Omi Kiriyama

Voiced by: Takashi Kondo (Japanese), Bryce Papenbrook (English)

Omi is a second year student at Kouta's school who is in fact a sickle weasel with the power to control the wind. Omi was once the bitter enemy of the Minamoto siblings. In the fourth volume of the novels, he succeeds as the gang leader of the delinquents at his school. He hates the friendship between Kouta Oyamada and his friends, and does not speak much. In the anime, he accidentally hurts Kouta who took a blow for Chizuru Minamoto. Since he is not permitted to harm humans, such an act has serious consequences for him. He thinks Mio is pretty.