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. Webafter an existential discussion of what it means to be a demon slayer and a human, kokushibo offers gyomei an opportunity to become a demon so he can survive and. Webbut here's everything you need to know about who is kokushibo in demon slayer, upper rank one demon. The real powers of the demons who are a part of twelve. Webkokushibo holds immense respect for the hierarchy system, with respect to the twelve kizuki, and especially towards muzan. He is a powerful demon, only inferior. Kokushibō, yoriichi’s brother, requested muzan to convert him into. Webdue to having muzan kibutsuji's blood, kokushibō can use the blood demon arts, which makes him terrifyingly powerful. Kokushibō's blood demon art is. Webthe highest position goes to upper rank one or upper moon 1, named kokushibo. Who is kokushibo, and what are his abilities? Is he stronger than muzan or. Webkokushibo holds immense respect for the hierarchy system, with respect to the twelve kizuki, and especially towards muzan. He is a powerful demon, only inferior.