revision preference src: Genchu taught Yori before leaving the Wataro clan, and saved Ken's life when Ken was a child. Genchu was also a more skilled warrior than any of the Demons of Sorrow, assembled to kill him. <SEP> tgt: Genchu taught Yori before leaving the Wataro clan, and saved Ken's life when Ken was a child. Genchu was also a more skilled Genchu than any of the Demons of Sorrow, assembled to kill Yori.