Answer:
You might accuse someone living with a stolen identity of being this.
What kind of room doesn't have physical walls?
The day is their night and the night is their day, when I shout and they shout back I run away.
What do you call a witch that lives in the sand?
Mouth up it gets filled, mouth down it gets empty.
I touch the Earth, I touch the sky, but if I touch you, you’ll likely die. What am I?