Monaca is an elementary school-aged girl. She has short green hair tied with a red ribbon and matching eyes with a distinct manji pattern as the iris. She wears a knee-length dress with a decal of a pelvis and spine on its back. Monaca wears the silver Warriors of Hope badge on the collar of her dress. Monaca is seemingly very amiable and caring. She appears very cheerful and has a childish way of talking, sometimes meowing and almost exclusively referring to herself in the third person.