A hospitable and cheerful young lady of the Pei family who hosted the banquet at Luoxue Pavilion. She gave Pei Jingheng's puzzle box as her coming-of-age gift. She warmly befriended Shen Yunshuang after the latter solved the box, showing genuine affection and gratitude. She is the eldest cousin among the Pei cousins' generation and is the younger sister of Pei Jingheng and Pei Jingnian.
