Yanagi

Fuyumi's father and the human doppelganger of the Haidora's family butler. After being told that his wife had merged with her doppelganger Nyen, he decided that he would raise their daughter by himself in order to give her a normal human life. Thus, though it broke his heart, he renounced his wife, insisting that she return to the demon world with Heads Hydra. His selflessness and sincerity — rare factors in the demon world — impressed Heads.