Military
Colonel Roy Mustang (Flame Alchemist)
Ed's superior officer in the military, friend of Maes Hughes and an acquaintance of Hohenheim. At the time of his introduction in the anime, Mustang held the rank of Lieutenant Colonel and was stationed at Central, although he was tranfered early on to the Eastern Territories to clean up Lieutenant Yoki's mess. He was involved in the Ishbal War, though he could never forget the horror and the lives he took. Among them include the parents of automail mechanic and Ed and Al's childhood friend Winry Rockbell.
Lieutenant Colonel Maes Hughes
Member of the Investigations division who is good friends with Colonel Mustang and the Elric brothers. At the time of his introduction in the anime, Hughes held the rank of Major, and first met the Elrics while serving as a communications officer for General Hakuro. Hughes and Edward helped recapture a passenger train that had been hijacked by Bald. Hughes loves his wife, Gracia, and is absolutely obsessed with his little daughter Elicia. He is also very supportive of Mustang's plan to become Fuhrer, doing whatever he can to, as he puts it, "help him from the bottom to the top". While he may not be an alchemist, Hughes is however an expert in knife-throwing and carries small knives which he uses as protection when he is in battle.
First Lieutenant Riza Hawkeye
A hard-working member of the state military and most trusted in Mustang's circle of friends. At the time of her introduction in the anime, Hawkeye held the rank of Second Liertenant, and was stationed at Central, but like Mustang was promoted one rank and reassigned to the Eastern Territories early in the series. She is excellent with guns, and usually carries two with her wherever she goes. She has strong feelings for Mustang, though she draws the line with his 'miniskirt' policy. She also has a soft spot for the Elrics.
Major Alex Louis Armstrong (The Strong Arm Alchemist)
He was born into a family of alchemists and has mastered his family's skill of using his arm strength in his alchemy. He often takes off his shirt when in battle for no other reason than showing off his 'beautiful body'. Armstrong was part of the Ishbal War and has a sense of loyalty towards Roy Mustang. After Edward and Alphonse's battle with Scar—which cost Al his right side and Ed his automail arm—Armstrong volenteered to escort the boys back to Risembool in order to get Ed's arm replaced, and subsequently get Al's armor fixed.
Zolof J. Kimbley (Crimson Alchemist)
He uses the chemical properties in the human body to create explosives, turning people into living bombs. During the Ishbal War, he killed numerous civilians, women, and children just to hear the sound of them exploding. He was also the man who killed Scar's brother, making him a prime target on Scar's list. When he killed one of his superior officers, Kimblee was imprisoned in the 5th laboratory and sentenced to death. He was one of the prisoners the Homunculi and Shou Tucker tried to trick Edward Elric into using as a ingredigent to create a Philosopher's Stone for them, but Zolf blew up another prisoner to escape, exposing the truth to Edward.
Lieutenant Colonel Frank Archer
He is in charge of Intelligence. Very cool, calm, and collected. Archer thoroughly enjoys war and all his actions are aimed towards preparation for future wars. He is obsessed with glory and honor and becoming a hero, which is his main motivation for most of his actions in the series. Most of his body was destroyed at Lior so he was heavily modified with Automail. Archer was now more machine than man.
Librarian Scieszka
Her responsibilities include organizing and keeping records of all of the books in the Central City library, but due to reading books instead of working she was fired. Her talent to instantly recall entire books from her mind and recite them verbatim was a great help to the Elric Brothers for recreating Tim Marcoh's book. She also helped Hughes recreate State Military files lost in the library until he fired her to save Sheska from the military's higher-ups. After Hughes's death, she tried investigating his death herself, and succeeded in learning the strange discrepancies about King Bradley's secratery Juliet Douglas, which is the same information that Hughes discovered before he was killed.