I thought it might be her. She was too ditzy, after everything she went through you would think she could protect herself better. It seems she has learned how to act, but I wonder what she is a 'traitor' for? It was the glasses guy who brought them all to the Tomodachi game, it was Shibe who had a debt so large that they had to play the adult game, so what exactly did she do to make her a 'traitor'? Even if she's behind the whole Tomodachi game it still wasn't her that brought them in.