“Dissociative identity disorder ( DID ), also known as multiple personality disorder, split personality disorder or dissociative personality disorder, is a member of the family of dissociative disorders classified by the DSM-5, DSM-5-TR, ICD-10, ICD-11, and Merck Manual for diagnosis.”
Somewhere off google.
Reptilian aliens have been known to be shapeshifters according to Native American legends—and David Icke.
;-)