Along with Anna, Karin is one of Ririka's best friends. They are in the same 4th grade class together at White Dove Academy (白鳩å¦åœ’) and hang out together regularly both at and away from school. Karin is a very genki girl, and also quite excitable. Karin is very interested in cool guys, and every time she tells her friends about a new place to shop (usually somewhere selling food), there's inevitably a cute guy that works there that Karin is interested in.