I love changing her hair so much that I’m even finding ways to make it canon.
You can see her hair from the very beginning up top - her ‘proper lady’ updo. After talking with Fergus, I switched it to the curly down version (no one sleeps with than many pins in the back of their head). It made her look lovely and somewhat disheveled for the fight against Howe’s men. Then, right before the Battle at Ostagar, she chops it all off with one of her daggers which you can see @ the bottom.
I might grow it back out later. I head canon that she doesn’t know how to do anything with it, as she’s always had her mothers maids/servants to do it for her. Left to her own devices, she’s all tangles and snarls.