Imperial Physician Li is a physician in the Imperial Hospital who accompanies the emperor to the princess's mansion. He is initially clumsy, nearly falling when kicked by the emperor. He examines Madam Zhou and the princess, discovering that the princess was poisoned during childbirth with a vicious medicine that damaged her root, leading to a shortened lifespan. He also later investigates the beauty cream incident involving the Imperial Noble Consort. He is competent but cautious, careful not to offend the emperor.
