Or, perhaps, she could go the tribal path she seems to be going down already- I really like what you did with her eyes and the forehead patch, it'd be a shame to get rid of that. Perhaps plum blossoms for another pony?
Ooh, I really like the darker-colored wings idea. If it's possible, you could taint the wingspurple to reflect the purple lashes and pupil. A variation of the tribal design on her forhead could be repeated for her sysmbol. Sort of how Kasuri was suggesting (I think that's what she was saying)