Since no one has replied, I will make a first post. For appearances, why not give her a black coat, blue eyes and pink hair? The cutie mark would suit better with those colors. The different highlights and white doesn't match well. Just a suggestion. I think it would look prettier. And maybe she could have long flat hair with curled ends? Same with the tail. It would be a little fluttershy-esque, but hopefully not too much!