Black haired girl = as basic as an unpopular japanese school girl who likes books can be, if she suddenly turned beautiful, even more basic.
Princess = bitch, if the black haired girl wasn't as emotionally fragile as people her age and like her should be, she would've been hurt 10 times over by princess and secretly harbor massive resentment for her. Can't pass off this princess' words as if they have no meaning to the ones she says them to. If the writing was more polished and way less carefree and "cute" her bullying victims would've gotten depression because of the princess' henchmen and the girl herself.