Chapter 22 - "Our Doubts Are Traitors" - Part 1

[zombiederek]

That may be true, but Pippin already knows Kelly's name. Wouldn't he be like, "No, Kelly!" and so on?

I agree with this he would have shouted out her name if she were getting ready to shoot him. I'm putting my money on Richard (is that his name? The one who didn't want to watch him in the first place?) It would be a brilliant move by the writers because it makes sense and it doesn't cost any of the characters that we have come to love any respect or integrity by being a traitor. It also makes the most sense in the story, he creates a big stir by getting Lizzy kicked out, therefore dividing the best fighters in the tower, then he refuses to watch over Pippin, who would instantly recognize him for who he is. By being able to go somewhere else, he is able to set himself up to sneak back to the monitor area and pull the trigger. I also believe that he knew full well that Hope would be the one who would replace Kelly, making his deception all the more easy to accomplish.