Mei is Youhei Sunohara's younger sister, who lives in the countryside. She is worried about her brother, and comes to visit a few times.
In the game, she looks up to her older brother, and works hard to try to get Youhei Sunohara reinstated in the soccer team, but fails. When the soccer team mocks her for her failure, she starts crying and calling out for him and he winds up coming to her rescue. Both Tomoya Okazaki and Youhei Sunohara do a beat-down on the soccer team and wind up losing in the fight, but winning Mei's admiration.