Really makes one wonder just how things unravel to the point that he (or someone else) ends up changing the past to save her, and how far that event is in his future. And, unless I'm not thinking things through enough, if he did time travel to save her, it was in the timeline two splits prior, so he originally got to the point where he's changing time in a timeline that she was dead, which makes you wonder what the events were in that timeline that made him suddenly decide to save that specific life, since it can probably be assumed he didn't do it as a response to the murder itself, but rather something else further down the line. Not to mention, by doing so, he ran the risk that never discovered how to change time in the new timeline. Or any of a gazillion other repercussions.
I mean, having the girl buy a lottery ticket somehow resulted in the store having Diet Pepper in stock. I'm not even going to try to theorize what changes occurred when Kurisu was saved, especially since we never really get to see what that original timeline was like since it was changed so early in the series.
Trying so hard not to ruin this by looking up the game synopsis. :/
And yea, part-time girl has to be a time traveler, and from one messed up future it seems where people are brainwashed with chips in their eyes?
For now, one wonders if she's one of possibly many accomplices of John Titor, all working to slowly change their future? I get total Terminator protecting John Connor vibes from her.
I can't recall if her suggestion for him to talk to Titor was supposed to be innocent in that he's talked about Titor to her a lot or suggestive that she knows about Titor on her own - hard to keep everything in my head; there's just so much!