Also known as Xiao Jingru or Princess Jingru, she is Gu Yan and Gu Jingyu's younger sister, approximately three years old. She was born after Gu Yan left Chang'an and has been plagued by minor illnesses since birth. She is spoiled by her parents and prone to tantrums. She was rude to Nuonuo, calling her silly when Nuonuo could not properly respond. Despite her behavior, Princess Shengzhao told Yun Xiangye she may discipline Jingru if she continues to be unreasonable.
