Tsukasa is a member of Kyōshirō Shirogane's pack.
He was left with the Kōga Elder along with the other puppies from his pack. Later he and the others joined the fight against Victor and the Russian Army He participated in the battle against the hybrid bears.
Tsukasa and Ou army have caught in the volcanic eruption. He survives and is one of the Ou army Jinemon Kurohabaki locks the mine. Later, the dogs are released and they participate in the final battle Kurohabaki against the troops.