Websimultaneously, the mist hashira, muichiro tokito was separated from the stone hashira, gyomei himejima by nakime's blood demon art, falling into the location of the most. Webkokushibo (黒 (こく) 死 (し) 牟 (ぼう) , kokushibō?) is a major supporting antagonist of demon slayer: He is a demon affiliated with the twelve kizuki,. Webbeing the most powerful of all the twelve kizuki, kokushibo can figure out the combat techniques of two hashiras at a time and overpower them in a battle. Webit is interesting though to note the similarities and the differences in each demonic hierarchy, and even more fascinating to discuss each individual demon and.