I second what Kate said. We'll help you along, never fear. And if you have any questions, don't be afraid to ask.
Rowan is a little dim, but is incredibly friendly, so if she met Snow it is very likely she would be a bit bubbly and sweet.
Charles would feel bad because of what she had to go through. Gossip travels fast in royal circles. He would be as supportive as he can of Snow and her hubby.
Gin... would try to steal from her. Maybe wink and give her a fake name while he fishes for something valuable. He's pretty and he knows it and uses it to his advantage.