Ouga (オウガ Ōga, 40-42): The wolf-like king of the western Ashu tribe, sealed long ago with the rest of his tribe. Ouga was sealed within the mountain by Eiji's ancestors until Rei released him. He seeks and intends to eliminate Eiji claiming that his mother, Kei, who Ouga knew since they were young, cannot complete her travel to the other world with Eiji, the living proof of her "sin", still alive.