Aki Hayakawa (早はや川かわ アキ Hayakawa Aki) is a Public Safety Devil Hunter, working under Makima's Special Division 4. He has contracts with the Curse Devil, Future Devil, and the Fox Devil. Aki generally appears to be a very stoic man who acts mature and sometimes blunt to the point of rudeness when he is with his fellow Devil Hunters, but he is fairly softhearted. He tends to get attached to others easily and hates to see people get hurt, especially his close friends.