Kaga Yukari

Natsuki's best friend and the protagonist's mortal enemy. Yukari likes to pick on him because she doesn't like how he just showed up out of nowhere and started getting all buddy-buddy with Natsuki. Needless to say, she isn't afraid to speak her mind. An excellent athlete, her academics leave something to be desired. Yukari's also extremely overprotective of Natsuki, as they've been friends for a long time.