Large mice are pack monster girls about the size of a human child. They have several unusual propensities, even among the monster girls. Large mice are one of the few species that don't default to monogynous relationships, preferring to all share a single male mate. Like dark elves and devil bugs they consider it entirely normal for daughters to have sex with their fathers. And the mice share with werewolves the ability to monsterize human women by biting them.