The female lead of the novel and the eldest sister of Yan Yuning. She grew up by their mother's side at the Prime Minister's residence and is described as the story's heroine. She rescued the unconscious Xuan Yanyu during an excursion out of pity and brought him back to the Prime Minister's residence. She is destined for the male lead Qi Qingchen. When Xuan Yanyu learned she was to marry him, he invaded Qilan Kingdom. She refused to marry Xuan Yanyu, which led to her family being threatened. After Yan Yuning's death, she dared not refuse Xuan Yanyu anymore. She is called Ah Yao by Xuan Yanyu and Brother Yu is how she refers to him. She is described as gentle and loving toward her sister, having summoned Yan Yuning back saying she missed her.
