Actually, the truth is I don't really know how to finish it. @.@ I'll gladly accept suggestions though!! It still looks like this in my hard drive lol. Maybe I'll try a sky bg, although I'm not the best background artist xD
Hmmm. I think the sky idea would turn out interesting especially if you desaturated the colors a lot to contrast with the hair a bit. As for the character herself maybe just leave her as she is now, perhaps add a touch of red (like on her lips or eyes) to go along with her hair, but I like it as is right now. Good luck finished this though.