Nosomasan "Aizen" Sousuke

Nosomasan Sousuke ( 無し相馬はサン, Nosomasan Sōsuke) is the guardian captain of the Royal King in the Royal King; she later leaves and go Soul Society with his followers, Shayjin Tosogame and all guardian captians. Her friend was Yosochan Sogatome. She was the main antagonist of the series.