The little sister of Gu Wangqing, lively and outspoken. She introduced herself and her sister to Gu Qingyan when he first asked their names. She explained that their beautiful names were given by their father Gu Tongsheng who was a student. She was quick to scold Gu Wangqing for worrying about Gu Fengmian. She was shy around Gu Qingyan at first but grew more comfortable. She and her sister were starving, surviving on sweet potato rice. She eagerly tried the Osmanthus cakes and couldn't help but have multiple pieces despite knowing they shouldn't take so much.