Amano's overall character and origin in the manga and OVA series differ greatly. In the manga, he is stated to be the offspring of a human and demon and therefore is a hybrid of both. Due to his many misdeeds involving Mimi, daughter of the Elder, he is banished from the demonic realm and spends 300 years in the human world. In actuality, the Elder sent Amano to find the Chōjin, a demonic god who's dormant spirit is sealed in the body of a human. He has a rather selfish and amoral personality, with him claiming to women that his sperm can protect them from demons if they have sex with him. He is also shown to have no respect for human life, one example is during his first appearance when he tosses a baby he saved from an oncoming truck into a storm gutter to drown, wondering why he even bothered to help the infant at all. It is implied shortly thereafter that he enjoys seeing blood and death, stating that he never expected to find carnage so soon. He is joined in his search by his human sister Megumi (who has been given demonic powers without being a demon herself) and Kuroko; a small lesser demon who has nothing but respect for Amano despite his flawed personality.