
  • Ill Boy: As a human, he suffered from a disease that would kill him before he reached the age of 20. The medicine given to him by his doctor ended up turning him ageless as the first demon.
  • Immortality Seeker: While already an ageless demon, Muzan's ultimate goal is to achieve true immortality by conquering his weakness to the sun. This is why he is so hellbent on capturing and absorbing Nezuko.
  • Intangibility: Muzan is not intangible in the true sense of the word, but his healing prowess is so powerful that it creates the same effect. Any sword swings that actually come in contact with him appear to harmlessly pass through his body, as he can heal the instant he is cut. He loses this attribute as the final battle rages on, which, in hindsight, is the first sign of Tamayo's drug breaking down his body.
  • Interspecies Adoption: Muzan, a demon, lives with a human family while masquerading as "Toshikuni", though they think he's just a child with a skin condition. After he learns of Nezuko's newfound ability to survive in the sun, he butchers them.
  • It's All About Me: Muzan is horrifically self-centered in his viewpoints.
  • Jerkass: Muzan is shown to be an unpleasant bastard throughout the series. He belittles both the main characters and even some of his own demons.
  • Jerk with a Heart of Jerk: You would think his backstory reveal in chapter 127 would gain Muzan some sympathy points right? Well, that's definitely not the case. Muzan has been revealed to always have been an evil jerk for his entire life. In the past, when a doctor attempted to use an experimental medicine to cure his disease, he told Muzan that there was a possibility that he wouldn't be able to survive despite his efforts. Muzan ends up throwing a knife at the doctor out of anger.
  • Keigo: As "Tsukihiko", he speaks in formal Japanese, emphasizing his genteel and debonair demeanor.
  • Kick the Dog: While him turning a passerby into a demon to distract Tanjiro enough to escape when seemingly exposed was bad enough, what he did to that one lady was horrifically cruel. He had already escaped and vented his anger out on her brother-in-law, Yacchan, and her husband, the former of whom had insulted him, but she was entirely innocent, yet suffered the cruelest fate.
  • Know When to Fold 'Em: When the final battle against the Demon Slayers has dragged on to near dawn, Muzan decides not to put himself at further risk and flees from the fight despite not fulfilling his vow to wipe out the Corps, but his attempts to escape are thwarted by the teamwork of Tanjiro and Iguro along with the debilitating effects of Tamayo's drug.
  • Lack of Empathy: If you aren't Muzan Kibutsuji, he doesn't care remotely about your problems or your feelings. Especially evident in chapter 181. After all that he's done to Tanjiro and so many more Demon Slayers, he simply tells Tanjiro that he and the rest of the Demon Slayers should have kept quiet and walk away with a quiet life, as if they were victims of a natural disaster. Tanjiro becomes silently angered after hearing those rude and insulting words from Muzan's mouth, to the point he even declares Muzan must die.
  • Laser-Guided Karma: All of Muzan's sins had finally caught up to him in the final battle, where he is first disintegrated by the sun after the Demon Slayers successfully stopped him from escaping. Then, Kanao uses the medicine to cure the remains of Muzan that were injected into Tanjiro, where Muzan is finally shown to be sent to hell once and for all.
  • Magic Pants: When caught in an explosion created by Ubuyashiki, his upper body gets utterly shredded, with his shirt being entirely disintegrated and much of his flesh being burned away revealing muscle. Yet somehow, his pants remain completely unscathed.
  • Make-Up Is Evil: When in the form of a woman, he wears heavy mascara and a small amount of lipstick. He also happens to be the first and most evil of the demons.
  • Man of Wealth and Taste: When not in the form of a woman or child, he wears Western-style formal wear in opulent patterns. He also happens to be the Big Bad and the Monster Progenitor of the demons.
  • Manly Tears: In his dying moments, Muzan reflects on Kagaya's final words and how they proved true over the course of his fight with the Corps, and is deeply moved to the point of shedding tears as he thinks of their display of trust in each other and their determination to stop him at all costs.
  • Meaningful Name:
    • His name Muzan literally means "cruelty", while Kibutsuji contains the kanji for "demon".
    • When encountered by Tanjiro, Muzan plays the role of a genteel and debonair merchant by the name of Tsukihiko, which combines the Japanese words for "moon" and "a male child of noble blood, a prince". The "moon" part may have something to do with his demonic inability to survive in the sun.
  • Mental World: During the final battle, Muzan enters some sort of abstract space within his mind where he communicates with the cells of Tamayo that he had absorbed, forming them into the shape of her head. When she refuses to talk, he is able to view the memories held within her cells to get the answers he needs. He does all this within the span of seconds while he is fighting Tanjiro in the real world.
    • Tanjiro inherits this attribute after being turned into a demon with Muzan's blood, and it serves as the setting for their final confrontation as Tanjiro is being healed by the antidote and Muzan struggles to convince him to accept his status as a demon.
  • Moral Myopia: He thinks Yoriichi is a monster for possessing tremendous skill that actually can harm him. Says the Humanoid Abomination with multiple brains and hearts, who slaughters innocents, foes and even underlings indiscriminately.
  • Morphic Resonance: He is always an Eerie Pale-Skinned Brunette in his various forms. His female form retains his unusual eyes and delicate features, both of which he changes to look more natural as the child "Toshikuni". His eyes revert to their distinct red appearance when he speaks to Akaza.
  • Mortality Phobia: Muzan's fear of death has driven his heinous actions for his entire life, with there being no low he wouldn't stoop to in order to avoid facing his own death.
  • Monster Progenitor: He is the one who created the demons, though he states that he actually hated doing it, but had to in order to find either a demon that could withstand the sun or the main component in the elixir that made him a demon in the first place. If there's a reason why most of the Demons in this series are quite twisted in terms of morals and sanity, then it can be all traced back to him.
  • Monstrous Cannibalism: He not only eats humans but also he is willing to eat his own demons. He eats Kamanue and Mukago alive for being cowards and weak Lower Kizuki, not to mention his to plan get Nezuko's newfound immunity to the sun for himself by eating her.
  • Names to Run Away from Really Fast: Muzan has a number of negative meanings such as "miserable", "pitiful", and "merciless". Kibutsuji begins with the kanji for "Oni", which is what the series' titular "demons" are known as in Japanese.
  • Narcissist: He thinks that he alone is the perfect being in the world. Any contradiction to his world view is met with instant death.
  • Nice Job Fixing It, Villain!: Muzan's final attempt to spite the Demon Slayers, turning the dead Tanjiro into a demon to continue his legacy, is undone swiftly thanks to the efforts of Nezuko and Kanao. In the end, all Muzan accomplished through this act was reviving one of his greatest enemies and healing him back to perfect health, along with suffering his greatest humiliation as he pitifully begged Tanjiro not to leave him to die alone. Tanjiro would've thanked him for it, if not for Muzan's countless crimes and his less than existing morals, he has nothing but contempt against him.
  • No Celebrities Were Harmed: His appearance as "Tsukihiko" closely resembles Michael Jackson, especially from the Smooth Criminal music video.
  • Noodle Incident:
    • In the past, he encountered a Demon Slayer who wore the same kind of earrings that Tanjiro does. While the encounter isn't explored (though it was apparently the closest Muzan ever came to being killed), he's paranoid enough to order Tanjiro's death upon seeing them. This is because the earrings identify Tanjiro as someone related to the practitioners of the Sun Breathing technique, who he and Kokushibo all killed years ago. Despite having slaughtered them all, Tanjiro having them is enough to make him fear for the worst.
    • This encounter is finally shown in chapter 187, and it is no wonder why Muzan became so terrified of Sun Breathing. Yoriichi Tsugikuni absolutely trivializes his abilities and cuts him apart in an instant, not even allowing him to regenerate. For all of his incredible strength, Muzan was nothing but another demon in the face of a truly exceptional swordsman.
  • One Head Taller: He is about a head taller than his wife, Rei. However, she's not even his real wife.
  • One-Man Army: After overcoming Tamayo's attempt to revert him to a human, he begins slicing his way through the Demon Slayers who had surrounded his flesh cocoon, killing dozens of them in an instant.
  • One-Winged Angel: Downplayed. He still retains his height, but in chapter 180, he essentially assumes a new and more monstrous form for himself while recovering in the cocoon. His strength, range, and speed drastically increase in this new form of his, making him the biggest threat for the Demon Slayers to face.
  • Orcus on His Throne: Despite having incredible power, Muzan would rather have his minions go out and accomplish his goals for him, preferring to hide out as one of his human aliases. This is thanks to the Noodle Incident involving Yoriichi Tsugikuni, the Sun Breathing user, who came very close to ending his life. He only takes an active role in the story during the climactic Infinity Fortress Arc. This only emphasize how much of a Dirty Coward he is.
  • Organ Dodge: Muzan can freely manipulate his many brains and hearts to move anywhere within his body, avoiding real damage if anybody happens to get past his numerous other defenses.
  • Poisonous Person: Muzan embues all of his attacks with lethal amounts of his blood, creating a poisonous effect if an opponent even suffers one scratch while fighting him. During the final battle, he overwhelms all of the present Hashira using this attribute, with them only being saved by an antidote that Tamayo had created.
  • Please Don't Leave Me: These are Muzan's Famous Last Words, pathetically begging Tanjiro not to leave him all alone in the darkness of hell.
  • Psychic Link: Any demon that receives Muzan's blood is bound by a connection to his mind, allowing him to view their memories or read their thoughts. This also allows him to enact the effects of his curse and instantly kill any underling who mentions his name.
  • Rapid Aging: As Muzan continues his fight with Tanjiro, he notices that his body is gradually becoming slower, before realizing that the drug Tamayo injected him with has a secondary effect developed by Shinobu of rapidly aging his body's cells if the drug failed to make him human. He estimates that the drug has aged him by roughly 9000 years over the course of his fight with the Demon Slayers.
  • Raven Hair, Ivory Skin: He always has perfectly groomed black hair and pale, flawless skin no matter what form he takes. He is described by the author themself in the Databook as "tall and handsome".
  • Razor Wind: One of Muzan's common attacks is to whip his Combat Tentacles and tendrils at speeds so great that they produce slicing gusts of wind. He can also spin them with enough force to create small tornadoes that can shred enemies.
  • Really 700 Years Old: He's been around for about a millennium; he became a demon in the Heian Era (late 700's), and the story takes place in the Taisho Era (the early 1900s.)
    • Taken to the next level in chapter 193 were after consuming a poison that causes him to age 50 years every minute for over three hours he has aged an additional 9000 years!
  • Red Eyes, Take Warning: He has irises and outer pupils in different shades of red. He is one of the most monstrous demons.
  • Removed Achilles' Heel: He's immune to decapitation for several reasons. One, he heals so fast his body can't recognize itself as being decapitated, and two, he has several backup brains and hearts in various parts of his body so one must simultaneously destroy all his vital points to kill him, a tall order because of his instantaneous Healing Factor. And it's possible he can outlive all that too with sheer willpower just as Kokushibo and Akaza did.
  • Rubber Man: Another one of his unnamed Blood Arts in his new demonic form is making his arms stretch to great lengths, all accompanied by sharp claws and teeth swirling around.
  • Satanic Archetype: Muzan is the originator of demons, all his forms are beautiful and powerful, and he has forms that aren't limited to one specific sex.
  • Screw This, I'm Outta Here!:
    • After experiencing first-hand how overwhelmingly powerful Yoriichi Tsugikuni's sword skills are, he splits apart and runs away in fear.
    • When it looks like he will be unable to kill the remaining Demon Slayers before sunrise, Muzan turns and runs from the battle, unwilling to take his chances.
  • Sharp-Dressed Man: He has a taste for western-style suits.
  • The Sociopath: He is perfectly capable of behaving in a civilized manner in order to blend in, but it's shown that he fundamentally lacks morals and sympathy completely. He's already like this since he's a human. He's pretty much of a bad candidate to give the elixir with.
  • Stationary Boss: Non-video game example; Muzan spends the majority of the final battle standing in one place while wildly flailing his Combat Tentacles around in a Multi-Directional Barrage. He only starts moving around as he gets more desperate.
  • Take Up My Sword: He does a rare villainous example of this trope towards the end of the manga, when he realizes that he's been defeated and he's going to die. He accept's Ubuyashiki's assertion that all things must die besides their feelings, which remain eternal, and uses every last drop of blood he has to turn Tanjiro into a demon as a way to keep his desires alive. He correctly comes to the conclusion that as Nezuko's older brother Tanjiro will also become a demon who can overcome the sun, vicariously having his ambitions fulfilled.
  • Tall, Dark, and Handsome: He is described by the author themself in the Databook as "tall and handsome", with perfectly groomed black hair.
  • Telepathy: He has the ability to hear the thoughts of any demons who have his blood in them. The closer they are, the clearer he can hear them.
  • Thanatos Gambit: Muzan pulls off a spectacularly cruel example of this trope in his final moments, using his remaining blood to revive the deceased Tanjiro as a demon in order to carry on his will to destroy the Corps. He also puts his trust in Tanjiro to accomplish his goal of becoming the ultimate demon in his stead.
  • Tornado Move: One of his attacks has him spin his whip-like appendages with enough force to create small vortexes that can suck in enemies and cut them even if the original spin of the appendage misses. He first uses this move against Mitsuri during the final battle, with her dodging the first strike but getting caught off guard and sucked in by the ensuing vortex, sustaining critical injuries. After this, he begins spamming the attack, covering the battlefield with the miniature tornadoes.
  • Tragic Stillbirth: Muzan had poor health even in his mother's womb, and was thought dead when he was born without a pulse or breathing. However, as his family was about to cremate him, he miraculously began crying for the first time and survived.
  • Tranquil Fury:
    • When Muzan is meeting with the Lower Kizuki following Rui's death, he condemns them for their weakness and question's their worth while keeping a very calm tone of voice and expression, even after Rokuro pushes one his Berserk Buttons.
    • During the final battle, he alternates between a calm, calculated wrath and Unstoppable Rage, becoming unhinged when something takes him by surprise or the battle doesn't go his way.
  • Underestimating Badassery:
    • He does not take any of the demon slayers seriously, viewing humans as well beneath any demon. He also underestimates the resolve of Ubuyashiki, as his self-destruction catches Muzan entirely off guard, giving Tamayo an opportunity to trap him.
    • Centuries ago in the past, he badly underestimated Yoriichi's abilities and nearly died for it.
    • In the final battle, he seriously underestimated the Demon Slayer corps determination to kill him and put an end to his evil for good. At first he simply delivered grievous wounds and mocked them for daring to stand up to him. But the corps and especially the Hashiras refuse to to lay down and die even when bloodied, having lost their limbs, being infected by his own blood. As the fight drags on and sunrise is coming up, his smugness turns into frustration and desperation as the Corps will do anything to prevent him from escaping from the incoming sunlight.
  • Undignified Death: Muzan dies not to the skill of a superior Demon Slayer, but to the break of dawn after turning into a literal giant baby to try to escape. And his final death is him begging for mercy as he's left to die alone.
  • Unskilled, but Strong: His fighting style in a nutshell after he emerges from his cocoon, and is forced to confront the Hashira. Compared to the likes of Kokushibo or Akaza who used highly refined sword and martial arts techniques in addition to their demonically enhanced strength and speed, most of Muzan's combat ability seems to consist of wildly flailing his tendrils at anything near him. Yet he's so strong and fast, and possesses such a strong Healing Factor, that he's at least a match for the entire Demon Slayer Corps even after being artificially aged over 9,000 years.
  • Unwitting Instigator of Doom: The doctor who made the Blue Spider Lily drug to cure him. From what we can see, the doctor was genuinely a nice person and a genius who struck gold with such potent concoction. Unfortunately, trying the medication on one as sociopathic as Muzan and succeeding caused untold amount of tragedy and death through many generations.
  • Variable-Length Chain: One of Muzan's Black Blood Techniques is called Chain of Thorns, a Blood Art that creates thorny tendrils that sprout out of his arm. Himejima easily deflects this move with his Stone Breathing skills.
  • Villain's Dying Grace: Muzan pulls off a cruel variant in his final moments. As he is dying, Muzan revives the deceased Tanjiro as a demon, doing so in the hopes that he will live on to accomplish his goal of ending the Demon Slayer Corps and become the strongest existence by conquering the sun. Muzan also chose to revive Tanjiro due to gaining his respect throughout the course of their battle, viewing him as someone worthy of becoming the perfect demon in his stead.
  • Villain Respect:
    • It turns out that Muzan developed some degree of respect for Yoriichi after their encounter, with him dismissing the abilities of the modern Demon Slayers as being nothing in comparison to Yoriichi's incredible skill.
    • He also comes to respect Tanjiro throughout their fight, viewing him as the embodiment of Ubuyashiki's final words regarding the Demon Slayers' will to stop him at all costs.
  • Villainous Breakdown: A post-mortem one. As Tanjiro begins to be cured of the demon transformation brought on by being infused with all of Muzan's blood he initially tries to quietly convince Tanjiro to stay, but as his arguments are shaken off by Tanjiro, with the assistance of the spirits of the dead pushing him up and the voices of the living, he grows more and more agitated and angry, until Tanjiro shakes him off completely and all he can do is pathetically beg him not to leave him alone in death.
  • Vocal Dissonance: He still speaks with Toshihiko Seki's masculine voice while in his female form.
  • Waistcoat of Style
  • Walking Shirtless Scene: Two times to be exact. The first time is when he loses his shirt against Ubuyashiki's explosion and the second time in his new demonic form, wearing nothing on his body and using some demonic skin as "pants" for his bottom.
  • The Worf Effect: Gets beaten up so one-sidedly and instantly by Yoriichi, to establish just how powerful Yoriichi was.
  • Worf Had the Flu: Tanjiro and the Hashira are managing to hold their own against Muzan due to a secret failsafe created by Shinobu that was in the Demon cure given to Muzan. In the event that the cure doesn't take, it instead increases the effectiveness of a secondary poison that rapidly ages Muzan. This is slowly weakening him as his body is working overtime to keep his body the same age, resulting in a very gradual loss of strength, speed and regeneration. Furthermore, a third component prevents Muzan from dividing and scattering his body to escape like he did with Yoriichi, before finally a fourth substance actives that starts destroying his cells after the first three weakened him.
  • Would Hurt a Child: He killed not only Tanjiro and Nezuko's mother but also their young siblings.
  • Wound That Will Not Heal: The numerous wounds that were inflicted on Muzan during his encounter with Yoriichi Tsugikuni still have not healed even centuries later, with the scars appearing all over his body once Tamayo's drug compromised his Healing Factor past a certain point. As such, these provide a nice weak spot for the heroes to exploit.
  • You Cannot Kill An Idea: As he is dying, Muzan recalls Kagaya's final words to him, that thoughts are indestructible and can be passed on and carried out by those who come after you. Muzan takes the words to heart after witnessing firsthand how powerful inherited thoughts and wills can be, and decides to do the same himself by passing on his desire to become the most powerful existence and destroy the Corps to the deceased Tanjiro, reviving him as a demon with his remaining blood and trusting him to accomplish his goals. Unfortunately for him, his numerous misgivings against Tanjiro and the rest make the latter less than willing to accept his cause.
  • You Have Failed Me: You either die to your enemies or die to him; there is no middle ground. Honestly, seeing the vicious ways he kills his subordinates, a swift decapitation via demon slayer would be far more merciful in comparison.
  • You Have Outlived Your Usefulness:
    • After Rui's death, he kills the remaining Lower Kizuki except for Enmu in the belief that the Twelve Kizuki only needs the Upper part.
    • He killed the doctor that made him a demon because he thought the doctor failed to cure his terminal disease — to his own detriment since only the doctor knew about the main components in the elixir.
  • You Monster!: Tanjiro calls him a true demon for deceiving his loyal followers, Susamaru and Yahaba.

