Kou manages a small shop in the Chinese area of Yokohama. He acts as Tokitou's doctor ("veterinarian"), despite the fact that he is unlicensed. Tokitou resents him and calls him various things like, "quack" or "unlicensed bastard." Kou sells various questionable odd and ends in his shop, including weapons and drugs and is good at getting information. He employs Kubota for odd jobs like deliveries.