A fifteen-year-old girl, the youngest daughter of the Cui family's third branch. She is described as lively, charming, and beautiful, with twin side buns and a peach-pink dress. She often pens letters sent to the Duke's residence. She is adored by the household and spends the most time with her grandmother since her elder sisters are all married. She takes Xu Shuyao out to see the sights and is frank and cheerful.