Twelve Kizuki

    In General 
The Twelve Kizuki (AKA The Twelve Demon Moons) are a group of powerful demons who answer directly to Muzan Kibutsuji. They are divided in Lower and Upper Kizukinote . Each group also internally ranks the Kizuki, going from Upper One Kokushibo to Lower Six Kamanue.
  • Asskicking Equals Authority: Many of them (especially the Upper Kizuki) managed to earn their position by being powerful demons on their own right, and thus attracting Muzan's attention.
  • Authority Equals Ass Kicking: Others attained their status because Muzan directly gave them enough of his blood to become as powerful as they are, which he did because some unique detail of their human lives caught his interest.
  • Boss Bonanza: The climatic Dimensional Infinity Fortress Arc focuses on the entire Demon Slayer Corps assaulting Muzan's base of operations, which features several extremely difficult fights against the Upper Kizuki in quick succession (or simultaneously).
  • Dragon with an Agenda: Downplayed. Many of them have their own ambitions and plans, but these usually don't come into conflict with their loyalty to Muzan. Muzan generally grants them a considerable degree of independence as well and lets them do as they wish until he needs them for something in particular.
  • Evil Counterpart: They are considered to be this to the Hashira.
  • Exotic Eye Designs: All of them have their Kizuki rank on their eyeballs in the place of an iris and pupil. On top of this, they also tend to have additional unique eye features, like odd colors or strange eyelashes.
  • The Heavy: They collectively take this role as Muzan almost never makes a move on his own, limiting himself to giving orders.
  • Identity Amnesia: Most of the Kizuki don't recall their past lives as humans at all or beyond context-less glimpses. Muzan has exploited this to make them more manipulable.
  • Klingon Promotion: Muzan makes it clear that only the strong belong in this close circle. He has established a Blood Succession Battle system where a demon seeking to be ranked higher within the Twelve Kizuki can just rip their way upwards against upper ranks and take the seats if they are up to the task.
  • Marathon Boss: All of the Kizuki that the Demon Slayer Corps fight (with the exception of Kaigaku) are extremely difficult to bring down, requiring upwards of a dozen chapters just to fend off. And sometimes the Slayers aren't even able to kill them.
  • Meaningful Name: The group’s name, and its two halves, are actual phases of the moon in Japanese: Kagen and Jogen (Waning and Waxing), that’s why some translations try to find a way to localize it in a way to keep its theme.
  • More Than Mind Control: Most of them are kept in place through fear and desire to attain status, but Muzan also enjoys leading them on with empty promises to manipulate them.
  • Really 700 Years Old: Most demons are regularly culled by the Corps, but Kizuki are much stronger, so they are more likely to enjoy the immortality that comes with being a demon. While the ranks of the Lower Kizuki are shuffled around with some frequency, most of them are very old. Apart from Kaigaku, all of the Upper Kizuki are at least a hundred years old. Kokushibo deserves special mention, being that he was already Upper-1 since 400 years ago.
  • Sorting Algorithm of Evil: Their serious battles are always fought in ascending order of rank, which also signals their power. The only exception would be the first-hand experience of what an Upper Rank is like, Akaza the Upper-3 is the first Upper Rank fully introduced, he is given a fight immediately after the Lower-1 Enmu falls; however, Akaza's real fight indeed takes place in proper order, after Upper-6 through 4 are dealt with.
  • We Have Reserves: Muzan replaces the Lower Kizuki often (although he eventually gets tired of this and disbands them permanently). While the loss of an Upper Kizuki is a very significant hallmark, he isn't particularly bothered by this and has no problem making more.

Upper Kizuki

    Kokushibo 

Kokushibo

https://static.tvtropes.org/pmwiki/pub/images/kny_kokushibo_1.png
Click here to see his former human self 

Upper-1. Muzan's partner and right-hand man, he has occupied the position of Upper-1 since at least 400 years ago.


