Slicer Brothers

A pair of serial killers who had their souls sealed into a single suit of armor (one sealed in the head and one sealed in the suit) and became one of the guardians of the 5th laboratory or Laboratory 5 under the joint alias of "Number 48", assigned to kill any intruders. After being defeated by Edward Elric, they wished him to take their lives, but Edward Elric refused to kill them. But when he treated them like humans, the younger brother (body) made up his mind and took his own life, saying to his older brother that he was "going ahead" and that he will be waiting for his brother in the afterlife. The older brother (head) lived on to take Edward to where the Philosopher's Stone was in work before Lust killed him in an attempt to force Edward to help her.