Webas kaigaku wallowed in his jealousy, it was muzan kibutsuji, the original demon, who preyed upon his vulnerabilities. Muzan recognized kaigaku’s thirst for. Webkyogai (響 (きょう) 凱 (がい) , kyōgai?), also known as the drum demon (鼓 (つづみ) 鬼 (おに) , tsuzumi oni?) was the primary antagonist in the tsuzumi mansion arc of. Webkaigaku is one of the supporting antagonists in the infinity castle arc in demon slayer. Originally, kaigaku was a demon slayer who was a disciple under the. Websince kaigaku is on of the 9 children gyomei took care of as a monk before becoming demon slayer, who also bears quite a grudge against kaigaku who brought tragedy on. Webhowever, the hashira training arc proved that kaigaku was the cowardly one. During a mission, he is confronted by the demon kokushibo (ryōtarō okiayu/jonah. Webkaigaku had the unfortunate luck of encountering kokushibo and, upon witnessing the latter's immense power, kneeled before him and begged to become a demon. Webzenitsu agatsuma vs kaigaku is a battle that took place in the infinity castle. It focuses on the battle between demon slayer zenitsu agatsuma against upper rank six kaigaku. Webkaigaku is a member of muzan's twelve kizuki, with ties to gyomei himejima and zenitsu agatsuma's past. Kaigaku's betrayal led to gyomei's imprisonment and. Webkaigaku’s past involves being a former demon slayer and the senior disciple of zenitsu agatsuma under jigoro kuwajima, the former thunder hashira.
