****!
Just had a thought- shes the one who destroys the temple.... as a child.
Snoke finds out about this and sends kylo to kidnap her. (as shown in the Flashback in TFA)
Someone realises that she is a danger to everything a dumps her on Jakku far away from everything.
Shes like that child in the Akira cartoon.
Everyone thinks that Kylo destroyed the Jedi Temple, but if you think about it, there has been no evidence it was him.
When Luke says that he has seen this raw power before....its her as a child.