Masquerade

Masquerade (マスクリエード, Masukuriēdo) is an Automaton of currently unknown origin. Originally known as Project Bohuel (実験ボフエル, Jikken Bohueru), Masquerade has the unique ability to flawlessly transform into another person, copying their memories, magical abilities, physical form, species, and personality. Masquerade was created using data from the Celestial Spirit known as Gemini (ェミニ Jemini), however, its abilities are believed to be enhanced, and thus, superior.

Trivia

 * Masquerade was originally going to be named Gemini, due to possessing similar abilities.
 * Bohuel is Hebrew for 'Chaos of God', referring to Bohuel's state of having no discernible characteristics before acquiring a flesh form.