Astarion's evil magistrate past would enrich this character so much. Ex abuser combined with victim is a fascinating topic. Being just a victim is a bit boring narrative choice in my opinion.
That would be hard cause he also states that his hair turned white. So it's more then likely he also had a different hair color.
No, he doesn't. He only says he doesn't remember his face since it's grew fangs and his eyes turned red. Nothing about hair. It's a headcanon from tumblr that he had different hair color.
