User blog comment:SATOSHISUMI/Mystery Woman/@comment-112.205.30.63-20120925100501

I really think it is Layla. Here are my arguments:

1.) Her "death" was really suspicious and it happened at 777 (the magical year). Plus, Jude Heartfilia never really explained why he was cold to Lucy after the death of Layla except for the fact that he might have been hurt too much of losing Layla. But it's also possible that he wanted Lucy to stay away from Magic since he knows what really happened with Layla.

2.) She was crying while watching the GMG. But then, if she was future Lucy or someone who is from the future, she could have stopped everything as early as now (but that wouldn't be fun, would it?). Remember how the dragons were actually the strongest creatures in the world before they disappeared. I think that the festival of the dragon king is nothing really special but just the GMG of the past where the dragons (the strongest creatures) are fighting to see who the strongest is. Well since they are all gone, the Festival was changed to GMG which is a tournament between the strongest mages (strongest creatures now). Now relating with the girl, she must be crying because the events are happening again with Lucy as the center (same with her before during x777) and the eclipse plan must need a lot of magical power to actually work. Remember, Levi's entry about '.... died    .... died      and my dear....' Well, the dragon probably experienced the same thing.

3.) Another is remember Levi's diary entries? It seems that she was talking to Lucy as if she disappeared. I think she only disappeared and not dead because, her entries were like made so that if ever Lucy comes back, she'll recall whatever happened during that time. I know it may sound cliched (Lisanna event) but it's possible that Layla disappeared during x777 and she just came back now. Probably what will happen to Lucy if she does the eclipse plan.

4.) During the Tenrou Island Arc, Lucy mentioned that Layla actually taught her what the One Magic could possibly be. (It's love! according to Lucy) The One magic is the magic Hades/Purehito is actually associating with Zeref so it's possible that before she "died", she actually was able to find out what this One Magic really is which kind of explains why she has the same magical aura as Zeref. Not sure though, but it could also be the reason why she doesn't have a right hand.

Sorry for the long post. :)