[@PlatinumSkink] Well it is colorless, except when being ionized by high energy radiation in which case it is green, (hance the color of auroras)  but that is ok, it doesn't need a perfect explenation,looking all blue and cool is 100% fine with me, since it looks super badass in my head ;)

As for what I would imagine it is when frozen, it would be a perfect mirror since there is no absorbance and nothing can pass through, it would thus be deflected since the state of the air can't change it can't absorb any energy from the photons. Zero distortion, nothing. Every time she paused it, it would precisely reflect light. Unless it got durty, accumulated debris or such on it, then that would be the same as if you got a mirror dirty. 

[@ProPro] I somehow totally forgot about this, no idea why. Ya, that fits into the being born from wealthy parents narrative. If you want you can have it as she justified it as being religous, say she was from India or somethong although India had its own unique cape politics....