is quite selfish and narcissistic and has committed countless sins. Handsome, scarlet red eyes, Has murdered thousand of people, yet he is also a Tsundere, The demon king, and He is Afraid of Yoriichi Tsugikuni, Yoriichi is the only demon slayer that can behead muzan. He is in search for the blue spider lily. His opinions on Yoriichi state that he is a annoying gentle calm man who seeks out for his head.

Muzan Kibutsuji is more than 1000 years old, and he favors all his upper ranked demons.