I don't know either. She's so lovely with dark hair. Don't laugh but for awhile I thought she was trying to emulate her mother's appearance by coloring it so it looked more like QAlia's. Sounds simplistic, I know, but she clearly idolizes her mother (a natural instinct, I think) and possibly wanted to look even more like her than she does. That's the only explanation I can come up with, at any rate. So, while I don't understand it because it did make her hair look fried, I possibly can understand the thought/motivation behind it.