Hi! I'm late, but I have Katie, Meghan, Callen and Ron.
Meghan = former housemate. They would have been on the team together and just two years apart. Friends?
Katie = a year behind her and also plays for Puddlemere. I think they'd get along well.
Ron = probably remembers her vaguely from school. Would be friendly.
Callen = a year ahead of her, rival chaser. Would be... Callen. LOL. Which is to say not unfriendly, but not really going out of his way to be friends, either, probably.