Oh wow, I'm afraid no bells are ringing. :-[
A shot in the dark however... Rose Knight? ???
(Sorry for being terrible!)
EDIT: And now that I've seen your post in the "Defiant Roll Call" topic, I'm rather embarrassed and can only apologize once more for being terrible :( - I even tried cheating by flipping through all my screenshots from back then, which I on second flip-through saw I had done too quickly, as I had overlooked your name in some screenshots taken during a few Arena matches. I think the "guess who this is" wording threw me off, thinking you used to play with a different name :P.