Daughter of Granny Qian, she joined Xu Rong's retinue just before the wedding. Xu Rong selected her to make up an even number of maids. Xin Cheng was initially shocked by Xu Rong's bold request to get food from the in-laws' kitchen but followed her mother's advice to not question anything and just obey. She faced cold shoulders from the kitchen staff who made her wait for approvals.