Board Thread:Fan Fiction/@comment-5847295-20121211110816/@comment-26952674-20150902171735

Ok I understand that Merlin was motivated by many things, so it would seem that he would be in the other houses. But what J.K. Rowling put on Pottermore about him being a Slytherin would be ultimately true. See Slytherins are sorted into their house because of one gigantic aspect: they have the ambition to get what they want however they see fit. Merlins whole deal was to save Arthur. He didn't care how he did it, just that he did. That is why Merlin is sorted into the Slytherin house.