Hey.. people change... R=U assumes Rinia lost her memory, so it's really not that much fo an assumption to assume she can have a 'K' instead of a C. And I gave my reasons for my support of R=U before. Everything that is in FF VIII was put inthere for a reason, and when someone in Rinoa's position says 'I wish time would stand still' in a game where the villain wants to compress time, AND there's a lot of talk about 'sorceresses can go bad without a Knight', plus the other stuff... I have the feeling SS wants to tell us something.

But, back to the subject, I would think the painting could indeed refer to Diablus, but it could also be Rinoa. The Greek word for Messenger is Angellos (as Angels are supposed to be God's Messenger) Hence Diablos IS a Dark Messenger, a Dark/Fallen Angel, thus a devil. Rinoa also has angel wings though, and at a certain time, she sleeps in Garden as well.

Does it mean anything else? Not as far as I can see. Don't think it has anything to do with the R=U theory myself.