Muzan Kibutsuji

Muzan Kibutsuji (鬼舞辻 無惨) is a Demon, the first of his kind, and the progenitor of most other Demons. He is also the enemy of the Kamado family. He is the one that killed the Kamado family, turned Nezuko Kamado into a demon and made Tanjirou Kamado an orphan.

Appearance
He looks like a man in his late twenties. Has curly black hair and eyes somewhat small, his pupils are vertical like cat eyes and plum red. Has on a white hat with red ribbon and a somewhat extravagant outfit.

Muzan has the ability to change his appearance as shown in the manga. During his meeting with the Lower Moon's he arrived disguised as a woman wearing a yukata and was not recognized by the demons.

Personality
Muzan is a ruthless individual that wants his every plan to be perfect. He isn't kind to his progenies only if they failed a mission or being incompetent. Also gives praise to those that are successful in their missions. He does not take his enemies seriously. He also dislikes being questioned and ordered by his progenies. He is also a narcissist.

History
He was inflicted with disease and will die before the age of 20. His disease became worse. He was treated by a doctor who gave him medicine, Blue Spider Lily, that can make his body stronger but it turned him a demon. In result, he can't walk during daylight.

Asakusa Arc
Traveling through a crowd in Asakusa with his family, Muzan is accosted by an angry Kamado Tanjirou. His daughter asked him who the young Demon Hunter was, and he asked the youth if there was something he wanted from him. His wife then approached them, asking if Tanjirou was somebody familiar to their family. He denied this, wondering if the youth had mistaken them for somebody else. He then quickly slashed a passing man, turning him into a Demon.

Trivia

 * His first name, Muzan, means miserable and it also means atrocity, cruelty, cold-bloodedness, tragic, pitiful, and merciless.
 * His last name Kibutsuji means Demon Dance.

Quotes

 * "Do you have something you want from me? You're in quite a panic.." Chapter 13, page. 16-17
 *  "I am a perfect creature that is infinitely close to perfection."Chapter 13, page. 17
 * "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?" Chapter 14, page. 16-17
 * "I want you to remove the head of that demon hunter with the hanafuda earrings." Chapter 14, page. 19
 * "I now imagined that it would be better for the Twelve Demon Moons to consists of Upper Moons." Chapter 52, page. 10
 * "It's only natural for demons to defeat Humans." Chapter 67, page. 8
 * "But over here, anyone who lacks the power of a Pillar pretty much can't tell the difference, because we look like humans." Chapter 74, page. 12
 * "There is a demon who escaped my control, just like Tamayo. Find her and put an end to her. Your the only one I can ask." Chapter 83, page. 5
 * "The Ubuyashiki family has yet to be entombed." Chapter 98, page. 14