Barry the Chopper (also known as "Number 66"-バリー・ザ・チョッパー, Barī za Choppā) 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.