  • The Ace: The top Kizuki and the scariest, as well as the most skilled.
  • Affably Evil: Unlike Akaza who isn't above trash talking or Douma who constantly teases and mocks his opponents, he is very polite and well mannered, as well as sincere, even if he doesn't speak much. He doesn't spare compliments for his opponents either, praising their skill on several occasions. Considering he basically sacrified his own humanity to conserve and perfect his skills as a swordsman, it makes sense he values and respects dedication to the craft in others.
  • Alas, Poor Villain: As he lays dying, he realizes that he ultimately wasted his entire life pursuing an inferiority complex against his brother, even though the latter never bore any grudge against him. His last thoughts are asking why he was even born.
  • All for Nothing: Selling his humanity to become the strongest and becoming a monster? He never could surpass Yoriichi and simply becomes one of the monsters that he once hunted. He realized that all of those centuries of trying to be the undefeated swordsman led to nothing beneficial for him.
  • Always Second Best: He lived his life in the shadow of his twin Yoriichi. He was never, ever able to surpass him or learn the Sun Breathing. Ironically, even now, he's only the second strongest being, as Muzan is still over him.
  • Always Someone Better: For Kokushibo, it was his younger twin brother Yoriichi, who he could never surpass. Even as an immortal demon, and with Yoriichi an old man, Yoriichi still proved to be the superior between them.
  • Antiquated Linguistics: He was a human from at least 400 years prior to the current setting. Unsurprisingly, he speaks in extremely antiquated Japanese. How it's translated into English varies within fan translation efforts. The official Viz Media translations put a little more effort into adapting Kokushibo’s manner of speaking from time to time.
  • BFS: It turns out his regenerating katana can grow longer and sprout multiple smaller blades out of its main blade. It also counts as an Oddly Shaped Sword due to adding extra blades on its blade.
  • Big Brother Worship: Inverted. In his final moments, he remembers that all he wanted was to be like his younger twin brother, Yoriichi.
  • Body Horror: His monstrous spider-like form in chapter 176 is shown to be very disfigured. His head has all six of his eyes staring in all directions, and he grew a snout full of sharp and crooked teeth sprouting everywhere. Upon seeing his reflection on Sanemi's blade, even he is disgusted by this form.
  • Cain and Abel: Chapter 174 reveals that he is the eldest twin brother to Yoriichi Tsugikuni, the Sun Breathing user. He became jealous of Yoriichi because he had much greater natural talent and skill than he could ever compete with, even though he was taught daily in swordsmanship while Yoriichi had not trained a day. He was even astonished that his brother managed to survive with Demon Slayer Mark during their battle 400 years ago and that even at the age of 85, Yoriichi's skill and physical prowess hadn't dulled in the slightest.
  • Climax Boss: The showdown with him reveals key elements of the series lore, and it also marks the ending of of the Kizuki, who had been the most prominent antagonist up to that point. Suitably, once Kokushibo is defeaten Muzan himself takes centerstage
  • Clipped-Wing Angel: What his spider demon form turns out to be, given it took a lot of energy for Kokushibo to No-Sell his beheading and his regeneration slowed down considerably as a result. Kokushibo’s grotesque appearance also leads to the demon having a What Have I Become? moment when he sees his reflection, giving the Demon Slayers more openings to attack.
  • Clothing Damage: He loses his haori to Himejima and Sanemi's combination attack, leaving him topless.
  • The Coats Are Off: He already seemed to be too much trouble with his clothes fully on. Kokushibo was making three Hashiras (Muichiro, Himejima, and Sanemi) break a sweat against him. Then, Himejima and Sanemi manage to rip Kokushibo's haori (coat) off, and that's where Kokushibo stops playing around. Himejima and Sanemi went from trying to go on the offensive to then struggling just to not die against Kokushibo's devastating long-range attacks.
  • Co-Dragons: He and Akaza are Muzan's most reliable subordinates. As Upper-1, he's Muzan's right-hand man, and their relationship is stated to be more business-like and Akaza is Muzan's to-go man for investigation or assasination.
  • The Corrupter: Kokushibo converts Demon Slayers over to Muzan's side by overwhelming them with his power and then forcing them to drink Muzan's blood, turning them into demons themselves. He recruited Kaigaku this way and would have done the same to Muichiro if Genya and Sanemi haven't intervened. He himself was a victim of this by Muzan who preyed on his insecurities to convince him to become a demon.
  • Death Glare: He gives an epic one when he wishes to make a point. When you have six eyes, it's easy to be intimidating.
  • Despair Event Horizon: He gave in to total despair, realizing his Mark would kill him, and he'd never be able to grow beyond Yoriichi. Muzan takes full advantage of this and easily convinces him to become the demon Kokushibo.
  • The Dragon: While he may be Co-Dragons With Akaza, Kobushibo is Muzan’s right-hand man and the second strongest demon in existence.
  • Driven to Suicide: As he sees himself transformed into a hideous monster, he comes to terms with the fact that he has lived his whole life pursing the dream of being an undefeated swordsman while he blindly followed a rivalry and hatred for his twin that he didn't even truly believe in. Realizing that his whole life was basically a complete waste that he didn't enjoy he stands still as Himejina and Sanemi kill him.
  • Dying Alone: Upon death Kokushibo shamefully joins the ranks of demons who have died without anyone being there for him in the afterlife, the sign of karma for abandoning everyone that had cared for him; Kokushibo is seen being forcefully dragged into hell alone on Chapter 179's cover page.
  • Even Evil Has Loved Ones: He may be a powerful demon, but he still remembers his children very fondly and respects Muichiro as part of his family bloodline. And although he hated his brother Yoriichi, he still had a complicated sense of brotherly love for him. Addicionally, part of his hatred for Yorichii is more of a fabrication by himself, as Yorichii's own backstory directly mentions that Michikatsu was never mean or unfriendly to him.
  • Exotic Eye Designs: His rank is his central pair of eyes and all others have very prominent veins and crimson sclera.
  • Extra Eyes: He has six.
  • Eyes Do Not Belong There: He's shown to have over a dozen eyeballs on the handle of his katana. And he reveals to have even more on his katana's blade.
  • Fallen Hero: He was a Breathing user turned demon because he feared the loss of all of his techniques at age 25, due to the dangerous conditions of the Demon Slayer Mark.
  • Fights Like a Normal: Despite being a demon, Kokushibo relies more on his swordsmanship and Moon Breathing techniques, rather than using the supernatural Demon Blood Arts.
  • Fragile Speedster: Compared to the other top Upper Kizuki, Douma and Akaza, Kokushibo isn't actually that durable and his regeneration isn't as potent. However, he makes up by being stupidly fast and just landing a blow on him required Muichirou and Genya to perform what was basically a suicidal attack. In turn, he can't take damage very well and once he starts getting injured his ability to keep up his speed rapidly drops down and he gets dogpilled to death.
  • Flash Step: Fast enough to casually do this. Only Himejina and Sanemi (somewhat) can actually keep track of him, much less even attempt to attack him. He abuses this because he isn't very durable and once he is pinned down he goes down quickly.
  • The Fog of Ages: He is one of the few demons who remembers the events of his human life clearly, but has been alive for so long that he has forgotten the faces of his parents, wife, and children. The only person whose face he remembers vividly is his brother Yoriichi.
  • Green-Eyed Monster: Kokushibo's driving motivation besides his fear of losing his skill to aging and death was deep envy of his twin brother Yoriichi, particularly Yoriichi's great skill and selfless devotion to others.
  • Happily Married: As a human, he had a wife and two children who he is seen happily smiling with in a flashback, a period of his life he described as very peaceful. This was shattered the moment he reunited with Yoriichi, feeling all the hatred and resentment he had as a child come rushing back. Soon after, he abandoned his family to follow Yoriichi in search of greater strength.
  • Healing Factor: Expected from being a demon, but his demonic sword also has its own regenerating factor, being able to grow back its blade even after being broken. And this regenerating factor can make his sword grow longer and sprout multiple blades on it.
  • Heel Realization: When he looks at his own reflection in Sanemi’s sword, he realizes what a monster he's become, despite trying to retain his human appearance. He decides to die in shame of turning into such a beast.
  • Hero Killer: He takes the lives of both Muichiro and Genya.
  • I Just Want to Be Special: He reveals that his entire motivation and reason for jealousy was because he wanted to be special like his brother Yorichii was in the past. Or at least he conceptualized that on a surface level, as he actually had a complicated sense of love for Yoriichi and during most of their childhood what Michikatsu wanted was simply a brother on equal terms. Yorichii could never provide that and this emotional loneliness slowly poisoned his psyque.
  • Implausible Fencing Powers: His Blood Demon Art is not only the manipulation of his sword to grow or sprout additional blades but also to grow dozens of blades out from various points in his body, allowing him to use his Moon Breathing techniques with all his blades at once. Keep in mind, they're still in his body and poking out from spots like his thighs, his chest, his shoulders, etc.
  • Irony: For all he resented Yoriichi for having everything he wanted, it's revealed that Michikatsu had what Yoriichi wanted; a quiet, happy life with his wife and child.
    • He was never able to shed his last vestige of humanity and love for Yoriichi, even as he laid dying. In turn, Yorichii himself was able to abandon his love for Michikatsu when he finally decided to put him down for all the atrocities he commited as a demon.
  • It's All About Me: His motivation in his human days as Michikatsu was to be the best and undefeated swordsman in all of Japan. And he was willing to go great lengths in order to never to lose a battle nor his techniques, so far as to eventually becoming a demon. He also lost hope of training the disciples who could not successfully master the Breathing techniques under him and his brother Yorichii and decided to not pass down the teachings, keeping the techniques to himself. Yorichii thought differently, though; He believed that the next generation of swordsmen would one day surpass both of them in the future. Michikatsu was only thinking about himself, so of course, he could not comprehend the hope Yorichii had for the next generation.
  • Intoxication Ensues: Sanemi attempts to throw off Kokushibo's game by using his rare blood to intoxicate the air. It works since Kokushibo smelled his blood and started stuttering with his footwork, but this was only temporary, as Kokushibo eventually regains his focus.
  • Katanas Are Just Better: He's the only demon in the series who wields a katana. This is because he used to be a Breathing User.
  • Logical Weakness: He is staggeringly fast and wields a katana that can extend, which makes landing a blow on him nigh-impossible on top of forcing everyone to be permanently on the defensive, but his regeneration isn't noteworthy and he has no addicional defensive abilities. So when Genya immobilizes him with his Blood Art technique, he goes down quickly.
  • Luke, I Am Your Father: Or ancestor to be exact, towards Muichiro.
  • Lying to Protect Your Feelings: Essentially did this to himself. He's spend a good part of his life relentlessly telling himself that he hates his twin Yorichii down to his core. In truth he has a complicated sense of brotherly love for him and he greatly mournes his passing, not to mention he still keeps a memento of him well over 300 years after he died. He does this because accepting it would mean that half of his reason for becoming a demon and sacrifying everything to preserve and perfect his craft was a complete waste of time that he didn't even truly wanted to do. The moment he comes to terms with the fact that he lived out of jealously and a rivalry he didn't truly believe in he asks himself what was even his worth in life and he stands still as the demon slayers maul him to death.
  • Master Swordsman: In his fight against Muichiro, he is shown to be a very skilled and unmatched swordsman. Not only does he cut off Muichiro's hand with one slash, but he also manages to stop Muichiro's sword with just two fingers and flips his own sword against him. There's a reason why he's the top-ranked Kizuki and Muzan's most valuable ally. As a matter of fact he is the second greatest swordsman ever shown on the series, second only to his brother, Yorichii. His level of skill makes even the strongest Hashira and main characters look meek.
  • Multi-Directional Barrage: Kokushibo is capable of covering a very wide range around his body with his BFS and Moon Breathing techniques, making him nearly untouchable when he gets serious. He is able to completely overwhelm Gyomei and Sanemi this way.
  • My God, What Have I Done?: He got his head chopped off but managed to hold on and even regenerate his head back. Then he saw a reflection of himself on his enemy's blade, of how hideous a form he had taken, how low he had fallen, just to be the strongest, and started to question if this was what he wanted. And with that, his regeneration was negated by the crimson Nichirin Blades, and he crumbled.
  • Names to Run Away from Really Fast: Kokushibo derives his name from the Japanese word for The Black Death. He is one of the few demons who clearly remembers their past lives as human beings, including their previous name, Michikatsu Tsugikuni, so it seems he willingly took that name.
  • No-Nonsense Nemesis: Kokushibo does not screw around. When a fight starts and his sword is drawn, he aims to bring his opponent down and break them completely. The most he'll allow is for a defeated foe to become a demon themselves.
  • Not So Stoic: Kokushibo, when pressed, begins shedding his stoicism, letting loose ear-splitting roars of fury.
  • One-Winged Angel: His frustration at his brother's beliefs and the strength of the Demon Slayers gives him the determination to not lose, forcing himself to regenerate despite being beheaded like Akaza. However, unlike Akaza's subconscious drive to protect his loved ones, Kokushibo's determination is fueled by a combination of jealously, obsession and desire to avoid death, so this ends up being a highly unstabble, monstrous spider-like form
  • Parental Abandonment: In his past as a human, he left behind his children to join the Demon Slayers in the hope of surpassing his brother Yoriichi.
  • Power Tattoo: The markings on his face are a Demon Slayer Mark, which increases a Demon Slayer's strength, durability, and speed to legendary heights. He became a Demon in order to prevent the Mark from killing him at age 25.
  • Razor-Sharp Hand: When Muichiro impales him and refuses to let go of the blade despite being in pieces, Kokushibo severs Muichiro's remaining arm clean off with a chop from his bare hand.
  • Removed Achilles' Heel: Just like Akaza, he manages to overcome decapitation with sheer willpower. Unfortunately for him, he's too weakened from all the wounds already inflicted, and he's still vulnerable to the Crimson Nichirin blades, allowing Sanemi and Himejima to kill him by just wailing on his body until there was nothing left. He could have probably still have kept up fighting, but seeing his own hideous reflection caused him to loose his drive and he stood still, letting himself get finished off.
  • Secret Art: He doesn't use Blood Demon Arts as his primary method of fighting. He's a Breathing user; specifically, Moon Breathing. For him, his Blood Demon Arts are his Secret Art.
  • Sibling Yin-Yang: He and his twin brother Yoriichi. While he fears death because he's afraid that his sword techniques will be lost, his brother accepted this, believing that someday someone stronger than him will surface and surpass them. He is the user of Moon Breathing, while his brother is the user of Sun Breathing.
  • Simple, yet Awesome: His Blood Demon Art is the ability to forge his swords from his body, nothing too spectacular next to the other Kizuki. Yet it's effectiveness can't be denied since it means he'll never be disarmed, he can change the shape of his sword to boost his technique's power and range, and he can sprout and shoot out swords all over his body and use techniques from every one of them.
  • Sizeshifter: During his battle with the Hashiras, he slowly becomes more muscular and taller after they destroy his haori, eventually standing head and shoulders above even Himejima.
  • Start of Darkness: In chapter 177's flashback, Michikatsu reads his mother's will and after finding out that Yoriichi knew about their mother's sickness and had been helping her out rather than clinging to her side like he thought, his nose bleeds and he starts to feel jealously against Yoriichi because he gained their mother's affection and Yoriichi had always been talented since birth.
  • The Stoic: Nothing phases him at all. Not death threats from a subordinate, not Muzan contemplating exterminating the Kizuki, not a death battle.
  • Super Mode: His fear that he might actually die against the Hashira causes him to unleash his Blood Art to his full power, which sprouts copies of his sword from numerous points over his body. This allows him to use his Moon Breathing technique with each one of the swords at once, meaning that if he hadn't been restrained and weakened by Genya's Blood Art, he would have easily killed the Hashiras that were struggling to contend with him when he had just one sword.
  • Super Speed: He tends to move around using the Flash Step, and he's so fast that other Upper Kizuki and Hashira can't track his movements.
  • Sword Beam: He can create large beams from his sword when his sword enlarges. It greatly increases his range and puts Himejima and Sanemi on the defense.
  • Tragic Keepsake: As a child, he gave his younger brother a crude wooden flute that Yoriichi came to cherish as his most precious possession. After they have their final duel and Yoriichi passes on, Kokushibo finds that Yoriichi had kept the flute on his body all that time despite knowing his brother had forsaken his humanity and become a demon, something which deeply moves Kokushibo and brings him to tears. After his death at the hands of Gyomei and Sanemi, it is revealed that Kokushibo kept the flute on his body as Yoriichi had, the last remnant of his humanity that he could not let go of.
  • Undying Loyalty: Kokushibo serves Muzan as a samurai would serve his chosen lord.
  • Unreliable Narrator: To his own backstory no less. By his own admission, he hated Yorichii's guts since they were little kids. Oddly enough, all of his actions towards Yorichii when they were children are very kind and friendly, to the point Michikatsu was willing to endure beatings from their father for the chance to give toys and play with Yorichii. Further proven when Michikatsu is seen from Yorichii's perspective in his own backstory. Yorichii has nothing but kind words about Mitchikatsu. Considering Kokushibo's reaction when Yorichii passed away, it comes off more as a desperate attempt to convince himself that he had no love for his brother.
  • Used to Be a Sweet Kid: When he was Michikatsu in his youth, he wasn't really outgoing, but he was not bad either. This was due to how he was raised by his father, who was a strict man who separated the twins. One of the kind gestures that he had done as a child was given his little brother Yoriichi a small flute he made himself. Kokushibo's current feelings about this are mixed, but Yorichii's flashback proves that back then Michikatsu simply liked his brother and wanted to play and be with him.
  • Villainous Breakdown: Not as much as most other examples, but as the slayers start gaining ground on him and getting closer to victory, he starts panicking and loses his composure.
  • Villain Has a Point: For all of Yorichii's speaches about how the future generations could surpace them and that they were nothing but common men, Kokushibo's worry about the lost of skill with their deaths ended up being partially right. No swordsman ever after Yorichii has ever come remotely close to his level of skill, and Kokushibo himself remained as the greatest living swordsman, eclipsing even the likes of Himejina by a large margin; however, Yoriichi was indeed right about Sun Breathing eventually being passed down, it was the Kamado family that truly inherited its legacy and preserved it for centuries, even if no other swordsman as skilled and powerful as Yoriichi was born from it.
  • Villain Respect: After discovering that Muichiro is his direct descendant and analyzing his fighting skills, he gives him great respect and even offers him to become a demon and join Muzan's army if Muzan allows it. But he gives the greatest respect to Himejima, who he claims is the strongest Hashira he has fought in over 300 years, and attempts multiple times to persuade Himejima to become a Demon so that he can preserve his techniques since the Demon Slayer Mark will kill him by the end of the night.
  • Walking Spoiler: As can be told by all the whited-out entries, it's hard to discuss Kokushibo without delving into the deeper lore of the series or mentioning the consequences of his battle with the Demon Slayers. Even the most basic aspects of his character, such as his appearance and fighting style, can be considered hefty spoilers.
  • What Have I Become?: Seeing his spider demon form reflected in Sanemi's sword makes him realize how much of a monster he has become in trying to be as strong as his talented brother. Understanding how much shame he has lived with through his life just because he couldn't stand losing to his brother causes his regeneration to give out to the wounds of the Hashiras' new Crimson Nichirin blades, and he stands still allowing Sanemi and Himejima to smash him to bits.
  • X-Ray Vision: His six eyes allow him to see through his opponent, being able to examine their inner body structures and such.
  • You Remind Me of X: Upon encountering Muichiro, he tells him that he seems quite familiar. Muichiro is his descendant, meaning that he is his direct ancestor.

