Most likely not. But we'll find out for sure soon. Colin Morgan said in an interview, in Series 5 Merlin is shocked by Aithusa choosing Morgana. You can bet Kilgharrah will be too! Let's just see what happened! Aithusa saved Morgana as there is no good or bad in magic- it's just how you use it. Aithusa chose the Morgana way of doing things. Oops!