Muzan Kibutsuji

Muzan's menacing and cold-blooded disposition. Muzan is a cold-hearted, ruthless, intimidating, cruel, and exceptionally intelligent megalomaniac. He sees no value in any humans he has encountered and shows little value in his own subordinates. Rarely ever visibly upset or happy, he appears completely monotone and detached on most occasions, even when he callously murders his own subordinates. The only times he ever shows emotion are when his vision of perfection is moving forward or when he has subordinates completely submit to his will. Initially, his expressions would only change slightly and only bear a slight shift from his usual calm attitude and his tone of voice tends to be consistent at nearly all times, accentuating his monotonous demeanor. His cruel and imposing nature has gained him the great admiration and fear of many demons. Muzan's sadistic and arrogant attitude. After Hantengu informs him of Nezuko Kamado's survival of sunlight, Muzan reveals a side that is in stark contrast to his perpetual composed disposition, as he is shown to be ecstatic at the prospect of absorbing her to finally gain the immunity to sunlight himself. In addition, he also shows himself to be extremely arrogant and prideful, first seen when he mockingly asked a platoon of soldiers sent to kill him if they were referring to him. His arrogant side is also shown when he gloats to Kagaya Ubuyashiki about never facing any divine retribution from the gods or the Buddha for his millennia of murders, convinced that the gods have let him off the hook for his crimes. Furthermore, he is shown to also have an incredibly sadistic attitude, first shown when he reminds Tamayo of how she murdered and ate her family following her transformation, visibly smiling cruelly as she wells up with tears and further reminding her that she killed more people as well. In addition, when Muzan has Nakime summon the Demon Slayer Corps inside the Infinity Castle, he brags to Tanjiro that he will murder the entirety of its members that night, and when he responds with a vow to hunt him down, Muzan boldly dares the Demon Slayer to follow up on his threat if he can. It is apparent that after his encounter with Yoriichi Tsugikuni, Muzan's more vicious and overconfident personality was stifled by the sheer terror brought upon by the Demon Slayer that nearly killed him, only resurfacing after learning of Nezuko's ability and realizing a new chance to complete his ultimate goal is now in his grasp. His inflated ego and delusional sense of self-worth are so large, he cannot stand being mocked or corrected in any fashion, believing that others only exist to serve him. This also means he rarely ever takes any opponent or threat seriously. He brutally killed a drunk man simply for being rude to him, killed the man's brother for trying to punch him, and their female companion who had done nothing, all while proclaiming his own perfection and superiority over them, displaying his shrewd pettiness as he won't settle for any mockery and will do anything he pleases until the humiliation is remedied. This event also hints that Muzan has unpleasant memories of his weaker, human past, and is very self-conscious of his unnaturally sickly appearance, immediately following his own rhetorical questioning with a lengthy denial that he is unhealthy, sick and much less on the verge of death, in all likelihood a bitter reminder that he is still imperfect. When he confronts Kagaya Ubuyashiki, the man responded to Muzan in a tone of pity and sadness for the life he had led. However, Muzan only interpreted his words as insults and threats, which further accentuates his hatred for humanity and the Demon Slayers. He also believes that Heaven has let him off the hook for murdering thousands as he has never seen a god or Buddha. left|thumb|Muzan ruthlessly punishing Akaza for his failure. The most prominent trait Muzan possesses is extreme narcissism, pettiness, and an obsession with becoming the perfect being. As he has had over a thousand years to live and observe, along with hardly any real challenges, his extreme egocentrism is almost expected. He considers almost nothing to be his concern except overcoming his inability to walk in the sun, which is his primary drive. His long life and obsessions have caused him to want every plan he concocts to be absolutely perfect, and his superiority complex prevents him from seeing his own failures. His belief that he is the closest thing to a perfect being causes him to have zero tolerance for any failure, brutally punishing those who fail him or those he considers weak, even if the failures are minor. Furthermore, his delusional sense of omnipotence is such that he compares himself to natural disasters, namely something that is far beyond what humans can compare to and fight against. As a result of this, he believes the Demon Slayers to be a group of deviants who cannot accept the "natural" orde...

