But if she's Luke's child that opens up interesting questions in regards to her mother. She's not accounted for, which first led me to suspect that she could have been one of the Jedi in Luke's new order and was killed along with the others. This would really give Luke's reclusion afterward a lot more personal weight. Looking back now that doesn't seem likely, since I think Rey was holding a woman's hand when she watched Luke's ship leave; she was still alive when Luke left. That leaves a lot of questions about where she's gone.
If she's a Kenobi, then there's plot trouble right away. She obviously couldn't be Ben's daughter, and in order for her parents to be old enough to conceive her after Return of the Jedi they would have had to have been born shortly after Obi Wan hermited himself away in Revenge of the Sith. What are the odds he would find someone on a remote desert scumhole so quickly? When he was supposed to be resigning himself to staying hidden and watching over Luke?
Ben's described and shown as nothing but a hermit who lives in isolation- there's no trace of any children or partners having been around for years. This means for whatever reason he would have abandoned his family well before A New Hope took place with no reasonable explanation.
It also doesn't make sense in any way for Rey to have been abandoned by her parents when Luke went into hiding, or why she had such a connection with Luke that she would suffer abandonment issues after his departure. The only non-paternal relationship I can think of is that Luke was training her as her master, but again, this doesn't explain why her parents left her.
She's obviously Luke's daughter. She even looks like a combination of Mark Hammil and Natalie Portman.
