KucabaraMain Character and third son of the great demon king. Banished from the Demon World, Kucabara decides to become a Defense Devil in order to make a living and to gather dark matter. Despite being a demon, he possesses a kind heart and is willing to use the dark matter he has collected from his clients to help them.
BichulaOnce a member of a famous dragon family. He is a small imp-like creature who was banished alongside Kucabara from the Demon World.