Are these good models?

i am writing a story. My main character is a seventeen year old orphan girl named Wynter Opal Woodring. She is a scene type girl who rides horses. Her two horses end up turning into a unicorn and a pegasus and she learns about the magical horse world. I chose Brittany Kramer and Brookelle Bones (they look very alike, but I mostly used Brittany) as the models for Wynter. Her committed boyfriend, Ashton (Ash) Phoenix Moore, is eighteen and he is emancipated and his parents abandoned him when he was 15. He took Wynter in when her parents died and they lived together. (Both left high school when their parents were gone). I'm using Alex Evans as the model for Ash. I haven't gotten too far in the book yet but I was wondering if these are good model choices for the main characters.