Webas the demon slayer corps launched their final assault on muzan and the. Webkokushibo was the second strongest demon in the series, only. Webdue to having muzan kibutsuji's blood, kokushibō can use the blood.

Webafter becoming a demon and witnessing the death of his brother, however, he realizes. Webthe tragedy struck when kokushibo’s beloved wife fell terminally ill. Webmichikatsu chose to betray the demon slayer corps with the growing fear of dying.