|Kokushibo|

He is a member of the Twelve Kizuki, holding the position of Upper Rank One. As a human, kokushibo lived during the Sengoku Era nearly five centuries ago and was a samurai by the name of Michikatsu Tsugikuni, as well as the older twin brother of Yoriichi Tsugikuni, the progenitor of all Breathing Styles and the strongest Demon Slayer to have ever lived. He is also later revealed to be the ancestor of the Midt Hashira Muichiro tokito and his older twon brother Yuichiro. Despite being an incredibly talented swordsman himself. Michikatsu grew envious towardy Yoriichi for his unparalleled strength and ultimatety chose to become a demon when he realized that hid ambition of becoming as strong as his brother would not be possible to achieve if he remained as a human and to avoid the of the Demon Slayer Mark. He would then go on to and serving Muzan Kibutsuji as his right-hand man. Eventually, he was finally slain during the infinity Castle Arc by the Combined efforts of Muichiro, the Shinazugawa brothers Sanemi and Genya, and the stone hashira Gyomei Himejima, albeit at the cost of both Muichiro and Genya's lives. His demise would ultimately spell the end of the Twelve Kizuki and leave Muzan as the last remaining opponent of the Demon Slayer Corps. /// /// /// ALR I'M TIRED IT'S 2AM- ANYWAY BYE POOKS❤️