Muzan Kibutsuji

Muzan Kibutsuji is the main antagonist of the popular manga and anime series, Demon Slayer: Kimetsu no Yaiba. He is the first demon that ever existed, and the merciless king of all demons who rules over his kind with an iron fist. He is also the one responsible for most of the horrible events throughout the series, among which include killing Tanjiro Kamado's family and turning his younger sister Nezuko into a demon. He is the arch-nemesis of Tanjiro and Nezuko.

Muzan is voiced by Toshihiko Seki in Japanese, and Greg Chun in English.