MuzMuzan is the powerful King of all the Demons, muzan is the powerful King of all the Demons, who has the ability to inject his victims with blood that allows him to convert them into more Demons He describes himself as a “infinitely ideal being” and is narcissistic to the core. he needs a blue spider Lilly to be powerful. Yoriichi is a tall man with a muscular build, fair skin, maroon eyes, and long spiky hair with red tips that he kept in a ponytail.