She was just.. there. I assumed she was magic due to not leaving footprints in the snow and asked for help finding keywords on the subject.

She revealed who she was and explained that we're currently part of some sort of diverged timeline. No.. Maybe that's not the right word. Hmm... Where we are now, exists outside of the time we came from.

No one even knows we're gone.

[And this seems to be a great source of relief to him. He still really wants to go home, since he isn't very good ad functioning without Shotaro, but at least he no longer has to worry about Shotaro functioning without him.]