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Idol, student (briefly)
February 8th (♒)
Yaten is a 10th grade student at Juuban Municipal High School, and is the most artistic among the group. She likes photography, but she can also be annoying, since she snatches Usagi's letter to Mamoru and makes fun of her spelling. She does not belong to any club, and prefers to go home.
She does not interact much with people around her. According to Takeuchi, she is a jerk and egotist. She has never carried anything heavier than chopsticks and the most unpleasant thing she can face is injuring her face or body. She is very delicate, nervous and always holds grudges.
Yaten has long white hair tied into a low ponytail. She has gray eyes and wears emerald earrings. As a member of the Three Lights, she wears a blue shirt with a red tie, and a light blue coat with a yellow rose, and light blue pants.
The name "Yaten Kou" means "night sky light" (ya ten kou). In the Mixx manga, her name was changed to Yaten Lights, implying to the Three Lights.
- According to the Materials Collection, she boasts a weight of 38 kg, and if she doesn't sleep for 13 hours a day, her body will be unable to hold up.