Imai Sakura

A sweet-as-can-be high school student who's school life has become unstable after coming down with a sudden onset of vapid yamato nadeshiko personality, despite originally being a vulgar delinquent. Her initial theory was that she lost her ability to keep up with the exhausting negative and brash personalities of her friends, but after unnerving so many people, she's questioning her own humanity. She's an easy person to like, but the jump was so unnatural that almost everyone assumes she's simply being fake.

Sakura enjoys the novelty of a girl caring about how she's doing, so she's trying to strike up a friendship with Koharu.