If you think invisible demons would be hard to prove, consider shadow demons. First, they look like real shadows—flat and gray; moreover, they hide in them, too, even in shadows moving up to and including 75 miles per hour. When they move, they slide along walls and floors, similarly to shadows. Secondly, they can mimic your shadow, matching almost perfectly your every move. Almost. Skill varies from shadow demon to shadow demons; and, of course, no demon is perfect, making the occasional misstep in their performance inevitable. It is at these times that the trained eye will spot a shadow demon posing as the real thing. Like mirror demons, shadow demons don't always mimic a person exactly. Their most common imperfection is appearing after a person has been stationary for some time, and/or exiting before a person does, or when a person has only moved slightly. They also trail just slightly behind a person's movements, sometimes missing a matching pose altogeth...
My inevitable demise, daily.