As you may know, I'm a man of theories, especulation and conjectures, but I still don't have idea of how to explain human Carmilla, Trevor and Marie besides "illusions" but s far thadoesn't make sense, as hallucinations can't hurt you. Even more so Human Carmilla.. why her? gabriel didn't know her, and she didn't seem to have a important role, why not human Cornell or human Zobek?.