which FL? if you're talking about the FL in the novel in the webtoon, she's blonde. Someone casted a magic on her to turn her hair into brunette so she wouldn't be recognized. I think it's aroun chapter 32 when it was explained hehehe
You probably forgot but Charlotte got caught by the other noble ladies and had her hair changed to brunette so she won't get recognized and sold her off as a slave
Im confused? FL is blond or brunette? And howd she became slave when she not long ago dances with prince? Or are they different people?