    Doma 

Doma

https://static.tvtropes.org/pmwiki/pub/images/kny_doma_color2.png
Upper-2, formerly the Upper-6 long ago.
  • Abhorrent Admirer: Despite being established as a sociopath who never cared about anyone, he actually gains a crush on Shinobu as he dies. She naturally finds this pretty revolting.
  • Adaptation Dye-Job: The few times Gotouge has shown Doma in color he was given silver hair, the Official Digital Color release, on the other hand, gives Doma light blond hair.
  • An Ice Person: Doma's blood magic takes the form of creating icy flowers and using the cold to his advantage.
  • Arch-Enemy: to Shinobu Kocho until he fell in love with her in his dying moments.
  • Berserk Button: The only thing that gets a rise out of Doma is someone mocking him for his lack of true emotions.
  • Beware the Silly Ones: Doma has an unusually cheerful personality and is prone to bouts of giddiness, being one of the only villains with several moments that are Played for Laughs, but he is the Upper-2 Kizuki for a very good reason.
  • Big Eater: A dark example. Doma loves to eat human beings, especially women and devours them in large numbers, which is why he's so powerful. Shinobu exploited this so he would eat her, consuming a huge dose of wisteria poison in her body in the process. Since wisteria is toxic to demons, it's pretty much guaranteed that eating Shinobu will kill Doma.
  • Big Ol' Eyebrows: He has distinctively thick and bushy black eyebrows, a feature he's had since he was a child. They contrast quite a bit with his feminine features and silver hair.
  • Bishōnen: He's certainly pretty and he's one of the least monstrous-looking demons in the series, but this belies the fact that he's incredibly sociopathic and cares for no one but himself. His Big Ol' Eyebrows also clash with his feminine features.
  • Black Bead Eyes: He is notably the only villain in the series that is ever shown briefly with this Art Shift feature, something usually reserved for comedic moments involving the heroes. This conveys his apparant playfulness while also highlighting his generally disturbing behavior, as everything he says and does comes off as fake despite the friendly personality he outwardly presents.
  • Brick Joke: A very dark example. At the Upper Kizuki meeting in chapter 98, Doma remarks to Gyokko that he still has the pot that he gifted to him long ago and even planted a woman's severed head in it, eliciting a confused reaction from Gyokko. Much later, during a flashback in chapter 142, Doma is shown cheerfully tending to the still flowing hair of an otherwise barren skull that is sticking out of a pot.
  • But for Me, It Was Tuesday: Initially, he can't remember fighting and killing Shinobu's sister, though her being a Hashira jogs his memory soon enough. It takes even longer for Doma to remember Inosuke's mother.
  • A Child Shall Lead Them: Being born with silver hair and rainbow colored pupils inspired Doma's parents to groom him as a cult leader from childhood. His unique hair and eye colors made others believe he was divine, which was perpetuated by Doma's parents and allowed them to spread the notion that people would lead happy resourceful lives by just worshipping Doma in their Eternal Paradise Cult. He's been at the center of the cult ever since then.
  • Combat Hand Fan: He fights with a pair of elegant and razor-sharp metal fans, using them as both melee weapons to slice apart enemies and as support items to augment his demonic ice powers by expanding his range considerably.
  • Condescending Compassion: Views his followers that he's trying to "help" as a bunch of pitiful morons.
  • Creepy Child: His thought after his mother stabbed his father to death and committed suicide herself? "Please don't dirty this room" with an annoyed expression.
  • Creepy Souvenir: Doma has a room within his headquarters that is full of the skulls of women he has killed. This is also where he keeps the pot gifted to him by Gyokko, which still contains the skull of the woman whose head he "planted".
  • Cult: Doma is a cult leader, the founder of the Eternal Paradise, which believes in 'eternal happiness.' He usually achieves this by murdering and devouring people to 'relieve their suffering.'
  • Dissonant Serenity: Doma rarely acts anything but relaxed and serene to highlight how disturbing he is. Even as a human, when his mother violently murdered his father before killing herself, his only priority was airing the room out. This is up to the point where he doesn't feel anything when dying.
  • Doppelgänger Attack: Doma can create smaller clones of himself out of ice to fight alongside him. They can use all the same abilities that the real Doma can, making it a truly overwhelming technique.
  • Establishing Character Moment: Doma is first introduced in Gyutaro's flashback carrying a woman's severed head in his arms while toting her mangled body on his back before offering to help the siblings he refers to as pathetic, establishing his sinister traits early on. Only in later chapters are his more comedic elements shown, disturbingly undercutting any humor he provides with the fact that he is an incredibly vile and callous demon.
  • Evil Is Deathly Cold: Doma's demonic powers manifest as the ability to manipulate ice, which reflects his cold and detached view of the world.
  • Exotic Eye Designs: Doma has numbered irises. Otherwise, though, he has the most normal-looking eyes of the Upper Kizuki. Oddly enough, as a human, he had rainbow-colored eyes.
  • Face of an Angel, Mind of a Demon: The prettiest of the Upper Kizuki, pleasant looking and all angelic smiles. Then he casually mentions keeping a girl's severed head in a pot for decoration and is a remorseless murderer who glories in his demon nature.
  • Faux Affably Evil: Acts bizarrely pleasant and friendly to everyone, which enrages Akaza. However, it's clear that it's simply an act, which causes him to come across as condescending and insincere, rather than friendly.
  • Flat-Earth Atheist: Despite being groomed to be a cult leader since he was born, Doma believes that there is nothing after death, and when one dies, they simply 'return to the ground,' believing religion to be a waste of time. Given he's an immortal, centuries-old demon, this is quite noticeable.
  • The Friend Nobody Likes: With possibly the exception of Gyokko, none of his peers like him, finding his fake friendly attitude irritating. A databook of the manga mentioned that even Muzan never liked him.
  • The Gadfly: Provokes Akaza with ease.
  • Hidden Depths: The Volume 19 extras revealing that Doma has also killed Kotoha’s abusive husband and her mother-in-law, but did not eat them, has a deeper meaning when Doma’s cult leader practices is brought into question; Doma, in his twisted mind, wholeheartedly believes that he is saving the people he consumes in his cult, because according to him they will live forever inside him, instead of just fading into nothingness, as Doma didn’t believe in the existence of gods nor the afterlife, with that Doma has left the husband and his mother to rot away, while he completely consumed Kotoha after she ran away from him.
  • "Instant Death" Radius: He is capable of freezing his blood and turning it to fog, chilling the air around him to a lethal degree as it can destroy a normal person's lungs in seconds or freeze their skin. This forces his opponents to fight at a distance and use hit-and-run tactics, but he can still get around this by using his fans to blow the lethal cold outwards with much greater range and precision.
  • Irony: After the wisteria poison in Shinobu's body kicks in and he's left severely weakened, one of his last-ditch efforts to repel Kanao and Inosuke is to summon a huge Bodhisattva statue. This is despite him being an atheist who doesn't believe in an afterlife.
  • Just Toying with Them: He spends almost his entire fight with Kanao and Inosuke messing around with them despite having several chances to kill them, such as when he effortlessly snatched away their sword and boar mask, respectively. This comes back to bite him hard, as doing so only wasted time and allowed Shinobu's poison to begin breaking down his body. Only then does he begin fighting seriously by summoning his powerful Boddhisattva statue, but it is too late and the two of them are able to work together and behead him as he attempts to escape.
  • Karmic Death: Dies due to the combined efforts of Shinobu, Kanao, and Inosuke, three people whose families died because of him.
  • Keet: Doma is shockingly cheerful, outgoing, and bouncy.
  • Kick the Son of a Bitch: In Volume 19 extras, it is revealed that Doma murdered Kotoha's abusive husband and mother-in-law because they were too noisy. He later abandoned their corpses somewhere in the mountain.
  • Last Ditch Move: After he begins succumbing to Shinobu's wisteria poison, Doma makes one final attempt to fight back against Kanao and Inosuke by summoning a massive Boddhisatva statue of ice.
  • Laughably Evil: Doma is the only villain with several comedic moments and is even drawn with the series' distinct Black Bead Eyes for such moments of levity. However, any of these instances are undercut by his cruel nature as a demon and his insincere personality.
  • Logical Weakness: Taking a huge dosage of wisteria poison from the inside will have heavy effects on even Upper Kizuki, as Doma discovers the hard way once the poison starts to work.
  • Magic Knight: While most Kizuki are either magically or physically oriented, Doma uses a combination of ice magic and high speed to fight.
  • Monster Misogyny: Doma prefers to eat women because, according to the Databook, they are more nutritious than men.
  • Multicolored Hair: An especially odd example; it looks like light hair with a blood-red stain on top.
  • No Sense of Personal Space: Greets Akaza with a hand on his shoulder and leaves it there until Akaza tries to punch him out.
  • O.O.C. Is Serious Business: When Kanao calls him out for his lack of true emotion, Doma drops all his smiles and gets ice cold.
  • Perpetual Smiler: It's rare Doma lacks a playful smile.
  • Pet the Dog: Doma seemed as fond of Inosuke's mother Kotoha as he could possibly be of a human being, stating he enjoyed her purity and enthusiasm, intending to keep her at his side until she died of natural causes. While he did eventually murder her when she discovered him snacking on his followers, he did try to 'explain' himself first. For someone like Doma, this is an insane level of attempted benevolence.
  • Powers Do the Fighting: He can make miniature clones out of ice that are capable of acting autonomously and using any of his offensive techniques. He creates several to fight Kanao and Inosuke while he attempts to leave in order to attend to other matters.
  • Rank Up: Doma is one of the few demons who is ever given background with the Blood Succession Battle system, he once was the Upper-6 when scouting Gyutaro approximately a century ago, later Daki and Gyutaro become the Upper-6 while Doma went on to become the Upper-2.
  • The Sociopath: Confirmed in Chapter 157. Kanao calls Doma out for all his attempts at emotion being farcical. Doma feels no emotions and can't feel them to where Kanae states she would feel sorry for him if she did not hate him so much. He's so detached that even while beheaded and dying, he doesn't really feel anything and doesn't mind
  • Tareme Eyes: They make him look more laid back than the comparatively uptight Akaza.
  • Technicolor Eyes: As a human, he was born with rainbow colored eyes. His parents saw this as a sign that he must be some kind of supernatural being, leading them to groom him as the religious leader of the Eternal Paradise Cult.
  • This Cannot Be!: After getting his head cut off by Kanao with Inosuke's help, Doma is in disbelief that he lost to Shinobu, Inosuke, and Kanao. His thoughts told him to try and regenerate just like Muzan and Akaza did, but thanks to Shinobu's poison, he realizes that his efforts to regenerate were pointless since the overdose of poison had broken down his entire body. Becomes a Graceful Loser after realizing this fact and seeing Shinobu's spirit.
  • Undignified Death: Dies while trying to flee from Inosuke and Kanao as his body is broken down by Shinobu's poison.
  • Villainous Breakdown: Averted. He certainly tries to pretend to have one, but he cannot bring himself to care. If anything, he seems disappointed that he cannot care at all about how he is dying.
  • Villainous Crush: As he's dying, Doma begins feeling a genuine emotion for the first time in his life. He then realizes that he is crushing like mad for Shinobu, even asking her spirit to come to hell with him. She, of course, rejects him with a smile on her face.
  • Villainous Friendship: Subverted. Doma treats the other Upper Kizuki like his best buddies, especially Akaza, even bursting into tears when Akaza dies. Kanao, however, notes that this is fake, and Doma is devoid of all emotion. He can't consider them his friends because he can't even feel friendship.
  • Villainous Glutton: Doma's character is defined by his gluttony towards devouring human women, messily eating countless numbers to gain greater strength while viewing them as nothing more than nutrition to fulfill his appetite.
  • Wise Beyond Their Years: Deconstructed. As a child, his parents created a religion with him as the leader because of his unique eyes and hair. Because of his disbelief in Gods, he looks down on them and his followers. He only played along out of pity.
  • You Are Already Dead: He pulls this off on the young woman that Shinobu rescues from his clutches. After Shinobu gets her a safe distance away, the woman begins bleeding before gruesomely exploding into pieces in Shinobu's arms.
  • You Killed My Father: Doma killed and ate Inosuke's mother Kotoha when Inosuke was just a baby after she found he was eating his followers.
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    Akaza 

Akaza

https://static.tvtropes.org/pmwiki/pub/images/akaza_colored_body.png
Click here to see his former human form 

Upper-3. He has been part of the Twelve Kizuki since its original formation. Presumably, he is former Upper-2.


  • Achilles' Heel: Akaza's martial arts center around reading the killing intent of his opponents. When you erase that, he's far less effective. Tanjiro makes use of this by making his fighting spirit undetectable, thus giving him the upper hand in their battle.
  • Affably Evil: He's genuinely impressed by Rengoku's strength and really does want him to agree to become a demon (and perhaps even his Friendly Enemy).
  • Alas, Poor Villain: One of the most poignant in the series, Akaza flashes back to how he lost his father, his teacher, and his love Koyuki when he was preyed upon by Muzan at his lowest. With the help of their souls, he overcomes Muzan and becomes Hakuji, weeping with guilt at having failed to protect Koyuki, who weepingly tells him "welcome home, my love," just as he forces himself to stop regenerating and disintegrates.
  • Bait-and-Switch Boss: He is the switch in to Enmu's bait, showing up at the tail ending of the Train arc just as the heroes begin to celebrate.
  • Bare-Fisted Monk: Akaza is a martial artist who attacks with strong, barehanded blows.
  • Bloodbath Villain Origin: Akaza's Start of Darkness was the murder of his fiancee and her father by a rival dojo, which led him to bloodily slaughter all 67 members with his bare hands in revenge. The reports of the event were so unbelievable that it was regarded as an exaggerated tall tale and eventually forgotten by time.
  • Broken Tears: His spirit as Hakuji breaks down in tears and asks for forgiveness from his lover Koyuki.
  • Brooding Boy, Gentle Girl: He is the Brooding Boy while his fiancee, Koyuki, is the Gentle Girl.
  • Co-Dragons: He and Kokushibo are Muzan's most reliable subordinates. Akaza is Muzan's to-go man for investigation or assasination and Kokushibo is Muzan's right-hand man with whom he has a more equals-like relationship (if still subordinate).
  • Crippling Overspecialisation: While his ability to sense the killing intent of attacks normally allows him to perfectly predict where any blow is coming from, once Tanjiro develops the ability to eliminate his own killing intent he is completely unable to react to Tanjiro's attack even after Tanjiro loudly declares that he's about to decapitate Akaza.
  • Damn You, Muscle Memory!: His Destructive Compass simply pushes his body in the direction to both defend and attack, depending on the opponents fighting style.
  • Dark and Troubled Past: He was once a young fighter named Hakuji, who stole in order to get his sick father's medicine. Then his father hanged himself while wishing for his son to live a virtuous life instead of continuing to steal for him. And then he was taken in by a kind martial artist by the name of Keizo and fell in love with Keizo's daughter, Koyuki. After a few years of happiness together, Keizo and Koyuki were murdered by a rival dojo, while Hakuji was out of town. Hakuji killed all of the members of the rival dojo, in a single night, and then encountered Muzan.
  • The Dark Side Will Make You Forget: Becoming a demon made Akaza slowly lose his memories of his humanity, his father, his beloved teacher and his fiancee Koyuki. All that remained was the savage need to get stronger and fight more. It takes Tanjiro punching him in the face after he beheads him before Akaza realizes what monster he's become and finally accepts his loss.
    "There was nothing left that I wanted to protect."
  • A Day in the Limelight: 3 entire chapters are dedicated to his backstory alone and the Upper Kizuki meeting held after Daki and Gyutarou die is largely from his point of view.
  • Death Seeker: It's implied Akaza felt this way deep down after the deaths of Keizo and Koyuki, not wanting to live in a world without the ones he loved, but becoming a demon almost made him completely forget this.
  • Despair Event Horizon: He was already beginning to reach it when his ill father hung himself over his stealing. Then the death of his goodhearted mentor Keizo, and Keizo's daughter Koyuki, Akaza's fiancee, sent him over the edge. With nothing left to protect, he succumbed to Muzan and became one of the first Kizuki.
  • Determinator: Akaza is devoted to fighting and winning. Even when decapitated, he instantly tries to seize and hold his head in place to heal, and when this fails, his body, animated by his fighting spirit, continues to fight on autopilot. But once he finally acknowledges his loss to Tanjiro, he attacks himself and wills his body to not regenerate.
  • Driven to Suicide: Akaza realizes the one he hated and wanted to kill most is himself. The one who sullied his master's beloved Soryu style by using it for murder and couldn't protect the ones he loved. After destroying his own body, with help from Koyuki's soul, he forces himself to stop regenerating and dies at peace.
  • Dying as Yourself: As he dies, 'Akaza', the demon who served Muzan is gone, and he becomes Hakuji, the boy who loved his father, master, and Koyuki once more. He goes to hell with Koyuki willingly following him.
  • Even Evil Has Loved Ones: He used to live with his father, master, and lover and cared very much for their well being in the past. He trained in his master's martial arts and made a vow to himself to protect them. And it was their spirits that brought him back to his original self.
  • Even Evil Has Standards: Doma reveals Akaza would refuse to eat or even kill women despite the former's insistence that they would have made him stronger.
  • Exotic Eye Designs: His number is carved into his irises, and his sclerae appear bloodshot or cracked. Additionally, he has an odd kind of fluffy eyelashes that surround his eyes completely.
  • Facial Markings: Stripes. They're on the rest of his body, too.
  • Fantastic Racism: Believes that humans are inferior to demons because they will grow old and die. He wants to "save" strong humans like Rengoku from this fate by offering them the opportunity to become demons. In the end, he remembers the actual weak humans he hated were those like the member of the rival dojo, who poisoned his fiance and mentor because they couldn't defeat either him or Hakuji in a fair fight, and himself, who forgot his father's last wish and sullied his beloved mentor's fighting style with blood.
  • Final Boss Preview: He broadly serves as this for the Upper Kizuki as a whole. He makes a surprise appearance at the ending of the Train arc, providing a brief, but extremely difficult fight and even claims Rengoku's life. The actual climactic showdown with him doesn't actually take place until much later, and his first apperance was basically a taste of the might of the Upper Kizuki.
  • First-Name Basis: Goes straight to using Rengoku's given name, Kyojuro, during their confrontation.
  • Foreshadowing: Many of his lines to Rengoku about his view of human weakness and his anger at Rengoku's refusal to become a demon are big hints towards his past and heartbreaking obsession to become stronger.
    • His reaction to Tanjiro calling him a coward is rather unique. He stops dead on his tracks for a second as he looks like he is about to cry. Bear in mind that he has a sword impaled in his chest and the sun is about to come out and fry him, but what gets him is getting called a coward. The most tragic event in Akaza's life was the murder of his mentor and his fiancee, which was performed by a rival dojo, which Akaza considered a bunch of coward fools, who poisoned them. His uniquely startled reaction at getting called one is a hint that there is more to the murderhappy demon we just saw, something that was helped by Tanjiro subconsciously reminding Akaza of his mentor.
  • Hate Sink: In his first appearance, he rants about how pathetic humans are and laughs in the face of Rengoku for refusing to become a demon, and to top it off he kills Rengoku, who is one of the most upbeat, kind and likable characters in the series... and then when the final confrontation with Akaza comes this gets spectacularly turned on its head by revealing his extremely tragic past, which is so heartbreaking it stands out in the middle of a group of very tragic characters.
  • Healing Factor: He shows the best one of all the Kizuki so far, with him regrowing entire limbs pretty much the same second after they are cut. Justified in that his fighting style requires for his body to be intact since he makes no use of weapons.
  • Hero Killer: Ends up killing Rengoku.
  • I'll Kill You!: Directed at Kokushibo, who just wishes him luck.
  • Instant Runes: When Akaza gets in stance to use his power, a rune in the form of a snowflake-like compass manifests below his feet, representing his ability to tell which direction that all attacks with deadly intent are coming from. The snowflake-like appearance is also a subconscious reference to his deceased fiancee Koyuki, who had snowflakes as her motif.
  • Ironic Name: Hakuji, his original name, derives from the same kanji as the komainu, statues of lion-dog guardian deities who ward off evil spirits. The tragedy of his situation is from him being unable to protect anyone he loved and becoming a demon as a consequence.
  • Irony:
    • Throughout his appearances, he's been attempting to get stronger than Kokushibo and Doma. When he finally has the opportunity to become stronger than them, he obtains his life memories and remembers he wanted to be stronger to protect the people he loved, but they are long dead. As he's embraced by the spirits of his father, teacher, and fiancee, he willingly discards the opportunity and peacefully passes away.
    • His Start of Darkness began when a dojo of samurai poisoned his mentor and fiance to death over the fact they couldn't beat him or Keizou in a straight fight to claim Keizou's dojo. What finally gets Akaza to accept his loss and pass on in peace is being punched in the face by Tanjirou, a sword wielder.
  • Knight of Cerebus: He is the first Upper Kizuki that appeared and since then more Upper Kizuki showed up, and the named Demon Slayers started dropping like flies one by one.
  • Lightning Bruiser: Even for the Upper Kizuki, Akaza is insanely fast, and his fighting style revolves around dealing out monstrous blows.
  • Mark of Shame: Those ring-like tattoos on his arms are brands to mark him for repeated theft, those stripes eventually covered his entire body as a demon, as symbolism for him becoming a bigger criminal than he could ever hope to be as a mere human being.
  • O.O.C. Is Serious Business: Albeit not quite Keet, Akaza is a fairly friendly and upbeat fellow, as much as a demon seeking to kill the main characters can be. In both of his fights, he converses casualy and remains gleeful without being bloodlusted, just enjoying the combat on itself. However, when Doma and Kokushibo are around his demeanor becomes extremely cold, prone to anger and trigger happy.
  • Removed Achilles' Heel: He survives decapitation wth sheer willpower, and continues fighting without a head.
  • The Resenter: Badly loathes Doma and Kokushibo for being stronger than him, even if he became a demon before Doma did.
  • The Rival: He considers Tanjiro to be his rival as he grew resentful towards him.
  • Roaring Rampage of Revenge: As a human when his mentor and beloved died, Akaza slaughtered the dojo who murdered them with his bare hands, only sparing a single maid who went mad. The carnage was so brutal; the written account was regarded as fictitious.
  • Shadow Archetype: Akaza is quite similar to Giyu in terms of backstory, with both being burdened by their past failures to protect people dear to them. Except Akaza is Giyu without someone like Tanjiro to snap him out of his guilt-ridden mindset, which leads him past Despair Event Horizon and into Muzan's influence.
  • Tragic Villain: Probably the worst example in the entire series, which is already full of very Tragic Villains. Like so many demons, Muzan preyed upon him at his lowest point when he was just broken. Akaza slowly forgot his love for his father, his mentor and his fiancee Koyuki until all that remained was the thrill of fighting and the hunger for strength.
  • Tsurime Eyes: Not the only character in the manga to have them, but his are especially distinct.
  • Unwitting Instigator of Doom: The unscrupulous dojo next door when Akaza was still known as Hakuji. He was so close to turn his life around, offered to be the dojo successor as well as taking his master's daughter in marriage. But their poisoning of the family just to possess their land put a kibosh on that route, Muzan offered Hakuji power, thus Akaza was born and much bloodshed and tragedy ensued.
  • Used to Be a Sweet Kid: Akaza was once a boy named Hakuji who loved his sick father, and eventually dearly loved his mentor Keizo and Keizo's daughter Koyuki. Then they were poisoned, and Hakuji succumbed to his rage and despair...which is where Muzan found him.
  • Villain Respect: Akaza has genuine respect for Rengoku's skills and wishes him to become a demon to get stronger alongside Akaza. Even when he has his fist sticking through Rengoku's chest, he's practically begging Rengoku to become a demon like him, so he won't die. He later admits he was wrong about Tanjiro being weak and offers him respect as well, saying the same to Giyu Tomioka.
  • Wake-Up Call Boss: The Kizuki to this point had been tough, but beatable and the Hashira could easily bring them down, as seen by Tomioka delivering a Curbstomp Battle to Rui. But Akaza is a monster and even if Rengoku is able to do impressively well, he has no true chance in a straight fight, his death demonstrating exactly how the Upper Kizuki are no joke.
  • Walking Shirtless Scene: Akaza tends to wear very little on his upper body.
  • Walking Spoiler: More so than all the others Kizuki, as evidenced by how censored his entry is here. It is very difficult to talk about him at all, as the context of his very first appearance is a spoiler on itself, and one of the first things he does is killing Rengoku. On top of this, the details of his character and motivations are themselves enormous spoilers.
  • Worthy Opponent:
    • He considers Kyojuro Rengoku to be this, wanting him to become a demon to preserve his amazing skill and so they can fight forever.
    • After meeting again, he believes Tanjiro is a worthy adversary, as well. He also extends this to Giyu, inviting him to become a demon during their battle.
  • Wouldn't Hit a Girl: According to Doma, Akaza would not eat or kill women, something he found strange. It's implied to be because of his fiance.
  • Wound Licking: Gloats over his closing wounds by licking them.
  • Yank the Dog's Chain: The reason for his Tragic Villain status. Born in poverty, he's been committing crimes to take care of his ailing father, until he committed suicide to spare his son from a criminal lifestyle. Akaza almost had a happy ending when a dojo master took him in, and offered to make him successor as well as take his daughter's hand in marriage. Unfortunately, the unscrupulous dojo next door used poison to murder the family while Akaza was away, and things went downhill from there.
  • You Gotta Have Blue Hair: His hair is bright pink.

