Gu Ruo's half-sister, born to concubine Madam Ding. She appeared innocent and kind, caring for Gu Ruo's injury by applying medicine daily. However, she secretly added Netherworld Grass to the ointment and fed Gu Ruo Nine Yang Cake made from Nine Yang Flower. The combination produced a toxin that harms the nervous system. She was confident no physician could detect the poison and tried to destroy evidence.
