The Future Devil (未み来らいの悪あく魔ま Mirai no Akuma) is a devil that embodies the fear of the future. After seeing Aki Hayakawa's future, he made a contract with him, so he can see that future himself. His name is Future Devil, not Future Rules. He sometimes chants "Future Rules!" as he dances. He really enjoys seeing people pass away as brutally as possible. He is often very playful and mocking around humans, often teasing and making fun of them as the dances and hums.