Father of Kurou, Hayate and Chiya. Yasha is the elder brother of Shou Osora, but not by blood. He was very close friends with his adoptive brother up until the meeting of the Dark Priestess, Miyako. Yasha fell in love-at-first-sight. Unfortunately, Yasha was rejected by Miyako, because of her feelings towards Shou. However, Shou turned down Miyako because she was childish, but in fact he was also aware of Yasha's strong feelings for her. It seemed that Shou was betraying Yasha more and more. He disapproves of Kurou and Hiyo's "engagement" and has a deep hatred towards humans, since they killed his mother.