You Mei is Zhou Bai's roommate and close friend at Jiang University. She is observant, caring, and somewhat playful, often teasing Zhou Bai about her campus belle status. She notices the hickey on Zhou Bai's neck and expresses concern about her friend's well-being. You Mei is loyal and supportive, sharing dorm life with Zhou Bai while other roommates have moved out. She is also enthusiastic about academic matters, such as the research project, and is excited by the arrival of the new handsome professor. Her interactions with Zhou Bai highlight themes of friendship and female solidarity in a university setting.
