皆瀬 初音

Hatsune, is same grade with Kaoruko, entered the dormitory building a year ago. Her parents went to New York because of her father's job, and she had to stay in Japan.
Hatsune is timid, so she was a little afraid of Kaoruko last year. Also, she is Yuu's caring onee-sama.
She joined the track and field club due to an admiration for Yukari, her former onee-sama (who graduated last year). This year she becomes the student council president in succession to Yukari and a finalist for the seventy-fifth elder sister.