IDK, I was thinking that too. He may have the ability to alter his appearance too. I mean he can make bugs come out of his body. It almost makes me wonder if Harry has been using Mysterio tech but that doesn't explain that he can possess people, get inside dreams, teleport through walls, etc. He also says that he has basically resurrected himself so many times but he never gets used to it. So it sounds like the Harry we've been seeing can travel in and out of hell at will or something.