A fair-skinned 16-17-year-old girl with two braids, wearing a fashionable Peter Pan dress, black leather shoes, and a pearl headband. She is Su Nuannuan’s deskmate and best friend, generous and simple-minded. Yu Weiwei often shares her meals with Su Nuannuan, including braised pork and scrambled eggs. She is easily impressed and calls Su Nuannuan her close little sister. During the college entrance exam, she treats Su Nuannuan to lunch and receives large meat buns in return. Her carefree and kind nature makes her a loyal companion.