    Hantengu 

Hantengu

https://static.tvtropes.org/pmwiki/pub/images/66e1d89c70fd60da527fd3630d37e2c7e10ecb8fr1_255_281v2_00.jpg
Click here to see Hatred 
Upper-4.
  • 13 Is Unlucky: Believes that the fact that it has been 113 years since the last time all of the Upper Kizuki were called to meet with Muzan is a bad omen.
  • Affably Evil: His Joy form is very cheerful in battle and even compliments his opponents when they get a hit on him, much to the ire of Anger and Sorrow who both take fighting very seriously.
  • All Your Powers Combined: Hatred is capable of using all the abilities of his weaker emotions, as it is created by absorbing them all, usually channeling the powers through the wooden dragons it forms. It can be seen using Anger's lightning attacks, Joy's gusts of wind, Pleasure's sonic scream and Sorrow's piercing blows of air.
  • Animal Motifs: Genya refers to his Fear form's minuscule body as like that of a rat's, which is a very apt description of Hantengu. He has large pointed ears, is seen moving around on all fours at times, and cowers at anything he perceives as a threat before running away. The source of his power is even an embodiment of the old Japanese proverb "the cornered rat will bite a cat."
  • Arc Villain: Of the Swordsmith Village Arc, along with Gyokko, due to assaulting the village in order to cripple the Demon Hunters.
  • An Arm and a Leg: Genya rips off the two arms of his Resentment form.
  • Asteroids Monster: Killing his emotion self just makes it split into two different emotions, and splitting them again just creates two more each, and so, each one turning more and weaker. That is unless they start cannibalizing each other.
  • Attack on the Heart: How he meets his end. As the sun begins to rise, Hantengu attempts to escape by shrinking his true body and hiding within the heart of his large Resentment emotion as it runs for cover. Tanjiro catches up to him thanks to Nezuko's Heroic Sacrifice and cuts the Resentment body in half, perfectly bisecting the heart and decapitating Hantengu's true body in one slash.
  • Big Ol' Eyebrows: Hatred has noticeably thick and bushy eyebrows that clash with his otherwise child-like appearance, a trait that none of the other emotions share.
  • Bishounen Line: Compared to his old and ugly normal form, his emotions take the shape of handsome, youthful men.
  • Blade on a Stick: His Sorrow form wields a jumonji yari, a type of traditional Japanese polearm.
  • Blood Knight: His Joy and Pleasure forms have shades of this, as they both take a lot of, well, joy and pleasure from the thrill of combat.
  • Blow You Away: His Joy emotion has a yatsude leaf fan that can generate powerful gusts of wind.
  • Breath Weapon: All of the attacks used by Hatred's wooden dragons are shot from their mouths.
  • Cannibalism Superpower: By having an emotion eat the other, they turn into a different, stronger emotion. Notable in that the emotions being devoured don't react nicely to the process.
  • Climax Boss: He's the last opponent faced before Nezuko becomes invulnerable to the sun, and after the Hashira Training Arc, Muzan comes down on them, Kagaya sacrifices himself, and the Dimensional Infinity Fortress Arc then happens.
  • Combat Pragmatist: His various forms have no qualms about attacking someone in the back while they are distracted fighting another emotion, something that Genya and Nezuko find out the hard way.
  • Combo Platter Powers: Hantengu's emotions have a very wide variety of supernatural abilities that don't really follow a specific elemental theme, much more than any other demon in the series. It's implied that Hantengu himself could use every single one of his emotions' powers, but doesn't because he is too much of a coward.
  • Cornered Rattlesnake: This is a distict aspect of Hantengu's power and what makes him such a formidable opponent. His normal form usually cowers in fear, and when put in a corner his emotions become so strong they split off to protect him. The worse a situation is for him, the stronger the emotions become, which allowed him to overpower all of his prior enemies.
  • Crater Power: Joy's blasts of wind are so powerful that they create yatsude leaf-shaped craters in the ground.
  • Creepy Child: Mitsuri finds his Hatred emotion to be very unnerving, being in the form of a boy who displays plenty of Troubling Unchildlike Behavior.
  • Crouching Moron, Hidden Badass: With his unimpressive aspect and cowardly personality, is easy to dismiss Hantengu as a fool and a weakling, but the true is that his Demon Blood Art is incredibly troublesome, and to fight him on equal conditions it was necessary the combined efforts of two skilled demon hunters, a Hashira and a powerful demon. His Hatred form is so strong that, had not been for the intervention of Mitsuri to distract him in enough time, Tanjirou and Genya wouldn't have defeated him.
  • Death from Above: Hatred manipulates his wooden dragons to move high above the ground, allowing him to rain down his various Combo Platter Powers on foes.
  • Death Glare: His Hatred form gives off an intense glare upon his enemies that can freeze weaker-minded people in fear.
  • Dirty Coward: Spends most of his fights whining and crying in terror while his 'emotions' do the fighting. His normal body runs away from combat and hides, becoming an embodiment of Fear that is protected from danger by his other emotion forms. In the end, he even dies like a coward, getting cut down while running away as the sun rises.
  • Distinguishing Mark: His various bodies have the kanji for their namesake emotion marked on their tongues, something that Tanjiro realizes and uses to locate Hantengu's real form.
  • Drums of War: Hatred has a ring of taiko drums on his back that he rhythmically strikes to manipulate his wooden dragons and attack.
  • The Eeyore: His Sorrow form, naturally, is very sullen and moody at all times.
  • Emotional Powers: The emotions that Hantengu feels are a main component of his fighting style, as they split off into physical embodiments of a said emotion when he is in danger. The stronger the emotion that he feels, the stronger the physical emotion becomes.
  • Evil Laugh: Some of his forms let out "Kakaka" as their Signature Laugh.
  • Evil Old Folks: Not that the young-looking Upper Kizuki are any younger, but he is the only one who takes the shape of a shriveled old man.. When he splits into his separate emotions, they appear much younger than his standard form, with the strongest being a child.
  • Facial Horror: Hantengu's normal form has a nasty-looking tumor on his forehead, which really adds to his overall gruesome appearance. This feature is a reference to a traditional Tengu legend called "The Old Man's Lump Removed".
  • Four Is Death: The fourth strongest member of the Upper Kizuki can split into four main bodies, and is also a very superstitious person.
  • Four-Temperament Ensemble: After Hantengu is cut down two times, he divides between anger, joy, pleasure, and sorrow.
  • Green Thumb: His Hatred emotion can manipulate trees, often forming them into the shape of a dragon.
  • Hair-Trigger Temper: It doesn't take much to set off his Anger form.
  • Harping on About Harpies: Male example; his Pleasure emotion, while predominantly based on a tengu, also greatly resembles a harpy, with wings sprouting from his back and bird talons for hands and feet.
  • Horned Humanoid: Hantengu has two large horns protruding from his head, a feature that all of his forms share.
  • Hypocrite: Calls human monsters for attacking him, never mind that he attacked first and that he has eaten countless humans. This attitude greatly enrages the usually kind and sympathetic Tanjiro, to where he's more than happy to behead him.
  • Instant Awesome: Just Add Dragons!: You know Hatred means business when he starts turning the surrounding forest into giant wooden dragons. Overlaps with Dragons are Demonic.
  • Kids Are Cruel: His most powerful emotion, Hate, is in the form of a child.
  • Last Ditch Move: This is what his Resentment emotion amounts to, being a large body summoned as a last resort to protect his pathetic and cowardly normal form.
  • The Leader: Anger seems to serve as the leader of the four main emotions, as it orders around the others and admonishes Joy for not taking the fight seriously. It is also the emotion that absorbs the others to form Hatred, the strongest form.
  • Literal Split Personality: Splits into multiple versions of himself when cut, each having a different attitude. His main four emotions are Anger, Joy, Sorrow, and Pleasure, but also has forms for Fear, Hatred and Resentment.
  • Made of Iron: His normal form becomes incredibly durable when it shrinks down to a minuscule size and becomes Fear, taking sword blows to the neck and blasts from Genya's nichirin shotgun pellets without sustaining damage. He is only damaged by Tanjiro using Hinokami Kagura techniques.
  • Magic Staff: His Anger emotion uses a ringed shakujō staff, capable of sending shockwaves of stunning electricity.
  • Make Me Wanna Shout: His Pleasure emotion can emit a sonic screech capable of stunning enemies. Hatred is also capable of using this ability to much more devastating effect, as it is capable of tearing grown men apart.
  • Meaningful Name: His name can be translated as "half tengu", with many of his emotion forms having elements from traditional Buddhist depictions of tengu as harbingers of war, embodying the most terrifying parts of the legends and none of the positive. The "han" part of his name also evokes the hannya mask, which his normal face greatly resembles.
  • Miniature Senior Citizens: A really small, disturbingly creepy old man. While using his powers, he becomes as small as a rat, while his emotion selves become fairly big.
  • Moral Myopia: He winges and cries about being 'bullied' when he's attacked. Never mind that Hantengu, as a human being, was a recognized thief and killer, and has also eaten hundreds of people as a demon.
  • Musical Assassin: Hatred attacks by striking the taiko drums on his back with a fast rhythm, similar to the Drum Demon Kyogai.
  • Nervous Wreck: Hantengu is always in a state of anxiety, even when not in combat.
  • Never My Fault: Pretty much his personality and the source of his power. As a human, he used to kill and steal yet preached his own innocence, claiming his hands were acting on his own. This dissociative disorder is what apparently turned his blood art into the emotions tengu generating thing it is. The magistrate in his flashbacks and Tanjiro have no absolutely no sympathy for him in the slightest.
  • Obfuscating Disability: As a human, Hantengu was a thief and a murderer who pretended to be blind to take advantage of others and avoid suspicion.
  • Oh, Crap!: His standard form has this reaction to nearly everything, pathetically shrieking in terror and cowering at anything perceived as a threat.
  • Perpetual Frowner: Anger and Sorrow are always shown with a serious scowl or frown. The same can be applied to Hatred (who himself is an stronger form of Anger).
  • Perpetual Smiler: Joy and Pleasure are almost always seen with wicked grins plastered on their faces, while Anger and Sadness are only seen either scowling or frowning. The contrast between the expressions of Joy and Anger's faces is shown in shadow on the cover page of chapter 107.
  • Pointy Ears: He has a pair of large pointed ears, another feature shared by all of his forms besides the set of horns.
  • Powers Do the Fighting: The real Hantengu just runs away and cowers in fear during the battles. His emotions, however...
  • Power Gives You Wings: His Pleasure emotion has wings and makes full use of them in combat.
  • The Power of Hate: His strongest emotion is Hatred, which takes the form of a child version of himself.
  • Razor Wind: Sorrow can thrust it's polearm with enough force to send piercing blows of compressed air.
  • Running on All Fours: Hantengu has a habit of moving around on his hands and knees when in his standard form, and can move surprisingly fast in the position. He makes his introduction to Tanjiro and Muichiro by crawling into the house they are in, and proceeds to dart all around the room while still on all fours before getting cut down by Muichiro and splitting apart.
  • Sexier Alter Ego: Hantengu's youthful emotions are much better looking than his decrepit normal form, to put it mildly.
  • Shock and Awe: Anger can send shocks of lightning through the floor, stunning and incapacitating foes.
  • Sizeshifter: His body can shrink down to a very small size when it becomes Fear, and grows to a rather massive size when it becomes Resentment.
  • Small Role, Big Impact: His battle in the swordsmith village leads to Nezuko gaining resistance to the sun. Muzan, finding out about Nezuko's new ability, compliments Hantengu as a result despite losing the battle. Thus, leading to the Dimensional Infinity Fortress battle where he infiltrates the Demon Slayers headquarters in search of Nezuko to absorb her as part of his plan.
  • Stealth Expert: He introduces himself into the fight by casually opening the door and crawling in the same room Tanjiro and Muichiro are in, neither of them had noticed his presence until right then. This level of skill is what makes them instantly realize they are against an Upper Kizuki. This aspect of his character is based on the traditional story of the Tengu's Magic Cloak, in which a tengu possesses a straw cloak that can hide the wearer's presence.
  • Straight Man and Wise Guy: Anger and Joy have this dynamic after splitting off at the start of the fight, with Anger taking everything very seriously while Joy takes the battle lightly and snarks at him for his bad attitude.
  • Tears of Fear: He constantly sheds tears when he is cowering. His normal body even becomes the Fear form when the other emotions split off.
  • Teeth-Clenched Teamwork: Despite splitting off from the same individual, Hantengu's emotions don't get along very well and bicker amongst themselves often.
  • Telescoping Staff: Sorrow wields a polearm that can extend and retract in length.
  • Tengu: His main motif; his various forms have elements from traditional legends associated with tengu. Examples include his standard form's lumped forehead, Pleasure's bird-like appearance, Joy's yatsude leaf fan, and Anger's yamabushi-style clothing and shakujō staff.
  • Thunder Drum: His Hatred emotion has a ring of taiko drums on his back, resembling the thunder god Raijin. He even has an attack that rains down lightning strikes with every strike of the drums.
  • Tranquil Fury: His strongest form, Hatred, is seething with rage but usually keeps a calm expression. He only gets really worked up when condemning others for their treatment of his real form.
  • Undignified Death: Hantengu is cut down in the back while he is pathetically running away from his opponents as the sun begins to rise.
  • Walking Shirtless Scene: His Joy and Pleasure forms have little or nothing covering their upper bodies.

