Have seen Lancelot suggested on another forum too, and think that idea fits really well. As far as heroic and tragic legends about knights go, he’s the man. Arthur’s #1 knight who had an affair with Guinevere that brought about the downfall of the kingdom. Seems to fit the story of the casting call pretty well.
I was thinking the same thing. I wonder if Anastaisa is Guinevere and Dr. Whale is tied in somehow. I have been theorizing that Dr. Whale is part of the King Arthur Tale. I am most convinced he is tied in with the new princess.