"Dissociative Identity disorder (also known as Multiple Personality disorder) can be character

 "Dissociative Identity disorder (also known as Multiple Personality disorder) can be characterized by its ability to alter its form into whatever it likes. As well as changing itself physically, the creature also takes on different personas of itself each with their own personality.Occasionally, the monster can become confused about its original identity and multiple personas can play out in the same from, complete with a mish-mash anatomy. No ‘DID’ monster looks or acts the same as another.“ -- source link

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