If Ashley bleached her hair, why was her hair white when she was a three-year-old? If her hair is naturally white, why are her eyebrows black? Is this explained in Another Code R?
It could be that she has some sort of albinism... But it's more likely that she's just really, really pale blonde. As for her eyebrows being dark, I think that's just to make sure people can see them; you know, visual cues and all that.