Yuuna is the second Kashiwagi twin and, in sharp contrast to her sister, is very introverted and soft-spoken. She is often the victim of Yuuma's pranks and usually goes along with all of her plans. However, due to her personality and penchant to easily get embarrassed, she doesn't always do what Yuuma requests of her, like in one episode where she was to model some new clothes along with Yuuma but wouldn't, saying it was too embarrassing. They both get annoyed when Miyuki calls on either of them as "Kashiwagi twins" as if they are one person, though it is usually her sister that speaks up on their behalf. Yuuna ties her hair tied on the right side of her head with a red ribbon and wears similarly colored stockings.