Hina Setoguchi

Hina Setoguchi is Yuu’s energetic little sister, known for an expressive personality that often mirrors Natsuki’s exaggerated emotional displays. While she maintains an upbeat exterior, she privately struggles with deep insecurities regarding her unrequited feelings for Koyuki. Beneath her bubbly nature, Hina is highly perceptive and empathetic; she has a knack for connecting with outcasts and sensing the hidden emotions of others, including recognizing Kotaro's affection for her.