Okay, I’ve finally formed an opinion on this widely discussed mystery. And it’s super legit. Ready? Here it is:
Rey is a damn spy for the new emperor 
.
You know, how she lied about not knowing who Luke is despite the doll and the pilot helmet. How she apparently went from ‘the force is a myth’ to mastering the force & lightsaber in like a tenth of the time that Luke did. How she so conveniently had to come back to that bridge to see Han die - obviously so if Kylo failed to kill him she would have assassinated Han herself. Clearly Rey is a Sith Lord who was secretly trained by hologram Voldemort himself mwahaha .
Anyway you slice it, there’s something iffy and uncommon about that young lady, cause yeah she did also have numerous conversations with both Chewie and BB-8.