    Gyokko 

Gyokko

https://static.tvtropes.org/pmwiki/pub/images/gyokko.png
Upper-5.
  • Arc Villain: Of the Swordsmith Village Arc, along with Hantengu, due to assaulting the village in order to cripple the Demon Hunters.
  • Art Attacker: Gyokko's main weapons are ornate pots that he uses for a variety of both offensive and defensive purposes, including summoning sea creatures to attack or protecting himself from harm by teleporting between them.
  • Attention Whore: Clearly the case. More than the people who try to murder him, its the blacksmith not paying any attention to him what makes him angry, and he is later baffled at how Muichiro doesn't seem impressed towards him.
  • Berserk Button: Having his pots insulted puts him into a frenzy, to the point that his blood vessels burst.
  • Bloody Hilarious: The scene where Gyokko reveals his "art" to Muichiro and the swordsmiths is so over-the-top that it almost seems like something out of a Black Comedy. Gyokko is at his absolute hammiest while describing, in excruciating detail, what the various aspects of his mangled corpse sculpture represent while Kanamori and Kotetsu invoke He Had a Name for each poor soul that is part of the abomination. The ludicrous scene is shut down by a Precision F-Strike from Muichiro, leading to their battle.
  • Body Horror: He is the most grotesque looking demon in the entire Twelve Kizuki, being just a ghostly white upper torso without normal arms, only several disturbing baby-sized arms sprouting from his back. His head has two mouths where his eyes should be, and an eye where his mouth should be with an additional eyeball on his forehead.
  • Confusion Fu: One of his primary tactics is to teleport between his pots in an instant to disorient his opponents, leaving them confused before attacking with his sea creatures.
  • Combat Tentacles: He can summon octopus tentacles from his pots to battle.
  • Curb-Stomp Battle:
    • His first fight with Muichiro is over in an instant, as Gyokko is able to trap him within a water prison immediately before leaving him to drown.
    • Their second fight is an entirely different story. Muichiro returns after escaping and awakening his Demon Slayer mark, making quick work of Gyokko despite his One-Winged Angel transformation.
  • Evil Is Hammy: Gyokko is quite possibly the hammiest villain in the series, befitting his status as a Mad Artist.
  • Evil Laugh: "Hyohyohyo".
  • Exotic Eye Designs: In addition to being in the wrong place, his eyes have his number carved into the irises.
  • Eyes Do Not Belong There: He has mouths where his eyes should be and an eye where his mouth should be and another on his forehead.
  • The Fighting Narcissist: Very much. He is constantly praising himself during fights, and it's more concerned about his enemies appreciating his "beauty" and skills than on killing them.
  • Fog Feet: He has no visible legs or feet, only having his upper body appear out of his pots like a djinn.
  • Good Old Fisticuffs: After going One-Winged Angel, he forgoes the use of his pots and attacks with his scale-reinforced fists instead.
  • Gratuitous French: The name that Gyokko gives to his corpse sculpture is "L'Agonies des Forgerons", meaning "The Death of Swordsmiths".
  • Hammerspace Hideaway: His pots are relatively small but can fit things much larger than them inside, including Gyokko's body, the corpses of several grown men, building-sized fish, giant octopus or thousands of demon piranha.
  • Hit-and-Run Tactics: While in his standard form, Gyokko likes attacking from one position before swiftly retreating within his pots and reappearing somewhere else to attack from another angle.
  • Honor Before Reason: His obsession over his art being appreciated leads him to not just kill his opponents when he could easily do so, and Muichiro's lack of reaction to him causes Gyokko to become enraged, leading to him vastly underestimating Muichiro's awakened state.
  • Improbable Weapon User: Gyokko's main fighting style is centered around the use of pottery, and it doesn't make him any less deadly.
  • Kick the Dog: Gyokko kills several swordsmiths and turns their mangled corpses into a horrifying sculpture, something that he is quite proud of. The gruesome display deeply angers Muichiro and leads to their fight.
  • Lightning Bruiser: After transforming, his fighting style incorporates the use of blinding speed to strike his opponents with diamond-hard fists, as opposed to using his pots and sea creatures to attack.
  • Losing Your Head: During the Upper Kizuki meeting following the deaths of Gyutaro and Daki, Gyokko speaks out of turn and interrupts Muzan while he is busy talking and swiftly gets his head torn off for it. Muzan holds Gyokko's head in his hand while reminding him of his place, before releasing it and allowing him to regenerate, a treatment that Gyokko considers to be a great honor. The Databook reveals that Muzan considers Gyokko to be his favorite subordinate, explaining how he could get away with such egregious behavior that would lead to any other minion getting butchered.
  • Mad Artist: Slaughters multiple innocents and fuses their bodies into twisted sculptures for 'art.'
  • Making a Splash: His Demon Blood Art allows him to control water and water-related creatures.
  • Meaningful Name: His name means "jade vase".
  • Mook Maker: Gyokko can create a variety of man-eating fish monsters from his pots that he sends out to act on their own, using them to terrorize the Swordsmith Village while he confronts Muichiro. They range in size from miniscule fish demons to giant, building-sized monstrosities.
  • Multiarmed And Dangerous: Sort of. While he has several arms, both on his torso and face, they are all baby-sized at best. He manifests his pots from the arms and can use up to ten of them simultaneously, one for each hand.
  • Mundane Utility: Along with the magical, blood-infused pots that he normally produces, Gyokko can create pots the traditional way that are actually considered to be very well-crafted and beautiful within human society, selling for extravagant prices.
  • One-Winged Angel: Can shed his skin and turn into a bigger, sea-serpent like version of himself, which he says no one has survived against. Muichiro is unimpressed, however.
  • Piranha Problem: One of his techniques allows him to summon thousands of demon piranhas, each secreting poison liquid, from his pots. This attack requires him to use all ten of his arms with a pot in each hand.
  • Satellite Character: Gyokko receives the least characterization out of all the original Upper Kizuki, with his personality revolving entirely around his narcissism and dedication to Muzan. His partner during the Swordsmith Village arc, Hantengu, receives similarly little, but at least his backstory is shown in flashback so we have an idea of what his deal is.
  • Scaled Up: He transforms into a snake-like being when fighting seriously and covers his upper body in scales that he claims to be hard as diamonds.
  • Sculpted Physique: His ultimate form has an incredibly muscular upper body, a body he claims to have perfected by strengthening it to the hardness of diamonds.
  • Snake People: His One-Winged Angel form has a serpentine lower body, resembling the mythical Naga.
  • Summon Magic: His Blood Art allows him to summon sea creatures, like piranhas or octopus, from his pots to help him fight. After transforming, he is able to summon demon fish with nothing but his punches.
  • Teleport Spam: He has the ability to teleport his body between any of his specially-made pots in an instant, a skill he makes liberal use of in combat.
  • Too Many Mouths: He has two mouths where his eyes should be. One mouth says positive things, while the other speaks negatively.
  • Underestimating Badassery: He does not respect the skills of Muichiro, and pays for it by suffering the most humiliating defeat of all the Upper Kizuki.
  • Undignified Death: After transforming into his One-Winged Angel form, claiming himself to be unbeatable, he is beheaded by an awakened Muichiro without much effort. All of the original Upper Kizuki take incredible amounts of effort by multiple heroes to bring down, but he is easily defeated by a single opponent. He spends his final moments ranting before unceremoniously getting his head sliced in two. He is also the only Upper Kizuki with the distinction of getting no flashback or scene in the afterlife upon his death.
  • Verbal Tic: Often peppers his speech with the word "hyo", which also serves as his Signature Laugh.
  • Villainous Breakdown: Really loses it once he loses against Muichiro, ranting about how he is a supreme being, a chosen one, and how he doesn't deserve to lose.
  • Villainous Friendship: Gyokko seems to be the only demon among the Upper Kizuki who genuinely views Doma as a friend, as the other members can see through Doma's friendly behavior and treat him with either contempt or indifference. The two have visited eachother several times in the past, with Gyokko even gifting Doma one of his prized pots.
  • Why Don't You Just Shoot Him?: Gyokko succeeds in capturing Muichiro in a vulnerable state where he cannot escape...but he ends up just leaving him alone to investigate Haganezuka refining the sword instead of finishing him off.
  • You Fight Like a Cow: Engages in a war of Volleying Insults with Muichiro after they both begin fighting seriously. It doesn't work out too well for him.

    Daki 

Daki

https://static.tvtropes.org/pmwiki/pub/images/kny_daki.jpg
Click here to see her stronger half 

Upper-6.


  • Alas, Poor Villain: Gyutaro's death is curiously somber, reflecting upon how he wanted to protect his baby sister, his painful life and accepting hell for his sins. Daki, who became a demon at age thirteen and being far more innocent of their sins, refuses to leave him alone, rejecting heaven itself to follow him into hell. Even Tanjiro feels a measure of sympathy for them, even covering Gyutaro's mouth to stop him from insulting his younger sister further, and begging them to get along and make up even on their final days.
  • Animal Motifs: Gyutaro is compared several times to a praying mantis, with his emaciated figure and sickles resembling the body of the insect.
  • Arc Villain: Of the Red Light District Arc, for being an Upper Kizuki and the one responsible for the disappearances of its women and Sound Hashira Uzui's wives.
  • Berserk Button: Being attractive, well off, having wives...anything that sets off Gyutaro's inferiority complex is liable to guarantee you some pain.
  • Beauty Is Bad: Daki relishes in both her status as the most beautiful oiran in the district and her nature as a demon. Muzan even states that her beauty is only matched by her cruelty.
  • Big Brother Instinct: Though they argue, Gyutaro wants to protect his little sister.
  • Bitch in Sheep's Clothing: While in her human guise as Warabihime, Daki likes to put on a polite Yamato Nadeshiko act to get what she wants, but those who work closely with her are aware of her cruel and petty nature.
  • Bloody Murder: Gyutaro can weaponize his blood, using it to create slicing blades or vortexes capable of shredding his opponents.
  • Bond Villain Stupidity: After seemingly succeeded in defeating the Demon Slayers, instead of quickly finishing them off, Gyutaro give Tanjiro "The Reason You Suck" Speech and offer him a chance to become a demon, giving Tanjiro and others enough time to recover and defeat him and Daki.
  • Brainless Beauty: Gyutaro considers Daki to be rather unintelligent, as she uses her beauty to get what she wants and acts on impulse without rationally thinking her actions through.
  • Brother–Sister Team: Both Daki and her older brother Gyutaro have the position of Upper-6.
  • Clothing Appendage: Daki's body seems to be made of prehensile fabric.
  • Clothing Combat: Daki is surrounded by many sashes made of her flesh that she can manipulate to attack or bind foes, with each having the strength of steel. The sashes have additional properties, including the ability to absorb humans into them, which is how she kidnaps her victims, or splitting off parts that can act on their own and spy for her.
  • Children Are Innocent: After their defeat, it's strongly hinted that if she had chosen not to join her brother, Daki would have been allowed to go to heaven. It also helped that she is one of the few demons not to have chosen to become one, having been near death at thirteen when Gyutaro made the decision for both of them.
  • Dark Action Girl: Daki is cruel, vicious and is able to give Demon hunters a hard time. She's not as good of a fighter as her brother, however.
  • Designated Girl Fight: Daki is the first demon that Nezuko truly has a one-on-one fight against, and it is an incredibly brutal fight at that.
  • Dual Wielding: Gyutaro wields a pair of sickles made from his own flesh that are coated in poison. It is revealed in his flashback that he was proficient with the weapons since a young age.
  • Even Evil Has Loved Ones: They love one another dearly, even if they viciously bicker and insult one another. When the chips are down, all they have is one another.
  • Facial Markings: Daki has a flower-like pattern on her cheek. Gyutaro has mottled patterns on his face and other body parts, though it is more likely that those are birthmarks since he had them as a human too.
  • Foil: Daki and her brother is this to Tanjiro and Nezuko. They are both pairs of siblings fighting and caring deeply for each other. But while Tanjro and Nezuko, at least back when she was human, can live independent from each other and think about other people, Daki and Gyutaro only care about each other. In a more detailed contrast, Tanjirou is a caring, gentle, and honest young man with a good looking face while Gyutaro is an ugly, violent loan shark who hurt people. Meanwhile, Nezuko used to be, and somewhat still is, a nice and mature girl while Daki is a selfish womanchild who only thinks about herself and her brother. Finally, in extreme situations, Tanjirou would (reluctantly) abandon Nezuko to fulfill his duty as a demon hunter while Gyutaro will only have his sister as his sole priority.
  • Green-Eyed Monster:
    • Daki kidnaps and devours any women who she feels are a threat to her status as the most beautiful oiran in the Yoshiwara Red Light District.
    • Due to his poor upbringing, Gyutaro is very envious of those he perceives as being more privileged than him. After meeting Tengen, he sarcastically compliments him on his good looks, large physique and popularity with women before declaring that he will give him a tortuous death for being born with everything that he never had as a human.
  • Heel Realization: In his final moments before death, Gyutaro finally remembers their past back when they were living a terrible childhood in a Red Light District, in the poorest area, under a prostitute mother who abused he and his sister to no end. He realizes that once their mother died, he and his sister Ume/Daki should have struggled more just to run away from all of that life; what Gyutaro did instead was basically become a pimp to his own sister and teach her that she shouldn't take crap from anybody. This indirectly pushed her to stab in the eye a samurai who wanted to have his way with her against her will, causing Daki to be burnt alive as retaliation. Gyutaro, in his desperation, to save her, accepting the offer to become demons. Now at the brink of their death, Gyutaro wished he taught his sister better instead of letting her be a prostitute when she could have better things in life.
  • High-Class Call Girl: Daki's human alter ego, Warabihime, is an oiran, a type of Japanese courtesan.
  • Homing Projectile: One of Gyutaro's techniques allows him to manifest his blood as sickle blades that move independently and can track an enemy's movements.
  • Hypocrite: After getting beheaded and calling upon her older brother to help, Daki whines to Gyutaro that the Demon Slayers had been bullying her. This coming from the woman who had mercilessly bullied those she viewed as beneath her, along with kidnapping and devouring any women who she felt could challenge her beauty.
  • Immortal Immaturity: Daki is incredibly immature despite being well over a hundred years old which makes sense as she was turned into a demon at age 13.
  • Kick the Dog: One of Daki's establishing moments has her drop a hostess named Mitsu to her death for an incredibly petty reason, cruelly taunting and insulting the poor woman before killing her.
  • Kill It with Fire: Daki was burned alive by her john after poking his eye out and likely would have died had she not been turned into a demon.
  • The Load: A villainous example. It's revealed by Muzan that he considered Gyutaro the real Upper-6, who would have easily won against the Demon Slayers had he just fought alone from the beginning. Muzan perceives Gyutaro making Daki his partner out of brotherly love as a weakness and the last remaining fragment of his humanity. This is even visually conveyed in the series itself, as Gyutaro is shown several times literally carrying Daki on his back, including when they enter hell together.
  • Losing Your Head: Daki is beheaded but to the surprise of everyone around, she doesn't die. That's because Daki cannot die unless both she and her brother are beheaded together.
  • Meaningful Name:
    • Daki means "fallen princess" and sounds remarkably close to Dakki, the Japanese name for the Chinese courtesan monster Daji.
    • Gyutaro's name comes from a word meaning prostitutes' manager.
  • Moral Myopia: Gyutaro freely admits he cares nothing for other people's little sisters, even if he cares for his own.
  • Ms. Fanservice: Daki is the most gratuitous example of this in the series, thanks to her skimpy outfit. Countless panels with her feature examples of Absolute Cleavage, Bare Your Midriff, Male Gaze and She's Got Legs. This also lends itself to plenty of Fan Disservice, as she suffers several gruesome injuries, such as having half her face melted off, yet still has a lot of focus drawn towards her body.
  • Multicolored Hair: Gyutaro has black hair with green ends.
  • No-Holds-Barred Beatdown: Daki suffers an absolutely brutal beatdown from Nezuko once she gives in to her demonic nature. Daki goes from effortlessly dealing with Nezuko to getting literally stomped and set on fire, with all of her attacks having no real effect.
  • Prehensile Hair: Daki can manipulate her hair to attack or bind enemies, though this is much weaker than her sashes.
  • People Puppets: Gyutaro can fully coordinate Daki's body so her movements can become even more deadly than when she is acting independently. In the end, Daki even tries to excuse herself not doing better against the slayers because her brother just didn't control her body well enough..
  • Phantom Zone Picture: The people captured within Daki's sashes are visible from the outside, appearing as patterns on the sides.
  • Poisoned Weapons: Gyutaro's sickles are coated in a deadly poison, allowing him to ensure death against most opponents with a single landed attack.
  • Power Dyes Your Hair: Bleaches it white, in Daki's case. Turns out it was her original hair color, though.
  • Power Floats: Daki is shown suspended high in the air as she taunts the hostess Mitsu before dropping her to her death, but she never displays this ability again after this scene.
  • Psychopathic Man Child: Womanchild, but Daki is extremely immature and childish which makes sense as she was turned into a demon at age 13.
  • Rapunzel Hair: Daki's hair reaches past her knees.
  • "The Reason You Suck" Speech: Gyutaro gives a brutal one to Tanjiro, explaining how his weakness prevents him from protecting what is precious to him. This speech in particular comes from the heart, as he sees Tanjiro's struggle to protect Nezuko as a reflection of his own failure to protect his younger sister Daki when they were both human.
  • Shameless Fanservice Girl: Daki greatly enjoys flaunting her body while in her true demon form with her Stripperific outfit, and has a habit of perching herself with her legs spread wide in a very crude and unladylike manner, giving anyone in view an explicit look at her crotch.
  • The Smurfette Principle: The only female Kizuki so far but shares her position with her brother Gyutaro, who is the far more dangerous and skilled of the two.
  • Sore Loser: After getting beheaded by Tengen, Daki throws a huge tantrum which leaves the Hashira in disbelief, ultimately calling on her brother to emerge and kill the people that had hurt her.
  • Stripperiffic: Daki's demonic outfit is equal parts lingerie and kimono.
  • Stronger Than They Look: Gyutaro had a very scrawny body when he was human yet he apparently was very strong, he himself seems surprised by the fact, once Gyutaro became proficient with a sickle he played with by himself he could easily overpower men bigger than him to collect debts; as a demon Gyutaro got big muscular arms but his torso remained extremely thin.
  • Tainted Veins: When things get serious.
  • Taking You with Me: After getting beheaded by Tanjiro, Gyutaro's headless body unleashes several large vortexes of blood in a final attempt to kill him and Tengen. They miss their targets but still destroy all the surrounding buildings.
  • Third Eye: Gyutaro is capable of manifestisng one of his eyes on Daki's forehead. Gyutaro can see through the eye, giving him greatly enhanced perception and allowing the siblings to coordinate their attacks to devastating effect.
  • Together in Death: Upon dying, they enter hell together. But not before arguing about it first.
  • Tragic Monster: A 13-year-girl who was burned alive for resisting an attempted rapist. Her big brother Gyutaro made the choice to accept Doma's offer to turn both into demons to save her.
  • Two Beings, One Body: Gyutaro spends his time inside Daki's body until she calls for his help. Neither of them can be killed unless both have been beheaded.
  • Walking Spoiler: It’s hard to talk about Daki without mentioning her brother Gyutaro.
  • You Are Worth Hell: Daki follows Gyutaro to hell despite him telling her that she should go towards the light. She doesn't care and states that she will always be his little sister no matter how many times they are reborn.

