Webkaigaku's betrayal led to gyomei's imprisonment and jigoro kuwajima's death, fueling zenitsu's rivalry. Kaigaku became upper rank six of the twelve kizuki,. Webwhat was kaigaku supposed to do? The story treated kaigaku's decision to surrender to kokushibo and become a demon as abhorrent and unforgivable, but given kaigaku is not even a hashira level fighter and stumbled across the upper moon one, what else could he have done? Webin short, both muzan and ubuyashiki wanted a final confrontation, and they had the same strategy; Attract the might of the hashira and force a battle that would decide the fate of. Webdespite his injuries, zenitsu fights back against kaigaku’s ferocious attacks, using his own thunder breathing techniques. With the help of yushiro, zenitsu is able to. Webkaigaku (獪 (かい) 岳 (がく) , kaigaku?) is a supporting antagonist in the infinity castle arc of demon slayer: He is a demon affiliated with the twelve kizuki,. Webthe demon slayer series has finally reached the last arc, and the final part will pit tanjiro kamado and his comrades in a desperate struggle against muzan. Webhis final moments are marked by a scream of rage as his body disintegrates after zenitsu’s rescue by yushiro. What’s the history behind kaigaku. Kaigaku’s history is marked by. Webzenitsu agatsuma vs kaigaku (image via shueisha) zenitsu encounters his former senior, kaigaku— now a demon— in the castle.