One of the female protagonists of the story, Ayu constantly tries to stay calm and keep her cool about everything. This is quite a facade for her to keep up, because the only reason she wants to be "cool" is because Tetsushi Kaji (her crush-later on her boyfriend-, and the star of the school baseball team) told her once that he liked how cool she was about everything. (He said this because when given a pop quiz she was the only one in the class who didn't freak out but she was actually just tired.) However, after she met Nina, she was everything but cool and calm. She is the president of the girl's tennis club and one of the most popular girls in the school, and she works hard on keeping up her "cool, calm and collected" reputation.
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