Yuuma Mukami
Yuma Mukami, formerly known as Edgar, is the third son of the Mukami household. The voice, body, and attitude of this rebellious do-S are all big. He often goes on rampages, but he falls asleep after he becomes bored. He can always be found munching noisily on sugar cubes. He is extremely perverted and hot-tempered.
As a child, he was timid and shy. However, those traits had to be deserted if he wanted to survive out on the streets with the other members of his rebellion gang. He grew violent, rough, and dominating with time.
Yuma is actually Shu’s childhood friend, Edgar. He met Shu when he was still a human, in the forest one night. Shu and Yuma became best friends, but Reiji destroyed Yuma’s village in a fire. Wanting to save his parents, Yuma went into the fire despite Shuu’s protest, and Yuma “died”. Later, it’s revealed that he somehow survived and woke up with injuries, but had no memories of his past or of what happened.