[Comprehensive Wuxia] The Little Poison Master

She apprenticed under Western Venom, mastered an arsenal of poisons, and killed without batting an eye. Zheng Nan'er was the very picture of a villain. Until she transmigrated. She had somehow become the white moonlight in everyone else's heart: upright, kind, and all talk with no follow-through. The righteous faction thought she was lonely, miserable, and burdened by a tragic past, so they tried to warm her heart and reform her. The villains thought she was too righteous and merely holding back, so they kept trying to corrupt her. Zheng Nan'er: I don't need to fall into depravity anymore. P.S. A native-born heroine who grows over time, expressionless and emotionally detached. The plot is Mary Sue-style. Also known as "How I, the Villain's Standard Issue, Became the White Moonlight." Theme: Through interacting with others, she gradually learns what is good and true.