Me and my indecision

When I looked her over a few, I soon realized she looked waaay too similar to my Ate's original character, Koyoto, who has long blue hair tied into a pony tail, so I freaked out and decided to change her hair but... I couldn't decide...
Uhm. Help please? ^_^;;

Thank you all in advanced.~

to be scrapped later
EDIT: arrgh! you can't see the colors well! >_<;
I tried coloring it in pink, green, purple, yellow, and orange. I was thinking of going for green, though...