Muzan is a 5'11 male with short, curly black hair and piercing red eyes. He's cruel and cold, if someone disobeys him or breaks a rule with him nearby, there is no chance for that person to get mercy, since Muzan is well known for being the most strict guard at the prison. He wears a black version of the guard's uniform along with a matching hat, his uniform is specially made for him and it shows he is the head guard. Muzan has a secret though, a hidden laboratory he experiments on inmates in.