Xiao Nianyao, also known as Third Madam Lu, is the female protagonist married to Lu Fengxing. She resides at Biyun Pavilion and is the granddaughter of the Princess Royal. Nianyao is intelligent, observant, and courageous. She demonstrates quick thinking when she secretly gives Lu Ningle a piece of walnut pastry during the princesses' confrontation, triggering Ningle's known allergy and providing a legitimate excuse to avoid choosing between the Third and Fifth Princesses. She is perceptive about political dynamics, correctly suspecting the Ningyuan Marquis's household is being used as a front by the Second Prince's consort. She maintains composure when questioned by the consort about a Daoist visitor, subtly leveraging her grandmother's connection as a diplomatic shield.