Webkokushibo prevented his natural demon regeneration, and let the demon slayers cut him down, saying that he didn't want to live anymore, and that he was cruel to not be. Webin his human days, kokushibo was known by the name michikatsu tsugikuni. He is the twin brother of yoriichi tsugikuni, the legendary demon slayer. Webas a human, kokushibo's appearance was nearly identical to his demon form, with the exception of the number of eyes, his prominent eyebrows, and notably less pale skin. Webkokushibo is one of only two known demon slayers who became demons later in life. His past is a dark and rather sad one weighed down by jealousy and an. Webkokushibo then offers his own blood and the power that kaigaku craves if that man is willing to accept him as an ally. And as he does, he threatens that if a drop of blood is. Webkokushibo was a human five centuries ago, during the sengoku era. Under the name of michikatsu tsugikuni, he is the ancestor of the current hashira muichiro. Webas yoriichi was still a demon slayer and wanting to rid his human past, he knew he had to kill his younger brother. Despite his old age, yoriichi's fighting stance in preparation to. Webkokushibo shares a physical resemblance with his brother, yoriichi, both before and after turning into a demon. His spiky, long black hair with maroon tips is kept in a ponytail.