Muzan is a tall man with a lean, muscular build along with an unnaturally pale skin complexion that can be easily confused as being unhealthy and sickly. He has parted, short-length, wavy black hair, with two sets of curly, wavy bangs on each side of his face in the middle. He has sharp, almond-shaped eyes with irises that are a vibrant red color with black, vertical cat-like pupils, in addition with visible cracks around the pupils. He also possesses sharp, blue nails that fades into a light blue color at the tip. Physically, he appears to be in his twenties. During the Heian period, Muzan's appearance as a human wasn't very different from his current look, only lacking his fangs and slit pupils. Interestingly, a model sheet revealed that his eyes were still a red color. Muzan wore a sokutai outfit, with a black robe highlighted with gray patterns and a kanmuri headwear. When he grew increasingly sickly, Muzan then wore a plain white kimono, long hair, and had visible eye bags. In his first appearance, Muzan was shown wearing a white fedora with a dark-mahogany ribbon and a somewhat extravagant outfit, consisting of an embroidered black tuxedo with brown buttons and a white tie over a black dress shirt and white dress pants. He also wore black loafers. However, due to his ever-changing disguises, Muzan is not limited to style of dress. As seen in Rui's memories of meeting Muzan, the Demon King once sported a slightly different hairstyle and outfit in the past. When he met Rui, Muzan's hair was straighter and parted down the middle. He also wore a loose-fitting tuxedo and a white half-cloak over it, which he also wore while demoting Kyogai, albeit with his curled hair and fedora. From the Sengoku period to when he met Hantengu, Muzan wore a black kimono with faint ornamental patterns. However, Muzan's hairstyle evolved throughout the centuries; his hair was short during the Sengoku period when he met Michikatsu and Yoriichi Tsugikuni, grew significantly longer when he met Hakuji and Doma and turned them into demons, and finally covered his eyes when he encountered Hantengu. During his meeting with the Lower Ranks of the Twelve Kizuki, he arrived disguised as an elegantly dressed woman, causing the Lower Ranks to not initially recognize him. His hair was set in a chignon, and he wore a black hikizuri with a floral pattern, a white nagajuban beneath this, a paisley-patterned black and gold obi tied in a tsunodashi musubi knot, and white tabi socks. Later, while posing as Toshikuni, the adopted sickly son of an old couple, he takes the form of a young child with pale, white skin and black, silky smooth, neatly combed black hair. His main outfit in this disguise is a plain white button-up shirt and black cargo shorts with long tube socks and loafers. During his meeting with Kagaya Ubuyashiki, Muzan donned a lavish three-piece suit consisting of a white collared shirt, a black tie, a black and gray paisley waistcoat closed with gold buttons, and a white suit coat. He wore a pair of white formal trousers, light brown dress shoes, and completed his attire with a long black collared overcoat. After he neutralizes Tamayo's human-conversion drug and emerges from his flesh cocoon, Muzan's hair grows in length and turns white due to Shinobu Kocho's poison accelerating his age. He also grows numerous mouths all over his limbs, each one lined with a set of incredibly sharp teeth. His body also appears to have a dark red scale-like mass growing from his limbs, his forehead, and his entire lower body. It is later revealed that Muzan has an array of scars all across his body from the wounds inflicted during his battle against Yoriichi, which had burned down into him at a cellular level and never fully healed despite happening over four hundred years ago. These wounds are not visible in plain sight and only come to light when his regeneration weakens. While on the verge of being defeated by the Demon Slayers, Muzan adopts an enlarged demonic infant form in an effort to protect himself from the dawn's light. He is approximately as tall as a 3 story building when standing up, has very pronounced blood vessels across his body, small claws in his hands. and fanged teeth in his mouth.

