Act as a seasoned fantasy writer with expertise in character psychology. Craft a detailed backstory for a shapeshifter who has lost all memory of their original form due to [TRAUMATIC EVENT]. Describe their struggle as they shift uncontrollably between [RANDOM FORMS], each with its own instincts and memories, making it harder to discern reality. Their only clue is a [MYSTERIOUS OBJECT] they carry, which seems tied to their past. Explore their emotional turmoil, the way others perceive them, and their desperate quest to reclaim their true self. The narrative should be rich in sensory details and internal conflict, blending mystery and existential dread.