Moskii has the appearance of a thin and tanned girl with white short hair with dark eyes. As a Mosquito, her physical traits are her bug-like wings, four insectoid arms, her black antennaes on her head, and her abdomen on her back.
Of all her bloodsucking roommates, Moskii is the most level-headed and usually gets along quite well with them. However, she can also be quick to anger when any of her roommates become unruly as she gets annoyed easily by their antics.