Motohama Shinya, also known by his dossier code IO-010, is a major character in the story, "A Dragon Darker Than Black." Motohama is a Contractor, a human with supernatural abilities. He is capable of intensifying the gravity of any target he chooses, so long as they are within visual sight. As a Contractor, he needs to fulfill a payment when he uses his powers, his being a worsening eyesight, hence why he wears glasses. To the Public Security Bureau, he is known by his dossier code IO-010, and is also known by his moniker, "The Gravity Master." He is rated as a Rank 1b Threat to Public Security.