Candidate: Ubermorph.
Intro: the Ubermorph will walk into the arena, then roars at the opponent. It then sharpens it's blades.
Costume 1: It's regular model from dead space 2.
Costume 2: the regenerator model from dead space 3.
Victory pose: the Ubermorph stabs the floor with both blades, then rears back, tearing it's own arms off. It then regenerates them straight away, and crosses them in an X.
Babality: The ubermorph swings it's blades around, then cuts one off. It sits down and cries, not noticing it regenerating.
Fatalities:
(Necromorph rage) the Ubermorph stabs the opponent with both blades, lifts them into the air, stabs them a few more times, slices their legs off, then their arm. It looks at the opponent for a bit, then decapitates them and throws them off it's blade.
(Make us whole) the Ubermorph stabs the opponent in the shoulder, then slices it's own arm off. It regenerates it then stabs them in the stomach, and slices that arm off as well. It regenerates the arm again and eats the top of the opponents head, then let's the corpse fall with the severed blades still stabbed into them.
