the main hero of this story. He is a nine-tailed spirit fox and, like the other members of the SS, is of ayakashi-human ancestry. Of them all, he is the most powerful. Soushi is usually calm, polite, and gentle to everyone, with a special soft spot for Ririchiyo Shirakiin. He blindly obeys her like a "dog" and always tries to protect her, even if his own life is at risk. He once served Kagerou Shoukiin.