This is Guiltys older blood sister Crystal Crown, shes very protective of her little brother with their father being sick in bed she had to keep an eye on him. Crystal's talent is making beautiful jewelry that changes with your emotions, so all in all Crystal Crown made Crystals into mood changing jewelry.
Crystal is a sweet mare who thinks more of people then herself but she not just like that, she doesn't speak unless spoken to so making friends isn't much of her forte, she can only talk to her family really, shes shy around others until she gets to know them, but if anyone trys or seems like their making a move on her little brother Guilty, oh shes a whole different mare.