User blog comment:Boss335GT/Questions about the White Trailer/@comment-11109699-20131009103053

In reply to #1: I think the armor is some kind of dust powered construct for training purposes, and that the scene takes place in Signal or a simular "High school" level acadamy

As for #2, I believe that the armor did not cause the scar, as it is much too small and straight to have been. Even when the idea that it was the plate armor that caused it is taken into account. Why, because her scar would be larger, more jagged, and appear to be more like a large gash than the thin, straight cut it is. That scar came from a sword, or another bladed weapon, not the armor's fist.