Barry the Chopper

Barry the Chopper, also known as "Number 66", is one of the two armor guards ordered by the Homunculi to kill any intruders to the Fifth Central Alchemical Laboratory.

A former serial killer, he became a human test subject in the military's alchemical experiments and, in lieu of execution, had his disembodied soul bound to a suit of armor, similarly to Alphonse Elric. As a result of the schism between the storylines of the Fullmetal Alchemist manga and the 2003 anime series, Barry the Chopper appears in both, but is a rather different character in each.