The short answer is, every kind. There are sporty girls, girls who never played sports, tough girls, nice girls, moms, wives, grandmothers, big girls, small girls, girly-girls, tomboys, business professionals, punk girls and every other type you can think of.  Roller derby isn’t for a specific type of girl, it just happens to attract all types including ladies who normally wouldn’t have an interest in other types of sports.