Webwhile his life flashed before him, he admits that he abandoned everything and in the end, has achieved nothing by killing his only remaining blood relative and betraying his. Webit was in his moment of death that kokushibo realized that his desire for strength, his jealousy of his brother, and his fear of dying, led him to make the mistakes. Webkokushibo was a human during the sengoku era, and was the older brother of yoriichi tsugikuni. As a human, he was a powerful swordsman and respected. Webenraged as his deceased brother was once again about to be proven right, kokushibo is now more than ever determined to survive and sprouted blades all over his body, cutting. Webkokushibo (黒死牟, kokushibō) is the secondary antagonist of the demon slayer: Kimetsu no yaiba franchise. He is a member of the twelve kizuki, holding the position of upper. Webwhile his life flashed before him, he admits that he abandoned everything and achieved nothing by killing his only remaining blood relative and betraying his samurai code. Webafter he was decapitated, he turned into a hideous demon with large fangs, horns, and sharp appendages protruding from his body. Webmichikatsu chose to betray the demon slayer corps with the growing fear of dying under the effects of the mark and wasting all the years he gave into perfecting his martial arts,.
