The whole two-colour thing actually kinda appeals to me.
Reminded me of a book series I read ages ago, Death Gate Cycle by Weiss and Hickman. One of the uberpowerful races in the series(the Sartan) have white hair that has dark tips. Kinda feel like going back to re-read them now.
I knew a woman who intentionally kept her hair with half the length a different colour than the rest. Like Dora it wasn't just her roots showing kind of thing, she had a good 15 cm/6 inches of her natural reddish colour and then another chunk that gradually faded to a blonde. Took a while to get used to, but it was kinda hot once I did. Don't worry Jeph, not lusting after Dora now or ever
I expect she'll end up cutting off the black bits once the blonde gets long enough, but Dora's kinda odd, she might actually decide she likes it.