Alright, let's break this down because 'I Became the Ugly Lady' has a plot that goes hard on the redemption arc. The initial setup is classic: a modern woman transmigrates into the body of a noble girl universally despised for her looks and terrible personality. The key turning point is when she decides to stop chasing the crown prince who despises her and literally washes off the thick makeup. This reveals she was never ugly at all—the original lady was using makeup to hide her stunning beauty due to some family-related trauma or a promise to her mother.
From there, it's a power fantasy in the best way. She masters magic or swordsmanship at an insane speed, shocking everyone who mocked her. She catches the eye of the male lead, often a powerful duke or magician more formidable than the prince. The spoiled sister and the prince's sidepiece, who orchestrated much of the bullying, get their spectacular comeuppance. The story usually culminates in a very public scene where her true identity and power are revealed, humiliating her former detractors and securing her position with the new love interest. I live for the moment the prince realizes what he lost, but honestly, by that point the protagonist is so far beyond him it's not even a satisfying revenge—it's just her new normal.