Bai Yuheng's true identity as an emperor of Tianyan Sect. She sealed the demons with her own body a hundred years ago, fusing her soul with the Four Directions Mirror. Before her sacrifice, she told her disciple Pei Yuan to wait for her on Mount Wangxian. She had a luan bird as her mount. Her mortal name before ascension was Bai Yuheng, sharing the character Heng with Chang'e.
