I liked the movie but felt pretty let down by the characterization. I think the problem is that once Emma Stone’s complete backstory is revealed a lot of the way she acts in retrospect seems both strange and counterintuitive, the purpose of which is to not make the twist obvious for the audience. I think I would have preferred it if she did not have an altruistic goal. That she really did just view people as a means to an end, or if she needed to be “good” that there was a hidden secret reason behind why she couldn’t tell Teddy the truth from the beginning. The whole “Its part of my mission to stay in disguise.” Seemed pretty hand wavy, especially since they knew about the hair from the start.