    Nakime 

Nakime

https://static.tvtropes.org/pmwiki/pub/images/kny_nakime.jpg

The new Upper-4. She controls the Dimensional Infinity Fortress, a dimensional fortress that Muzan and his demon army reside in.


  • Aloof Dark-Haired Girl: She's pale, has dark hair and possesses a cold and quiet behaviour, barely showing any emotion.
  • Blinding Bangs: She has bangs long enough to cover her one eye.
  • Cyclops: She is a demon that only has one eye on her head.
  • Dark Action Girl: While not as combat-oriented as Daki and possesses a support-based ability, she still can hold her own in a fight thanks to being able to manipulate the Dimensional Infinity Fortress at her will.
  • Didn't See That Coming: Yushiro manages to sneak up behind her to blind her with his Blood Art, causing her to misinform Muzan of Mitsuri and Iguro's presence. She also loses control of the fortress by Yushiro.
  • Eerie Pale-Skinned Brunette: She's a one-eyed demon with black hair and pure white skin.
  • Emotionless Girl: Nakime is calm and quiet, not flinching even once when fighting against Mitsuri and Iguro.
  • Mook Maker: She can create miniature eyeballs to scout and spy around an area. This is how Muzan was able to find the headquarters of the Demon Slayers in search of Nezuko, who can walk in the sun currently.
  • Musical Assassin: She wields a biwa to manipulate and shift the environment of the Dimensional Infinity Fortress to her advantage, similar to how Kyogai could manipulate his house domain through small drums. However, she is even more powerful as she is able to create objects such as doors and windows out of thin air to defend herself and can create large protruding pillars for offense, all with the stroke of her biwa.
  • Not-So-Harmless Villain: She may not look like she can do much on her own and seems to be more of a supporting member in Muzan's army, but keep in mind that when entering into the Dimensional Infinity Fortress, she has full control of its entire environment. That means that she can simply stroke her biwa to open up a dimensional portal to keep her opponents away from her. Iguro comments on how irritating their battle will be. And keep in mind that her scouting ability is what led to the Dimensional Infinity Fortress fight while looking for Nezuko's location.
  • Portal Door: With her demon powers having full control of the Dimensional Infinity Fortress, she is able to create portals through dimensional windows. When Mitsuri attempts to cut Nakime, she just opens a dimensional window at the end of Mitsuri's jump to teleport her off of her platform. Mitsuri falls down in a comical manner before managing to grasp onto a ledge. Nakime then uses another dimensional window to teleport Iguro off of her platform.
  • The Quiet One: Nakime doesn't say much.
  • Satellite Character: Although she had a few moments of expression, she is overall just another pawn of Muzan and her character is never explored.
  • The Smurfette Principle: Played With. While Daki was also an Upper Kizuki, by the time Nakime becomes the new Upper Moon Four, she's long time dead, making Nakime the only female Upper Kizuki at the time of her ascension. Also, if you count Gyutaro as the true Upper Moon Six, then she's the only female member of the Upper Kizuki shown in the whole manga.
  • Space Master: Her Demon Blood Art allows her to have full spacial control of the Dimensional Infinity Fortress by playing her biwa. Not only can she teleport her targets anywhere she pleases within the fortress and create Portal Doors as listed above, she can also weaponize the fortress by manipulating its many structures and surfaces to slam into her enemies. For even more disorientation, Nakime can shift the fortress' environment to create illogical perspectives, like the Relativity painting created by M. C. Escher.
  • The Spymaster: After the loss of half the Upper Kizuki, she serves as Muzan's primary source of intelligence gathering, using countless eyeballs formed from her body to discreetly monitor the Demon Slayers. She is able to discover the long hidden Ubuyashiki estate this way.
  • The Stoic: She rarely shows emotion and nothing seems to faze her. Not when Muzan reprimands his subordinates, not when he's punishing them, not when facing two Hashiras, not while being controlled by Yushiro, and not even at her own death.
  • Terse Talker: She rarely speaks, but when she does it is in a very blunt and straightforward manner, only conveying the necessary information in as few words as possible. In a rare instance for the villains, this is Played for Laughs when she curtly shuts down Doma's attempt to flirt with her.
  • Weak, but Skilled: Nakime's Blood Demon Art isn't lethal or deadly by any means, but her mastery of it allows her to play keep-away by manipulating the Infinity Fortress to warp or smack around her opponents and keep her out of their reach.
  • We Hardly Knew Ye: Despite being one of Muzan's closest subordinates and showing up before any of the original Upper Kizuki, she is unceremoniously killed by Muzan once she becomes a liability due to Yushiro's interference. She is given no backstory or even any real personality by the time she dies, being a simple tool of Muzan's.
  • You Have Outlived Your Usefulness: For the majority of the series she was one of Muzan's most valuable followers thanks to her demonic abilities, but the moment she is compromised by Yushiro's control, Muzan disposes of her so that her power can't be used against him.
  • Your Head A-Splode: Muzan telekinetically crushes her skull once she is put under Yushiro's control, preventing him from manipulating her powers for the Demon Slayers' benefit.
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    Kaigaku 

Kaigaku

Voiced by: Yoshimasa Hosoya (Japanese), Alejandro Saab (English)

https://static.tvtropes.org/pmwiki/pub/images/kaigaku.jpg
The new Upper-6, a former rival of Zenitsu's.
  • A Pupil of Mine Until He Turned to Evil: A former student of Zenitsu's mentor, who joined Muzan out of a hunger for power and a fear of death.
  • Berserk Button: Reminding him that he never learned the First Form the Thunder Breathing Style. It especially stings when it's coming from Zenitsu who never mastered anything beyond that.
  • Big Brother Bully: Zenitsu viewed Kaigaku as a big brother figure and always looked up to him, but Kaigaku clearly didn't act the part towards Zenitsu, always insulting him and never understanding all the good Zenitsu was doing for him.
  • Broken Pedestal: Zenitsu used to deeply admire Kaigaku's talents despite his nasty behavior and even developed his own Thunder Breathing form to one day fight at his side as an equal, but that is shattered once he becomes a demon and drives their master to suicide. Kaigaku's petty insults towards their master's death only cement Zenitsu's hatred for his former rival.
  • The Bully: An unpleasant, mocking, secretly insecure jerk who pushes around weaker people, especially Zenitsu, just because he can.
  • Death by Irony: Kaigaku was a pupil of Thunder Breathing that could use all but the first form (the basis of them all), resulting in his techniques being weaker by consequence. The invented Seventh Form by Zenitsu, who could only use the first form, is a faster and more powerful version of the first form and successfully beheads him.
  • Didn't See That Coming: He had no idea Zenitsu created a Seventh Form to the Thunder Breathing...specifically to one day fight at Kaigaku's side as an equal.
  • Dirty Coward: He chose to become a demon to avoid death. He also was the child who sold out Himejima and his wards by letting the demons come inside their house after being outed for stealing their funds, leading to all but one dying and Himejima being arrested and almost executed; again, to save his own cowardly ass.
  • Early-Bird Cameo: He briefly appears in Zenitsu's flashback in the anime.
  • Evil Cannot Comprehend Good: He only cared about himself and never understood any acts of goodness towards him, such as Zenitsu trying to defend his honor by punching a trainee who was talking behind his back, instead of criticizing Zenitsu for hitting some higher-ups. And even when he and Zenitsu would get into arguments, Zenitsu would try to get along with him anyway. Kaigaku just shrugs it off. And finally, he did not understand that his master wanted both him and Zenitsu to share the position of Hashira to fight as brothers-in-arms. Kaigaku only wanted the position to himself.
  • Evil Feels Good: He clearly takes pleasure in becoming a demon.
  • Evil Orphan: He's the same kid who told a demon to attack the temple where he and other orphans were taken care of by Himejima and put out demon repellent there in exchange for his life. Volume 17 confirmed it was after Kaigaku was outed by the other kids when they found out he had been stealing from their money savings.
  • Fatal Flaw: Selfishness. In the end, Kaigaku is driven by his own self-interest and preservation, including why he became a demon. Yushiro's speech to him remarks how his inability to care for others ultimately left him with nothing as he dies being beheaded by Zenitsu's invented Seventh Form Thunder Breathing technique originally intended for fighting by his side.
  • Foil: To Zenitsu. While Zenitsu is a selfless Lovable Coward and a clever fighter who is more limited by his lack of confidence rather than any lack of talent, Kaigaku is a mean-spirited brute driven to mock and belittle others by an overwhelming fear of death.
  • Hate Sink: Think that, like the other Demons in the series, he's going to have a backstory that'll shed some light on his prior actions? Nope. In the end, all Kaigaku is a spiteful, unpleasant bully and a Dirty Coward who'd sell everyone out to save his own skin.
  • Hypocrite: He mocks Zenitsu's weakness and him being a coward while he became a demon partly to save himself from dying. If anything, he's more cowardly than Zenitsu.
  • It's All About Me: Kaigaku measures everything with how it corresponds to him, stating clearly that what's good for him is good and what isn't is evil. He couldn't comprehend why their mentor wanted him to share the successor position with Zenitsu wanting the position for himself.
  • Jerkass: Not just an evil demon. Kaigaku is also a total asshole.
  • Jerk with a Heart of Jerk: Might be that he has a sympathetic reason for being a demon? Nope, Kaigaku is just a nasty prick that only cares about himself.
  • Join or Die: After encountering Kokushibo, Kaigaku surrenders immediately and is essentially given the choice of either joining Muzan's ranks or suffering a swift decapitation.
  • Karmic Death: For all his mockery of Zenitsu's weakness, it turns out Kaigaku is unaware of the seventh Thunder Breathing form that Zenitsu invented and is easily dispatched by it.
  • Kick the Dog: Mocking his master, Jigoro, and his death in front of Zenitsu can apply to this, pissing the demon slayer off.
  • Lack of Empathy: Instead of feeling saddened over his and Zenitsu's master's seppuku because of the betrayal that he caused, he insults their master and gloats about himself. This angers Zenitsu very much.
  • Lightning Bruiser: As befitting a Thunder Breathing user, Kaigaku's style is all about moving incredibly fast with powerful strikes. But since he couldn't obtain the first form, which is the foundation for all, his other forms are weaker than they should be.
  • Psycho Electro: He specialises in Thunder Breathing techniques, and is a very petty and psychotic individual. Unlike other users of Thunder Breathing in the series, he seems to generate actual lightning when using his techniques, thanks to imbuing his attacks with demonic blood magic.
  • Rival Turned Evil: Once Zenitsu's rival in the Thunder Breathing succession, Kaigaku became a man-eating demon for power and for his own survival.
  • Shadow Archetype: To Zenitsu. Kaigaku embodies pre-Character Development Zenitsu without any of his redeeming traits, prioritizing his own self-preservation above anything and everything else.
  • Shock and Awe: Becoming a demon allowed Kaigaku to imbue his Breathing techniques with blood demon magic, causing him to generate black lightning that can burn and crack the flesh of anyone who touches it. This makes him one of the only swordsmen in the series to actually generate the element associated with his Breathing style as opposed to the metaphorical depictions shown by other characters.
  • Small Name, Big Ego: Of all the Upper Kizuki, Kaigaku goes down the quickest and easiest. It's more or less strongly implied he only got the position because Muzan had already lost three top Kizuki and needed to fill the spots quickly with the most impressive of the lower ranks (which Zenitsu bluntly points out). In any case, Kaigaku is far less impressive than he would want to boast.
  • Speak Ill of the Dead: Kaigaku doesn't mince his words when voicing his displeasure with how he and Zenitsu's master treated them as equals, and continues to spit petty insults towards the man even after learning of his death.
  • This Cannot Be!: He's shocked and horrified Zenitsu manages to outmaneuver and behead him.
  • We Hardly Knew Ye: While he made appearances in Zenitsu's flashbacks, his debut in the main story as a servant of Muzan sees him lasting just a few chapters before Zenitsu kills him. Given how much it takes to kill the other members, this underscores just how pathetic he really was.
  • With Great Power Comes Great Insanity: Kaigaku was an unpleasant jerk as a human, but becoming a demon just made him into an absolute psychotic asshole.

