I'm guessing you're asking about the novel Coincidentally Encounter with the Misty Immortal. The main character is a girl named Misty. Although she's the main character in a Xianxia novel, she has nothing to do with Long Aotian. The story told that Piao Miao was the disciple of Shangxian Huaijin. She wandered the human world in layers of elaborate schemes. She had the favor of Shangxian, the protection of the Demon Lord, the confidant of the right and the heart of the right. How lucky she was. I hope you like this fairy's recommendation. Muah ~😗