Kisaragi Mizuha

"Noble Silver Bird Dancing on Ice (氷上を舞う気高き銀鳥)"

A figure skater who aims to become the world champion.
She is the protagonist's childhood friend with whom he has reunited after spending two years abroad training figure skating.

She's not only famous, but also gives off a cool and mature impression which makes people treat her as an "aloof and cool woman". However, when one gets closer to her they would learn that she's tolerant, accepting and gentle girl.