I Was Supposed to Be a Fake Heroine, So How Did I Become a Fierce Powerhouse?

1v1 bickering enemies-to-lovers, a love-struck male lead, and a genius female lead [Quirky, cunning genius junior sister vs. sharp-tongued, arrogant, devilishly talented saber-wielding senior brother] Most people cultivate immortality to grow stronger. Ji Fuli cultivates immortality so she can beat up her senior brother. As the fake heroine in a pampered junior sister story, she tears up the script from the start. Instead of joining the leader of the righteous sects, she chooses to study under the villainous Sword Venerable, becoming the beloved senior sister of the Sword Pavilion. A fearless sword cultivator of the Heartless Path, she is cunning and ruthless. Anyone who crosses her is in for trouble. At first, Wei Yu is proud and arrogant, bickering with her every day. Even when she beats him up, he refuses to back down: “Ji Fuli, I dare you to slash me again!” Ji Fuli curls her lips into a smile, knocks his saber away with a flick, and holds her sword to his throat. “I did. So what?” He sticks out his neck. “That was a sneak attack!” But before long, the sharp-tongued senior brother is completely smitten. The more she beats him, the more he loves it. He brings his repaired saber over to her and says, “Junior sister only beats me up. That proves she has a thing for me!” Ji Fuli shoots him a sidelong glance. “Follow me again and I’ll turn your saber into scrap metal.” Wei Yu offers her the saber, eyes shining. “Go ahead, junior sister. If it breaks, I’ll forge another one!” The real heroine, Shen Youyou, is reborn and steals opportunities meant for others. She puts on a false show of concern and advises Ji Fuli, “This is fate. You should pave the way for me.” Ji Fuli tears up the script and holds her sword to Shen Youyou’s throat. “Dream on.” She claims the legacy of the ancient Sword Tomb first and even lures away Shen Youyou’s bonded divine pet. Every time Shen Youyou tries to catch up, she finds herself still stuck in the mud, while Ji Fuli is already soaring above the clouds. Shen Youyou fumes. “I’m the real heroine!” Ji Fuli raises an eyebrow. “Don’t make your big sister Li laugh. What are you, anyway?” Wei Yu rubs his swollen face and comes over with the lovestruck look of a puppy. “Junior sister insulted me. She really does love me! I’m going to be her dog.”