7. Fregoli Delusion
Shape shifters and the like are intriguing to think about, while people suffering from the Fregoli Delusion believe them to be real. Essentially, they believe that there is an individual who can change his appearances seamlessly to fit into different characters. It is this individual according them, who is disguising himself as multiple people in the person’s life. In the mind of the afflicted, only one person is calling the shots behind the curtains.