Those Years I Played My Own Body Double

Question: How should I act so people think I seem like myself, without suspecting that I actually am myself? In one sentence: How do I convincingly play my own double? After turning the cultivation world into a complete mess, Feng Xiao, the troublemaking demoness of the demon realm, transmigrates three hundred years into the future, into the body of a girl with little spiritual power. Looking at the familiar face in the mirror and thinking of the enemies who would line up all the way from Demon City to Jingcang Mountain, Feng Xiao decides to keep a low profile and quietly build up her strength. She'll increase her cultivation first and cause trouble later. She never expected the defeated enemies from her past to find her. "From now on, you'll be called Feng Xiaoxiao. Your mission is to study Feng Xiao, become her double, and seduce Venerable Wu Si." Feng Xiao: ???? Seduce Venerable Wu Si? Have they lost their minds? Venerable Wu Si was her greatest enemy back then, and he hated her guts. He once traveled a thousand miles just to hunt her down!!! If she wants to seduce Wu Si, she'd have a better chance dressed as a dog than pretending to be Feng Xiao. But the facts prove Feng Xiao wrong. She gets face-slapped. Venerable Wu Si: I've been waiting for you. And why are all those defeated enemies of hers acting like this... Feng Xiao: Get a grip. We're enemies! Feng Xiao: I know I used to be awful. I messed with a lot of people, and I feel really guilty about it. Now I've decided to turn over a new leaf and mess with you all again. Hahahahaha! Come and get me if you dare! Everyone else: ... In a nutshell: The demoness of the demon realm puts on a new secret identity and tries to play herself. Everyone thinks she's a double, but in truth she's herself. She returns to the cultivation world to stir up trouble again, driving cultivators and demonic cultivators alike wild. Theme: Everyone should strive to stand on their own.