Funny you said that because I totally can see Rory in the space suit now!
This is what I mean! It could be ANYONE, because EVERYONE mirrors EVERYONE ELSE. /o\ I'm used to following the metaphors in order to figure out the plot, but they're all so tangled that... *waves hands around helplessly*

You are absolutely right that Rory is mirrored through out (and even calls the Doctor on it). The boy who was always a stand-in, right from the beginning.

So yeah, I don't have a clue.