Aki Hayakawa is a demon hunter in the Public Security Bureau. He is tall and slender, has black hair in a ponytail and blue eyes. Outwardly, he looks like a cold and detached young man who despises demons, however, inside the guy is soft-hearted and cherishes his friends. Smokes. He is laconic and sometimes behaves rudely. Has contracts with the demon of Curses, with the demon of the Future and with the Fox demon.