Lower Kizuki

    Enmu 

Enmu

Voiced By: Daisuke Hirakawa (Japanese), Landon McDonald (English)

https://static.tvtropes.org/pmwiki/pub/images/kny_enmu.jpg
The Lower-1 and a member of the Twelve Kizuki.
  • Bait-and-Switch Boss: Albeit a very tough opponent on his own, he's the bait for the immensely more dangerous Akaza.
  • Body Horror: After merging with the Infinity Train, Enmu's body becomes something truly horrific, bordering on Eldritch Abomination. His humanoid form becomes a proxy that can survive decapitation by sprouting a grotesque mass of flesh to connect his head to the train, which looks like something out of The Thing. Masses of flesh with arms and eyeballs also begin forming within the train which attempt to consume passengers and a very large spinal column forms underneath the train's engine. Once he is defeated, the true extent of his assimilation is shown, with the fleshy masses completely surrounding several cars at the front of the train.
  • Compelling Voice: One of his abilities allows him to grow a mouth on his hand which can speak and instantly put to sleep anyone who hears its voice.
  • Crazy-Prepared: Enmu is very aware of his Blood Demon Art's limitations and weaknesses, and takes many precautions to ensure the Demon Slayers on the train fall under his technique without revealing or endangering himself. Too bad he had no way to account for Nezuko's presence or Tanjiro's Heroic Willpower.
  • Dream Weaver: Has control over what the people he puts to sleep dream about, saying he likes to vary it between sweet dreams and horrible nightmares.
  • Eerie Pale-Skinned Brunette: He has black hair and pure white skin. He's introduced as a Nightmare Fetishist who Loves the Sound of Screaming as Muzan brutally kills the other Lower Kizuki.
  • Empty Shell: Victims of his who have their spiritual cores destroyed from within their subconscious are turned comatose, making them very easy to consume afterward.
  • Evil Gloating: Upon merging with the train, Enmu drops his polite facade and begins taunting Tanjiro, confident in his victory. This leads to...
  • Explaining Your Power to the Enemy: After meeting Tanjiro and having a short fight, he explains his ability to merge with the Infinity Train and his plan to devour all passengers aboard, fully believing that he has already won at that point. This, of course, backfires as it gives Tanjiro the clue he needs to locate Enmu's weak spot and leads to his death.
  • Eyes Do Not Belong There: After merging his body with the train, he can grow countless eyeballs from anywhere within that can put to sleep anyone who looks into them.
  • Face Death with Dignity: While the other Lower Kizuki react with terror in the face of Muzan's purge and attempt to flee or bargain for their lives, Enmu is in ecstasy at the thought of being personally killed by Muzan and offers his life with no hesitation or fear. Averted with his actual death, where he spends his final moments cursing Tanjiro and his group while lamenting his weakness despite being given a second chance and power-boost by Muzan.
  • Faux Affably Evil: He is very well-mannered for a demon and speaks to his human subordinates with a kind and gentle tone. He also politely greets Tanjiro when they meet and continues to be cordial even as they fight. In truth, he has no respect for human life whatsoever, and only acts affable in order to manipulate the humans around him.
  • Forced Sleep: He has several techniques that let him put people to sleep.
  • Journey to the Center of the Mind: His Blood Demon Art allows him to enter his target's subconscious and destroy their spiritual core, which would leave them comatose. However, there are many risks to doing this, so he'd rather use human pawns to do it instead. He provides them with a special rope infused with his blood that allows them to enter the dreams of whoever it's tethered to, but doesn't bother fully explaining the risks involved
  • Losing Your Head: Tanjiro is able to swiftly decapitate Enmu after learning how to counter his sleep powers, but by that point, he had already fused with the train and his head continues to taunt Tanjiro before melting away into the train car's roof.
  • Loves the Sound of Screaming: He greatly enjoys hearing the screams of his fellow Lower Kizuki being disposed of by Muzan.
  • Manipulative Bastard: Enmu convinces several weak-minded and emotionally vulnerable people to do his dirty work by promising them unending pleasant dreams, but he has no regard for human life and fully intends to devour them afterward regardless.
  • Meaningful Name: Enmu is a man-eating demon with powers over sleep and dreams. His name, written with kanji meaning "nightmare dream", is an anagram of nemu, the Japanese root word for "to sleep", which can be a euphemism meaning "to die".
  • Multicolored Hair: He has black hair with red and blue ends.
  • Near-Villain Victory: He comes very close to accomplishing his mission of killing Tanjiro and Rengoku, at one point having both helplessly trapped within his Blood Demon Art without either even realizing that they were under attack thanks to his meticulous planning. The only reason he fails is due to Nezuko being unaffected by his technique, allowing her to briefly wake Tanjiro which gives him the chance to figure out how to counter Enmu's powers.
  • Nightmare Fetishist: Enmu enjoys the suffering of others. A lot. Especially when Muzan is the one who is carrying it out.
  • Soft-Spoken Sadist: He speaks in a soft and calm tone, but he is clearly psychotic.
  • Sentient Vehicle: Enmu merges his body with the Infinity Train.
  • Sole Survivor: He is the only survivor of Muzan's purge of the Lower Kizuki.
  • Sycophantic Servant: He's the only Lower Kizuki who didn't think of running away and who wasn't afraid of being killed by Muzan until he decides to give him a second chance to redeem himself by killing Tanjiro.
  • This Cannot Be!: After having his spinal column severed by Tanjiro, Enmu is in utter disbelief at what happened. He had all the present Demon Slayers, including a Hashira, under his technique and at his mercy, but still ultimately failed without even killing a single human aboard the train.
  • Too Clever by Half: Enmu is a very intelligent foe and is driven by his desire to rise up the ranks of the Upper Kizuki to prove his worth to Muzan. However, his intelligence and conviction lead to arrogance, gloating to Tanjiro once he merges with the train and inadvertently giving Tanjiro the clue he needs to locate his weak point.
  • Undying Loyalty: The other Lower Kizuki tried to flee or bargain for their lives, but Enmu simply offered his life and endless praise for Muzan. Muzan instead gives him a painful Deadly Upgrade and spares his life.

    Rui 

Rui

Voiced By: Kouki Uchiyama (Japanese), Billy Kametz (English)

https://static.tvtropes.org/pmwiki/pub/images/rui_7.jpg
The Lower-5 and a member of the Twelve Kizuki.
  • Arc Villain: Of the Mount Natagumo arc, being the leader of the Spider family and the strongest demon Tanjiro and his friends fight in that arc.
  • Animal Motif: Spiders. His hair is shaped like one; he uses threads as his main weapon (reminiscent of a spiderweb) and has three pupils in each eye, similar to how spiders possess multiple eyes. This later carries over to his "family", as each member has traits of a spider after Rui modified them to make them more similar to him.
  • Anime Hair: Rui’s hair is styled to look like a spider’s legs wrapping around his face.
  • Berserk Button: He tortures his family whenever they revert to their original demon forms.
    • Tanjiro royally pissed him off when he called his family bonds “fake”, and Rui went out of his way to make him suffer for it rather than just kill him immediately.
  • Curb-Stomp Battle: Toys with Tanjiro for a while before defeating him with ease. Tanjiro manages to recover and fight back seriously, but Rui still gets the upper hand thanks to quick thinking... And a second later Giyu shows up and delivers this himself, one-shotting Rui with a single clean move so fast that he didn't even notice.
  • The Dark Side Will Make You Forget: He felt so empty after killing his parents, that as he went about making another family for himself, with time he wound up forgetting his real parents, only remembering them as he dies.
  • Deliberate Injury Gambit: Severs his own head with his threads just as Tanjiro's about to decapitate him, saving his own life.
  • Domestic Abuse: He abused his fake family when they didn't follow the roles they are given by him.
  • Evil Cannot Comprehend Good: He directs his "family" like a Prima Donna Director directs a theater play, and is completely incapable of understanding just why Tanjiro and Nezuko, being siblings, stick their necks out for each other.
  • I Just Want to Be Loved: He created a false family with other demons because of his lingering emptiness from killing his real parents.
  • Ill Boy: Rui in life was this, which was why he became a demon. His mother even apologized to Rui with her dying breath for not giving him a healthy body.
  • Made of Iron: His skin is even tougher than his threads, the same ones that broke Tanjiro’s Nichiren Sword.
  • My God, What Have I Done?: His reaction after killing his parents, and after reuniting with them after his own death.
  • Offing the Offspring: Rui's father did this upon discovering Rui became a demon, because they couldn't live with their son's crimes, but did so with the intention of dying with him.
  • Razor Floss: His web threads are extremely sharp, capable of easily slicing apart human flesh and bone, and even snapping Tanjiro's Nichirin Sword.
  • Self-Made Orphan: Rui's father tried to kill him after Rui started eating humans. In response, he killed his parents. He only remembers as he's on the verge of death that his father had said they'd all die together.
  • Slasher Smile: Though he is usually stoic and expressionless, he shows a nasty grin when he reveals to Tanjiro his rank as Lower-5.
  • Spiders Are Scary: Rui and his whole 'family'.
  • The Stoic: He only shows any expression regarding the idea of family.
  • Together in Death: Rui reunites with his real parents in death.
  • Villainous Breakdown: He narrowly manages to avoid Tanjiro's killing blow, but by his own admission, Rui had never been angrier before in his life.
  • Vocal Dissonance: He has a deep voice for a child demon.
  • White Hair, Black Heart: White hair, and a toxic, twisted idea of family values.
  • Wake-Up Call Boss: While other demons weren’t exactly easy for Tanjiro to deal with, Rui is the first demon he outright loses against. By the moment he snapped Tanjiro’s sword in half, it was clear that this wasn’t an even battle. He even managed to avoid a last-ditch move that would have killed him without quick thinking. Tanjiro would have been killed on the spot had Giyu not arrived.
  • The Worf Effect: Puts Tanjiro through the wringer and came close to killing him. Then Giyu shows up and one-shots him.
  • Would Hurt a Child: In the anime, Rui is willing to abuse his "mother", who is actually a child demon after she accidentally reverts back to her original form seen in the "older sister"'s flashback.

    Other Lower Kizuki Members 

Voiced By: Taiten Kusunoki (Rokuro / LM2), Soichiro Hoshi (Wakuraba / LM3), Kana Ueda (Mukago / LM4), KENN (Kamanue / LM6) (Japanese), Ray Chase (Rokuro / LM2), Stefan Martello (Wakuraba / LM3), Kira Buckland (Mukago / LM4) Alan Lee (Kamanue / LM6) (English)

https://static.tvtropes.org/pmwiki/pub/images/kny_lower_moons_4.jpg
From up to down: Rokuro (LM2), Wakuraba (LM3), Mukago (LM4) and Kamanue (LM6)
Muzan Kibutsuji's six less powerful minions. Unlike the Upper Kizuki, they have been killed and replaced many times.
  • All There in the Manual: In the first fanbook, it was revealed their names were Rokuro (Lower-2), Wakuraba (Lower-3), Mukago (Lower-4), and Kamanue (Lower-6).
  • Dirty Coward: According to Muzan, Mukago is afraid to fight the Demon Slayer Corps, and she has no intention to fight the Hashira.
  • Eaten Alive: Both Kamanue and Mukago were eaten alive by Muzan.
  • Exotic Eye Designs: The Lower Kizuki have one eye with their number engraved into it. In addition, Rui and Enmu's other eyes are also unusual; Rui's eyes have three pupils, and Enmu has a horizontal rectangular pupil.
  • Facial Markings: Like most demons.
  • Morton's Fork: After criticizing their strength and questioning their worth as subordinates, Muzan gives them a chance to speak for themselves, which amounts to either agreeing or disagreeing with his assessment. Wakuraba realizes that Muzan will kill them no matter what answer they give, as he has no use for weaklings and hates those who speak against him, and decides to Take a Third Option by attempting to flee.
  • Nothing Is Scarier: While the other members' fates are shown in brutal detail, Rokuro's death is offscreen and only a pool of blood is shown afterward. Given that he was the Lower Kizuki who had angered Muzan the most, it must not have been a pretty sight.
  • Oh, Crap!: Kamanue's reaction when he realizes that Muzan can hear the thoughts of demons.
  • Screw This, I'm Outta Here!:
    • Mukago is thinking about running away from the dimension fortress after Muzan decides to kill the remaining Lower Kizuki, but is eaten by him.
    • Wakuraba attempts to flee from the dimension fortress, but Muzan quickly decapitated him.
  • The Smurfette Principle: Mukago is the only female of the Lower Kizuki.
  • Tears of Fear: Kamanue and Mukago, moments before Muzan eats them both.
  • We Hardly Knew Ye: Muzan decides he doesn't need them. They aren't even named in the story and we never find out what each of their Blood Arts were.
  • You Have Outlived Your Usefulness: Muzan decides that the Lower Kizuki are too weak to be worth the effort of keeping them around, and kills all of them except Enmu.

Other

    Kyogai 

Kyogai

Voiced By: Junichi Suwabe (JP), Steve Blum (EN)

https://static.tvtropes.org/pmwiki/pub/images/kyogai.png
Former Lower-6.
  • Abusive Parents: His father constantly belittled his work and cruelly denied him the approval he so desperately craved. Unsurprisingly, while his role in Kyogai's Start of Darkness was tragic, he was an Asshole Victim in the whole sordid affair.
  • Arc Villain: Of the Drumhouse arc. Though there are two other demons in the house that competed with him, they are easily killed by Inosuke and Zenitsu, so he ends becoming the main threat of the arc at the end.
  • Body Horror: As a demon, he has several drums sticking out on his shoulders, stomach, and legs.
  • Domain Holder: While not omnipotent within the Drum House, he is quite difficult to kill due to being capable of changing the orientation of the rooms at will and relocating people from one area to another (though he lost the latter power when another demon clawed out his back drum in a skirmish over food).
  • Drums of War: Kyogai can attack others with invisible clawing attacks within his domain by pounding on the drums embedded in his chest and shoulders. By pounding the drum on his back, he can forcibly transport someone to another room in his building. The drums on his shoulders and legs will change the orientation of the room via rotation.
  • Eye Scream: Muzan removed his number due to Kyogai having reached his limits to eating humans.
  • Last Request: All he wanted was someone to recognize his works. He finally gets this validation through Tanjiro's telling him that his techniques were strong after he decapitated him.
  • Musical Assassin: Uses taiko drums to manipulate reality in his house or to send out a disembodied strike in the shape of giant claws.
  • Perpetual Frowner: Through the arc, he is constantly shown as angry and frustrated due not being able to find Kiyoshi, and he's always frowning. He stops doing that after Tanjiro kills him and recognizes his strength.
  • Self-Made Orphan: His extreme negative emotions over his father's emotional and verbal abuse led to him becoming a demon, and his first drum was the one on his torso that creates an invisible slashing attack. Do the math.
  • Tears of Joy: He cries silent tears as he dies, as his talents were finally recognized by someone at the end of his life. This allows him to die peacefully.
  • Teleporters and Transporters: The drum that was originally on his back, has the ability to transport other people in random locations inside the drum house.
  • "Well Done, Son!" Guy: Was an aspiring writer and musician as a human, but his own father, whose approval he sought, constantly mocked and belittled his abilities.
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