Mr. Mash-Up:
The product of his father’s dalliance with a cold but beautiful alien goddess, Mr. Mash-Up was the ‘black sheep’ of his demonic other-dimensional family.
Mash-Up houses a human-shaped empty vessel inside himself, and can tap into your mind and transform the vessel into a clone of whoever you hate.
Mash-up’s consciousness then transfers into the vessel and it crawls out of him, stretching and shedding his skin. The vessel is brittle, however--and if it breaks, Mash-up’s discarded shell sucks it back in, reforming around it--incubating and slowly healing the vessel.
Bitter and twisted, Mash-Up deserted his dimension and came to Earth, where he takes out his bile by becoming whoever people hate and tormenting them.
He also wears a brimmed hat to protect his delicate complexion from sunlight.