Maria Ross

Second Lieutenant Maria Ross is an Amestrian soldier stationed in Central City under the command of Major Alex Louis Armstrong. Described as honest, decent and caring by her superior officer, 2nd Lt. Ross is an exemplary soldier capable of balancing her dutiful professionalism with her personable human side.

Ross first appears when she and her partner, Sergeant Denny Brosh, are assigned to escort and guard Edward and Alphonse Elric in place of Major Armstrong after the three alchemists arrive in Central. Ross and Brosh, just as many others, initially mistake Al for the famous "Fullmetal Alchemist" and find themselves confused as to the brothers' idiosyncrasies, but come to an understanding with them relatively soon. When the Elrics head toward their initial goal of the National Central Library's First Branch, Lt. Ross is given the unhappy task of informing them that the building and all the precious research materials inside had been destroyed the day before their arrival in a fire whose origin appears to have been arson.

Lt. Ross and her partner continue to guard the young alchemists as they find other means of acquiring and deciphering the information they seek, and are further shocked by the Elrics' casual rapport with such high-ranking officers as Lt. Colonel Maes Hughes as well as the exorbitant amounts of money they are able to throw around as part of their yearly government research grant. But the real shock comes when Ross and Brosh are informed by the horrified Elrics that their code-breaking is complete and that the fruit of their labors has revealed that the Philosopher's Stone is made up of live human beings. The two bodyguards are ordered by the higher-ranked Edward Elric not to mention this finding to anyone, but are soon forced to divulge the truth when Major Armstrong presses them.

Together, the Elrics, Armstrong, Ross and Brosh investigate deeper into the matter and deduce that the Fifth National Central Laboratory was involved with the gruesome manufacture of Philosopher's Stones. Despite Major Armstrong's order to stay away from the facility until proof has been found, Ed and Al sneak away in the middle of the night to investigate on their own, putting Ross and Brosh - as their bodyguards - in a bit of a spot. Ross, furious, heads off toward Lab 5 with her partner in tow.

2003 anime
one of the soldiers assigned to watch over Edward and Alphonse Elric. Maria Ross is the partner of Denny Brosh. Both are introduced when they are assigned to protect Edward Elric, who she develops a maternal affection for. Envy takes her form in order to get close to Lieutenant Colonel Maes Hughes, and kill him.

Ross later appears in the rebellion against King Bradley, saving various characters from execution.

Trivia
Maria Ross' prison processing number was W6186.