Sakaki is an upper executive of Garyukai and an ally to Shiva Mikaido. As the one who had Shiva "resurrected" after he was killed by Wakasa, Sakaki is among the few who know about Shiva's true circumstances, and calls him "Shiva" instead of "Misumi". He doesn't have the patience to entertain Shiva's chasing after Tsukasa. After he finds out that Tsukasa is a girl, Sakaki betrays Shiva and announces himself to be the new don of Garyukai. During the final battle between Garyukai and Kuryugumi, Sakaki is mortally wounded by Rai, one of the technologically advanced humans of Garyukai, and finally killed by Shiva.