The original Princess Changyu, whom Pei Tingche has known for sixteen years. She is the person Ning Wanguan appears to resemble. The original Changyu had a completely different temperament, personality, way of speaking, attitude, and behavior compared to the current girl. Pei Tingche personally strangled her to death in a dungeon a year ago, but she later appeared alive again, leading him to suspect the current girl is not the original Changyu.
