Hiya! I have my boy, Ben, who is a 7th year Gryffindor. He's a jokester himself, so I don't know if they would be friends or enemies since she can't really take a joke. However I can't really see them being enemies because Ben only really hates stupid pureblood elitist assholes. Everyone else he doesn't really have problems with, though she might not like him for some reason or another. :p

Then I also have Skyla Davenport, 6th year Slytherin, but she'd probably hate Colleen because Skyla just hates everyone. lol. Hit me up on AIM/YM thursdaychild121 if you have any ideas. PMing always works, as well.