Muzan Kibutsuji

Muzan is a demon, the first of the demons in the world, his age is more than a thousand years. Gender male. Height is about 179 cm, weight is 75 kg. There is only one O'ni in the world whose blood that flows through his veins has the power to turn a human into a demon. And that is Muzan Kibutsuji. He is the first of his kind demon, the progenitor of all other demons. Muzan appears to be a man in his twenties. He has wavy black hair and red eyes. Muzan dresses very extravagantly and wears a white hat with a red ribbon. Muzan is ruthless and tries to bring each of his plans to perfection. He does not forgive the Moons for incompetence and failures, but can praise them for successfully completing a mission. Kibutsuji does not take his enemies seriously. Muzan also does not like being asked questions or given orders. He is prone to narcissism. His inflated ego and delusional sense of self-worth is so great that he cannot stand to be mocked or corrected, believing that others exist only to serve him. This also means that he rarely takes any opponent or threat seriously. He has brutally murdered a pair of drunken men simply for being rude to him, and murdered their female companion when she did nothing, all while proclaiming his own perfection and superiority over them. Furthermore, his delusional sense of omnipotence is such that he compares himself to natural disasters, namely, things that are far beyond what a person can compare themselves to and fight against. As a result, he believes that the Demon Slayers are a group of deviants who are unable to accept the natural order of things and regain normalcy when other people simply move on after a tragedy. His analogy is indicative of a complete inability to feel empathy or remorse for his actions, given that none of the murders he has ever committed (directly or indirectly) have been the result of accidents, but carefully planned acts of pure evil. He has shown himself to be quite manipulative and cunning, able to fit in well in human society, even having his own family. His long life and continuous practice have allowed him to take on many roles in society and play them wisely, including children and women if he chooses. This life has also given him great intelligence and the ability to think tactically. Muzan is a clever strategist, able to quickly and fairly well deal with adverse situations, although this may also be because losing his subordinates means nothing to him in the long run. Due to his apparent superiority and two-faced nature, he feels little affection for his minions, using and discarding them as disposable pawns whenever he pleases. He does not allow his subordinates to question his will, regularly using brutal repression. Many of his subordinates, in turn, deeply fear him and watch their words and thoughts carefully, afraid to say anything that might upset him. They cannot even dare to think anything that might be perceived as hostile by Muzan, as he can read the minds of all the Moons. He is able to sway many demons to his side with promises of power, revenge, and greatness so long as they serve him. His intellect and manipulation shine here, as many find these promises quite appealing, as he encounters many of his subordinates at their lowest point, when their emotions are easily fed to him. Alas, all of these promises are ultimately false, considering that Kibutsuji only cares about himself and has no qualms about killing his own men to protect his own safety. When he is not hiding behind a facade, his malice and overflowing violent intent are so incredibly vicious that they can be perceived by others. In particular, Yoriichi Tsugikuni described him as boiling magma erupting from a volcano, ready to engulf everything. As proof of this, he curses his subordinates in a terrifying manner so that none of them will utter his name, or they will be immediately killed in a painfully brutal manner. Interestingly, this almost paranoid sense of self-preservation contrasts with his delusions of grandeur.

While Muzan was still in his mother's womb, his heart stopped several times. He was born without a pulse and did not breathe, which is why he was considered stillborn, and only let out his first cry when he was about to be cremated. When Muzan was a young man, he was diagnosed with a disease that would cause him to die before he reached the age of 20. The doctor treating Muzan gave him a prototype of a cure, but Muzan, angry that his condition was getting worse, killed his doctor. He later realized that the cure had actually worked, and his body had become stronger. It was easy for him to eat people to survive, but he faced another problem: he could not be in the sun. Because sunlight was now deadly to him, Muzan was forced to live a nocturnal lifestyle, which made him very angry. At that moment, he deeply regretted killing the doctor before he finished developing the cure, called the “blue spider lily”. Muzan searched all over the country for the spider lily that was part of the medicine, but could not find it, so he began to create more demons. He wanted to spread the demons throughout the world, hoping that one of them would eventually be able to defeat the sun, or at least find the blue spider lily, which would allow Muzan to become a perfect being. During this time, he also met Michikatsu Tsugikuni, a demon slayer who wielded the breath of the moon. Knowing that Michikatsu was afraid of dying at 25, Muzan promised him immortality and incredible power. Michikatsu, who had always been jealous of his younger brother, accepted the offer and became a demon named Kokushibo, serving Muzan as the first upper moon. One day, a demon slayer with the breath of the sun almost killed Muzan, but the man survived and henceforth became more careful with all people who had or could have this breath. The distinguishing feature of these people were hanafuda earrings. Muzan later decides to create a group of twelve of the strongest demons, dubbing them the "Twelve Demon Moons" for his potential protection and uniting them with two goals: eliminating all demon hunters, as well as finding his treasured cure. Natural Abilities: Regeneration: Muzan can remain alive even if his body and head are completely destroyed. Extrasensory perception: He can sense the presence of other demons or someone's thirst for blood. Absorption: The man can absorb other demons or objects. Poison Resistance: His body is much more resistant to the poison from wisteria, which is deadly to normal demons and can kill them in a matter of seconds. Telepathy: The ability to read the minds of those he has shared his blood with. He can know what other demons are doing, saying, and thinking. The further away the demons are from Muzan, the harder it is for him to read their minds and determine their location. Immortality: Since taking the medicine called "Blue Spider Lily", he can live indefinitely and is immune to disease. Durability: Even after a massive explosion, his body can remain almost unharmed.

Known Attacks and Techniques: Demon Blood: Muzan Kibutsuji's blood is capable of changing every cell of another person, turning them into a demon. Not every person is able to withstand the changes that occur in the body after receiving demon blood. A weak person dies in terrible pain and suffering, and a strong one receives some power: increased endurance and physical strength, increased regeneration speed, eternal youth, immortality, change in body size. Also, a demon can later independently develop his strength, creating his own demon blood techniques, thereby further increasing his strength. Demon blood has several disadvantages: an overdose of blood leads to the destruction of cells in the body, a thirst for human flesh, intolerance to sunlight and instant burning in it, also the poison from wisteria flowers is fatal for them; after death, the body turns to ashes and disappears without a trace. Curse: Muzan, in turn, is capable of some control over the bodies of demons. As described above, this includes reading thoughts, sensing their location, and the ability to destroy a demon's body if Muzan so desires. However, only two demons have been able to escape his curse, those who do not wish to eat humans and who choose to lead a pacifist lifestyle. Blood Demon Techniques: Techniques created through the manipulation of demon blood, which can vary greatly in their application.

Weaknesses: Sunlight: Muzan is noted to be immune to killing via decapitation, as seen when Gyomei destroyed his head and he still managed to regrow it. He can also instantly regenerate wounds from decapitation, as seen when Obanai decapitated him. As such, the only known way he can be destroyed is by sunlight.