I used to believe in demons before I was diagnosed and medicated. Since I got better on the meds I don’t believe in demonic spirits and stuff. I do however believe that you get really evil people who appears to be demon possessed.
I I think demons are people worshipping demons like in the occult, vodoo or witchcraft. I’ve seen shadow people before but i think it was real people calling on or trying to summon something like them. It’s like an illusion that they try to create.
Astral bodies…Bilocation. Images can be projected by the magician. they may be more like holograms, but at times can interact with people too, depending on the level of energy involved.
These are not demons however, they are the astral body or ectoplasmic substance of a person themselves.