A traditional warrior who practices with a wooden bokken in full practice armor at the dojo before and after school. Karin often talks like a medieval samurai though she wishes to exemplify the traits of a proper Japanese woman. Is terrifyingly powerful when in her armor but surprisingly meek without it. Wishes to join the bunny club because she's in love with Shinsuke but doesn't own a bunny suit so she tries to dress as one wearing hair ribbons and a school swimsuit instead.