Yukina is a fairly young girl from Sairen who is allergic to boys just like Yukinari is allergic to girls.Yukina also has a star mark but she also has star marks all over her entire body.
In the end of the series Yukina steals Miharu from Earth because she is jealous of Yukinari and Miharu's relationship.
Also she comes back to Earth with Yukinari and falls in love with him.
