Kaima is Kokū's rival and the other creator of madōgu. Kaima is a madman who desires to create weapons to kill. He is eventually killed by his fellow kinsmen, but he transfers his spirit to his last creation: Tendō Jigoku. He is very similar to Kōran Mori in terms of personality.
Kaima was one of the creators of the madōgu and was a candidate for leader of the Hokage Clan.