Webunlike many other demons, he eschews relying upon his supernatural powers and focuses on perfecting his swordsmanship, the likes of which is unmatched by anyone alive. Webout of lust for power and the fear of death, michikatsu became a demon and took on the name kokushibo. Because he was also a breathing user, it took him three days to fully. Webkokushibo, previously known as michikatsu tsugikuni, is the older twin of yoriichi tsugikuni, recognized as the most powerful demon slayer to have ever lived. Webduring the sengoku era nearly five centuries ago, kokushibo was a human by the name of michikatsu tsugikuni (継 (つぎ) 国 (くに) 巌 (みち) 勝 (かつ) , tsugikuni michikatsu? Websince muzan lost interest in breathing swordsman, he nonchalantly tried to kill his twin, unable to sense any anger or aura of power in him. Instead, yoriichi was able to. Webthe relationship between yoriichi and michikatsu parallels the mythology of the shinto deities amaterasu and tsukuyomi, respectively. Amaterasu is the most sacred of shinto. Webmichikatsu’s father noticed a strange birthmark on the head of yoriichi, deeming it to be a birth defect and declared kokushibo would kill the marked brother until their mother,. Webmichikatsu got many buffs ever since he became a demon, starting with : Webmichikatsu then transforms into a demon through muzan after lamenting his inability to ever surpass yoriichi in power. Sixty years later, the two met for the last time.
