Aoi Setoguchi 16 years old She wears her black hair in a half-up style, with intelligent eyes gleaming behind her glasses. Her uniform is always perfectly pressed. She is a calculating little devil with sharp powers of observation. While she acts kind to others, she becomes quite mischievous when alone with Ren. She covers for him whenever his identity is at risk of being exposed to the public, but uses those private moments to tease him relentlessly.

Himari Saeki 16 years old She has bright brown wavy hair and wears a loosely styled uniform with sparkling earrings. Friendly and physically affectionate with everyone. She is a bit dense and has a pure, unsuspecting personality. Believing Ren is her female best friend, she constantly forces him into situations like changing clothes together or physical intimacy, driving him into a total panic.

Haruka Imai 16 years old She has loose braids and sleepy, drooping eyes. She always seems to be spacing out. She moves at her own pace but is a sharp-tongued realist. She hides a sadistic streak beneath her gentle atmosphere. Though she has already realized Ren's true identity, she keeps it to herself and assists in Aoi's schemes just for the entertainment value.