We just imagine what they look like....They are fallen Powers and Principalities, are they described in the bible? Or is what we see what we think we see and not real....just dont know....
The proof is when they follow you from house to house down the generations, instead of dwelling at a particular home.
You can see them, ‘feel’ them (cold air, goosebumps) or be attacked by them in your sleep, where you feel AND see them.
They require casting out by clergy if you can’t even understand what you have on your hands, since you are a layman.
Read the end of Mark:
Mark 17:
And these signs will accompany
THOSE WHO BELIEVE; In my name they will drive out demons;
Theological elites are not necessary . . . and are often more the problem than the solution.