Jun 21, 2022, 7:33 pm updated: Jun 24, 2022, 1:17 am. In demon slayer, the twelve kizuki was introduced. The highest position goes to upper rank one or upper. Webkokushibo's real name is michikatsu tsugikuni, the twin brother of yoriichi tsugikuni, the inventor of sun breathing. He is also the first demon slayer to become a. Weblearn about kokushibo, the upper rank one of the twelve kizuki and the former demon slayer who became a demon after being jealous of his brother yoriichi. Weblearn about kokushibo's dark past, personality, abilities, and relationships in this comprehensive article. Find out how he became a demon, why he hates his brother. He is the elder brother of yoriichi tsugikuni, the. Webkokushibo is a former demon slayer who became a demon after inventing moon breathing. His real name is unknown, but he is the older brother of yoriichi.
