Sigma's Bodies

Sigma has used a plethora of bodies throughout the Mega Man X series. After his original body was destroyed during the events of the first game, Sigma returned in a new form. He is able to return again and again due to the power of the Sigma Virus that he is bonded to.

Sigma usually appears as a bulky, bald humanoid in most of his first stages; his most pronounced feature is a crystal on his forehead, and two parallel scars running through his eyes. He often produces a second form after his initial defeat in a game, which frequently has the head (or the crystal on it) as a weak point. Although he has been destroyed countless times, Sigma's programming always survives and builds himself a new form, ready to menace the world once again. It is implied that he grows more insane with each transformation.

Mega Man X
This is the body Dr. Cain originally built for Sigma before the events of the first game. Sigma's first body was designed with a beam saber; in fact, contrary to popular belief, it was Sigma who was the first to use one in the series, and not Zero. Sigma's forehead crystal was able to project small red energy bursts