Transmigrating into The Founder of Diabolism as Ye Qianxi

Ye Qianxi had a difficult life in her previous life.

She thought she was an orphan, only to discover that her parents had abandoned her because they favored boys. She thought her adoptive parents treated her well, but after they had a child of their own, they kicked her out. Later, through a twist of fate, she became a mercenary, crawling out of piles of corpses and dancing on the edge of a blade, cruel and cold-blooded. Yet she unexpectedly fell in love with Grandmaster of Demonic Cultivation, savoring every word of the book over and over and listening to every fan song again and again. After she transmigrates, what kind of spectacular story will she write?

The heroine is strong; the canon couples stay together. The author is a student and updates irregularly. Please don't flame if it's not to your taste.