Overall Abilities
As the Demon King, the first and the progenitor of his kind, Muzan is the strongest demon in existence. Even after dissolving a drug that was supposed to weaken his powers and turn him back into a human, Muzan easily annihilated close to a hundred Demon Slayers in a short period of time effortlessly. In his bout with a marked Giyu Tomioka and Tanjiro Kamado, the former stated that an Upper Rank's strength is incomparable to Muzan's, while the latter was unable to even follow his attacks and could only dodge by pure instinct. After Tanjiro got close to the Demon King, Muzan nonchalantly slashed out Tanjiro's eye, and he later stated that his attacks were too fast for him to detect through smell. Muzan singlehandedly overpowers 4 Marked Hashira and 3 Hashira-level Demon Slayers simultaneously. After unleashing whips in his back to fight with, Muzan massacred dozens more Demon Slayers and was stated to be too fast for Obanai Iguro, who remarked that he couldn't continuously breathe even with the assistance of Giyu and Mitsuri Kanroji and was constantly being damaged by the Demon King's attacks. As Muzan's attacks got fiercer and faster, even a marked Gyomei Himejima was pressed back by his attacks, while Mitsuri was completely unable to see his attacks in the first place, being forced to dodge based on pure luck and instinct, eventually getting overpowered and severely wounded by Muzan's whips. Obanai also remarked that to buy even one second for dawn to arrive against the Demon King, the Demon Slayer Corps would have to sacrifice the lives of numerous Demon Slayers, further exemplifying his immense power. Even with the arrival of Kanao Tsuyuri, Zenitsu Agatsuma, and Inosuke Hashibira to assist the current combatants and gain a momentary advantage, their monumental efforts were wiped out when Muzan unleashed hidden whips along his thighs that were even faster, allowing him to completely overwhelm Giyu, Gyomei, Sanemi, Obanai, Zenitsu, Inosuke, and Kanao, even if the former four were marked and the latter three were initially hidden and had the element of surprise. Moreover, Gyomei's leg was slashed off and Giyu's right arm was severed, while the others were severely injured from the attack with the exception of Kanao, who was nonetheless left paralyzed with fear in the face of such ferocious strength. When Tanjiro, who had mastered Sun Breathing after observing the movements from the strongest Demon Slayer in existence and saved Kanao by slashing off Muzan's arm, had arrived to face him, the two were able to trade blows with each other. Even when the effects of the aging drug started becoming significant and Obanai quickly recovering to assist Tanjiro, the latter stated that the Demon King is still extremely strong despite the drug making the Demon Slayers' attacks effective and his once endless vitality becoming depleted in trying to decompose it. After being driven into a corner, he unleashed a new technique which overwhelmed and incapacitated both Obanai and Tanjiro. Furthermore, despite his draining stamina and the drug weakening him, the Demon King could hold off the combined strength of Inosuke, Zenitsu, and Tanjiro together by himself. As dawn arrived and Tanjiro had pinned Muzan to a wall to prevent him from escaping, the Demon King unleashed a shockwave that blew off the Demon Slayer's arm and overpowered Sanemi, Mitsuri, and Obanai in the process. As a last-ditch attempt at escape, Muzan made his flesh swell immensely, exponentially increasing his size in order to protect himself from the sunlight. In this state, it took the combined might of all the Demon Slayer Corps to keep him from escaping and bring an end to the Demon King once and for all. However, Gyomei, Mitsuri, Obanai, and Tanjiro were killed in the confrontation, while the rest of the combatants were left fatigued and heavily injured. Despite this, Muzan still managed to pass on his blood and will to the deceased Tanjiro, reviving him as the new Demon King. Genius Intellect: Having lived for over a millennium and gained further experience from the telepathic link with the demons he controls, Muzan is extremely clever and erudite. Since he has five fully functioning brains, it would most likely boost his intelligence and other mental capabilities such as memory and cognitive processing. He was able to evade the Demon Slayer Corps for nearly a thousand years despite the leaders of the Corps, the Ubuyashiki Family possessing great foresight and intuition, and he has also used demons to create distractions somewhere far away when he wants to hide something from the Corps. Even as a recently transformed demon, he was skilled at reading the negative emotions of others and was able to manipulate his five wives into committing suicide. Muzan swaying Daki to do his bidding. Muzan was shown to manipulate demons to do his bidding without them even realizing at all, such as compelling Sus...