Weba user asks about zenitsu's letter and his grandfather's death in the manga series kimetsu no yaiba. Another user replies that the letter was from a bird and that kaigaku became. Webas revealed in demon slayer chapter 144, titled successors, zenitsu’s letter brought him news about the sudden death of his master and former thunder hashira, jigoro. Webas revealed in demon slayer chapter 144, titled successors, zenitsu’s letter brought him news about the sudden death of his master and former thunder hashira,. The news alters his path and ignites a new fire.
