Just updated the post. Check it out.

Got it, it is highly theorized that she is from the future, hence her rifle having parts that shouldn't exist yet. Also makes sense when you take into account that she slips in and out like a Vex (who she was hunting) and got their technology. She probably seen a lot of things, her and her group (whom ever she is talking to). Her story is the most interesting to me.

Yeah that's the one thing I can't figure out, and a big glaring factor in my idea. Who was she talking to when we first met. Are there others out there like the traveler, or the Exo stranger just isn't the traveler.