Haha, I'm glad you enjoyed the story. It's definitely written to have a few more loose ends than usual at the wrapup, but, I can at least say you're always playing from the same character's perspective. As to to the identity of the other character who seems to occupy that perspective, they make a statement -- "I believe our identities are determined by our experiences."
...which I get I get is not an answer, but part of the exercise of the game is to pose the question that if that person /does/ now have your memory/experience, and everyone else acknowledges that -- does that make them you?