the demon known as Kokushibo was still a human Demon Slayer by the name of Michikatsu Tsugikuni. He was the older twin brother of the legendary Demon Slayer Yoriichi Tsugikuni. Yoriichi himself ...

Very few Demon Slayer characters have the backstory and imposing feeling of Kokushibo, the first Upper Moon and Muzan's most loyal demon. His abilities with the blade are some of the best in the ...

The Infinity Castle arc in Demon Slayer is one of the most intense and emotional arcs because many characters' stories ... sad finish while fighting against Kokushibo, Upper Moon One.