Some entities are “non-corporeal beings”. That word means they don’t have bodies the same way we do. Some of them may be multi-dimensional beings able to phase into or out of our dimension. If you want to label those entities as demons or ghosts, etc., fine.

Just be aware that along with these non corporeal entities, it is very likely that there are alien entities from other stars that are similar to us in that they have bodies and exist in our three-dimensional universe.

In the universe of infinite possibilities, it is possible that all these beings exist simultaneously. If you believe in a God that only created earth and only pays attention to humans, that’s pretty pathetic. The GOD that I believe in is the creator and master of the entire universe and every being in it.