Kibutsuji Muzan

"Does my complexion look terrible to you? Does my face look pale to you? Do I look weak to you? Does it look like I haven't got long to live? Does it look like I'm close to death?"

- Kibutsuji Muzan

"I now imagined that it would be better for the Twelve Demon Moons to consists of Upper Moons."

- Muzan before purging the remaining Lower Moons after considering them to be weak

Kibutsuji Muzan (kanji: 鬼舞辻無惨, hiragana: きぶつじむざん) is the main antagonist in Demon Slayer: Kimetsu no Yaiba manga and anime series.

He is the first Demon in the series and the progenitor of most other Demons and the main Antagonist of the manga and anime Kimetsu no yaiba. He is also the enemy of the Kamado family and Kamado Tanjiro's archenemy. He is the one that killed the Kamado family, turned Nezuko into a demon and made Tanjiro an orphan.

He is voiced by Toshihiko Seki, who also voiced Aaroniero Arruruerie (while disguised as Kaien Shiba).

Personality
"In this world, there is only one demon whose blood flowing in its veins has the power to turn humans into demons."

- Suggestions in Chapter 11

As the leader of demons under the pretense of a civilized and innocent man, Muzan is deep down a callous, ruthless and extremely narcisstic perfectionist with a horrendous scale of self-absorb streak. He never tolerates anyone who mocks him, even to the point of killing a pair of drunk bystanders who were simply rude to him, alongside their female partners, while proclaiming his own delusional grandeur.

Muzan is also shown to be intolerant towards failure, shown when he purged the Lower Moons after the death of Rui the Lower Moon Five, simply because he believed the Lower Moons were becoming nothing but his useless failure, and he only needed Upper Moons to do his dirty work instead. In spite of this, Muzan only spared Enmu, the Lower Moon One, because he admired Enmu's sadistic streak which the latter had shown when facing certain death.

Muzan also sees his subordinates as nothing but useful tools towards them, and all of his subordinates were formerly human who followed him because of their hopeless life or sadistic streak. Muzan lures in people at their lowest to become demons, often corrupting them wholly. Gyuutarou, Daki and Akaza are prime examples of this.

To prevent himself from being exposed, he curses his subordinates in a terrifying manner so that none of them may utter his name, or else they will be killed instantly in a morbidly cruel manner. This showed him to be a hidden paranoid coward and fueled Tanjiro's disgust towards him, causing Tanjiro to believe Muzan is the only true demon in the world. Interestingly, this almost paranoic sense of self-preservation, contrasts with his megalomania.

History
Coming Soon!

Trivia

 * His first name, Muzan, means miserable and it also means atrocity, cruelty, cold-bloodedness, tragic, pitiful, and merciless. Among them, "tragic" and "pitiful" are rather ironic because Muzan is a cruel person sought to bring tragedy upon his victims.