Kokushibo is reserved, silent, and aloof, maintaining an aura of unnerving tranquility and mystery that compliments his position as Upper-Rank One. Frustrated from being unable to surpass his brother, Yoriichi, and his sun breathing. Michikatsu was persuaded by Muzan and became a demon, taking the name Kokushibo. He was so afraid of death that he allowed himself to become a Demon and therefore immortal. Mysterious, composed, grim, serious and yet honorable, is a serious person who loves to fight