- Voice Actor (CV)
- Ai Kayano
- Gender
- Female
- Birthday
- June 16
- Role
- Protagonist
- Identity
- A disciplinary committee member at Prefectural Haneyama High School and a member of the 'Jien-Otsu Club.' Having grown up alongside Ruita Kido since childhood, she firmly declares herself his rightful fiancée, backed by a marriage registration form the two secretly signed in their youth.
Personality
Tsundere
Meticulous & Serious
Secret Daydreamer
Fiercely Proud
Ai is Ruita's childhood friend who has kept a marriage registration form—signed by the two of them in secret long ago—as her personal proof of their engagement. Originally tasked with shutting down the 'Jien-Otsu Club' as a disciplinary officer, she inadvertently exposed her own hidden notebook filled with elaborate fantasies, ultimately joining the very club she sought to disband. Outwardly composed and strict, she is inwardly prone to intense blushing; whenever her emotions spiral out of control, she famously shouts 'Ai's going for a lap outside!' before bolting through the door in a frantic sprint.