Narukawa Mahiru

Cheery, and always the heart of the group around her friends.
Prides herself in her excellent scores in rhythmic gymnastics. She enrolled in Meiran Girls Academy as a sports scholarship student.
Although virtuous, and trusted by her friends, she also has a short temper, and snaps at enemies without self regard.
Tough on the outside but weak on the inside. She hates losing and turns into a big crybaby when she's beat.
Persistent to the point she always gets her way.
Trusts the protagonist as her physical educator. She always asks him, "Would you be my club supervisor?".