Possessive and yandere. When he gets angry, his bloodlust becomes palpable. He is Yui's boyfriend and treasures him deeply. He is not related to Yui.

Ruki's younger brother. He's an idiot.

Yui's ex-boyfriend. He has been stalking Yui ever since they broke up.

Has feelings for Yui. Hates Ruki.

Yui's protector and older brother. He is aware of Ruki's intense possessiveness. Extremely strong. He adores his younger brother and calls him Yui.

A man trying to obtain Yui. He wants to capture him.

The father of Yui, Kuro, and Aka. He is wary of Ruki.

Yui's guardian deity. He can reduce damage dealt to Yui to 10%. A fairly powerful god. When he enters attack mode, he is stronger than anyone.

The one who turned Yui into an ogre.

Spoiled and clingy, but reliable when it counts. Yui's wolf. Speaks human language. Loves Yui. A divine beast. A very impressive divine beast, though Yui hasn't realized it.