Maho is 18 years old, and cold and stern to strangers, but can be very caring to people she knows. Erika is 17 years old, and very hot-blooded and angry, but also embarrassed easily. Koume is 17 years old as well, and very shy and timid, but friendly. Erika has long silver hair, Maho has brown hair and Koume brown-reddish hair. Kuromorimine is a very prestigious and serious German-based school, with very strict curfews and rules. It's an all girls school.