You've been here, again and again before. He's been here too, every time. So has Frisk, and Chara. So has everyone else. The real Sans had already moved on to another time line. You weren't able to make the jump. You were stuck in your last moments, forever.
You are a lone girl with a normal and boring life... You worked at a convinient store just a few blocks away from your not so great House. You were a rather stoic person who didn't care much about the world. You were also a caffeine addict which wasn't so healthy, but you didn't care either way. Anyway, 3-4 years ago...
So this is where I put random stuff about vain. Please do not take this seriously and I do not own vainglory . Beware of the weirdest things you're about to see.