Kiriyama, Omi

桐山臣

Omi is a second-year student at Kouta's school who is actually a sickle weasel with the ability to control the wind. He was once the bitter enemy of the Minamoto siblings. In the fourth volume of the novels, he becomes the gang leader of the delinquents at his school. He dislikes the friendship between Kouta and his friends, and does not speak much. In the anime, he accidentally hurts Kouta, who took a blow for Chizuru.