User blog comment:AgnesFlether/A lesson in vengeance: Agnes' Fletcher thoughts/@comment-5086871-20121118111059

The main reason it is not just Arthur and Gwen is because he is the KING OF CAMELOT!

If anything happens to him, Camelot will be in grave danger. He needed someone else with him there. It should have been a knight or 2 but they just wanted Merlin to have more screen time.