Webit has been announced that there is a traitor among the demon corps killing slayer on missions and it is assigned to kaigaku, giyuu, and kanao to stop them and this arc. Webboth kaigaku and zenitsu were faced with stronger enemies and the choice of becoming a demon, but whereas zenitsu didn't give up and kept on fighting even though he was. Webkaigaku (獪岳 kaigaku) was a former demon slayer and uses the breath of thunder in the kimetsu no yaiba (demon slayer) series. After becoming a demon he replaced daki. Webas a demon, kaigaku retains his mastery of the breath of thunder, but it becomes warped by his demonic nature. He gains the ability to manipulate lightning and. Thunder breathing, kaigaku's blood demon art grants him special electrokinetic abilities which allow him to generate and. 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. Webkaigaku appeared in a flashback scene during season 4 episode 7. The manga revealed that kaigaku was the child responsible for letting a demon into the. 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.
