Naru is Usagi's best friend, though she appears less and less as the other Senshi show up and the story progresses. Despite being Usagi's best friend, Usagi's is jealous of Naru at because she thinks she is prettier and smarter, than she is. She is somewhat aware of Usagi's destiny at times. Her mother owns a jewelery store and she has a little sister, who only appears in one of the side stories.