I don't mind her going back to her chocolate skin in the manga but the point of her skin color turning dark to pale was to show the readers how shallow humans can be when it comes to prejudice of physical appearance based on their history and culture. Her having a dark spirit and dark skin was evil to them, and now that many witnessed her new blessing from the light spirit and the expulsion of the dark skin, many people who used to treat her like trash suddenly do a disgusting 180 and try to turn on her good side and it's good she doesn't go "Oh, many people like me now, I'm so happy." it's still " These people are shallow and disgusting and I don't want their forgiveness. "
Kind of like how the people in this manga's comments every chapter are so sensitive about her skin turning from dark to pale because apparently they're also shallow enough not to realize that her skin turning from dark to pale is somehow some far-fetched stupid conspiracy theory about racism but whatever, I'm just another racist Asian apparently. In one ear and out the other just like the people who discriminated against Claudia.