Wu Yue

Identical twin sister of Shi Yun. Was tortured and thrown into a mass grave by Shi Yun and then was saved by Nan Xiao of the Medicine Order.

Her gifts had always been more powerful than Shi Yun. Later on, when Shi Yun accidentally received/discovered a book containing secrets on absorbing the mental capacity of others in order to cultivate, she absorbed Wu Yue spiritual force which ended up increasing her own powers. Shi Yun did not like having somebody who looked exactly like her and believed that only her looks alone deserve to be considered as the number one under the heavens. So she destroyed Wu Yue face and imprisoned her in a dungeon, telling the rest of the world that she had died. Every day she would come and torture her. In the end, Wu Yue feigned her own death in order to escape. She was then thrown into an unmarked grave. Fortunately, Nan Xiao happened to pass by and saved her.

Trivia

 * It was Nan Xiao who gave her the name of Wu Yue