Here's my crackpot theory, but what if Rey is, the force. Alright hear me out. So with the Knights of Ren killing all of Luke's students, and with Smoke out and about, there was a grave unbalance,just like when Anakin was born, there was an unbalance of light over dark. So I think that perhaps the force itself created Rey to rebalance the force, just like Anakin, and that's why she has such an amazing affinity to the force. Obviously the unbalance is dark over light with Rey, so she is an embodiement of good, just as Anakin became the embodiement of evil. Other things hinting towards this would be the fact that Rey's theme meshes almost perfectly with the original force theme, like they're a duet. Also,at the final seconds of the end credit song for The Force Awakens, you can hear Rey's theme and the Force theme played together for only afew seconds. So, what do you think? This theory pleases me and solves the peoblems I have with Rey for now, so I'll stick with it.