Zetsubou Izanagi is a member of the Criminal Organization known as Jūsanseiza, he's also part of the ruling four members, known only as the Quadrumvirate, along with Iwanaga Yamatsumi, Idzumo and Dōkeshi Fujiwara – he's acknowledged as one of the greatest Child Geniuses of Soul Societies history, despite having been erased from all files after his defection, his genius is so great that he finds minimal difficulty in most tasks, and that he can master very advanced techniques in a very short time.