Maes Hughes

Maes Hughes (マース・ヒューズ, Māsu Hyūzu) is an old friend of Roy Mustang. Hughes's personality is sometimes seen as comical; tongue-in-cheek, and, to another extent very serious about his family and job. He is often throughout the anime seen as helping people; mainly befriending and giving advice to Edward and Alphonse Elric. He shows his sensitive side throughout the anime series towards various characters in addition, and is continually obsessed with his daughter. Hughes is very supportive of Mustang's plan to become Führer of the state military, stating; "I'll work below you and help push you to the top". A common gag involves Hughes calling Mustang on the Military's private phone line to either gloat about his daughter or advise Mustang to get a wife, promptly causing Mustang to slam the phone down in anger. He works in the military's intelligence division, where he learns of the homunculi's control over the country. Before he can get word of his discovery to Mustang he is killed by Envy. Nevertheless, his death leads Mustang to discovering the truth for himself.

Source: Wikipedia