Hey there! I'm extremely entertained by the fact that your PB's brother in Vampire Diaries almost has the same name as your char. Wait, is thisd be too much coffee talking...:P
However, this is Vickie Dillon, seventh year Slytherin, who is in most of Damiens classes! She is the Prankster of the school, and rather wild, even if she takes her studies seriously. She probably respects Damien's academic accomplishments and is more than ready to help him find any small ways to rebel. Heck, she'd probably offer herself as a way to rebel, because she thinks he is so handsome! (Did I mention she has a weak spot for quidditch boys?)