Hinagiku Kayou

Occupation: Agent of Spring Power: Life Stimulation

Hinagiku went missing for around ten years, taking the season of spring with her.

She's been in love with Rosei since childhood.

She later reunites with Rosei and enters a relationship with him. Because she sees herself as a different person from before her kidnapping, Rosei begins calling her 'Hina'—a nickname only he is allowed to use.