The Yamato King is the king of the Yamato Tribe, and Geki's adoptive father. Geki's birth father, the Black Knight, had spoken out against the Yamato King, and he adopted the Black Knight's younger son as punishment. The Black Knight took this opportunity to attempt to overthrow the Yamato King, but was killed. Burai, the Black Knight's elder son and Geki's older brother, swore revenge on the Yamato King for killing his father. However, the Yamato King was instead killed in the war against the Witch Bandora. Burai then decided to take his revenge on Geki instead.