User blog comment:Morganaforever/Are Arthur and Morgana siblings after all?/@comment-5036924-20120105204905/@comment-4650675-20120105225415

You're right, Arthur does have many traits of Uther, like quick temper, as you said, and always makes decisions on impulse, whereas Morgana is a more calm and calculative person and always aims to make the right move. I can't say that Morgana and Arthur have many similarities and that's why they were making a good couple in season 1, the one's strength was the other's weakness. Being so different (both on appearance and personality) it's not easy for one to accept they share the same father. I don't think that the writers will ever reveal under exactly what conditions Arthur was born, since it has to do with sexual contact and it is avoided strictly in the show, but I still found this theory interesting! Not that I believe something like that's gonna happen anyway.