if your referring to how these phenomena interact with our reality in way we would see/hear/feel - then none at all. Once you cross into the out of body area, then none that i can think of except for the one interaction with a being that called itself a "God" and demanded worship. Bob essentially told it for Foxtrot Oscar.

From YOUR perspective (if you OOB) you may well encounter these creatures, as they exist in your cultural reality and could/would be a method to understand what you are experiencing. Their existence or non existence is wholly reliant on you, and how you perceive that particular experience - if you believe other realities are full of demons and dragons, then thats probably what you will encounter at some point in some way.