I like how you guys think. Perhaps I will have her as a young won, aged just as much as the others, and look more human than elf. I would like to use the first image as a reference, since I hope to have her look more like her elven brethren later in the game. Human riders often take of elvish aspects right? So it would be kind of like that, mingling and enhancing her own elvish blood right?
I was also thinking that her father, as a human, had been the one to raise her. A war veteran, who settled down as a scholar who often told stories and taught the human children of the village. He would work as a livestock farmer and butcher mostly, trading his meat for vegetables. His daughter would know how to ride, and what to feed, but he would have shown her little other than the basics of swordplay. Thus she may be slightly ahead of the others, but still, as said, with little practice against shadows and dummies.
How does something like that sound to you guys?