Name: Alex Louis Armstrong.
Birthdate: March 20th 1886 (Pisces/Aries cusp).
Title: Strong-Arm Alchemist.
Alex is a man that may come across as intimidating, but he is truly a ‘softie’ at heart. Calm more often than not, the Major is prone to spells of exhuberance as well as booming/shouting; and many a soldier has seen him cry over the plight of the Fullmetal Alchemist.
In short, he is highly sensitive.
He is more than capable of his rank, however, and his skill with alchemy is controlled with the same calmness he often displays. That’s not to say he considers himself a weapon of war - Armstrong refuses to slaughter innocents, and was shipped away from Ishval for this very reason.
"Major Alex Armstrong utilizes a style of combat alchemy that has apparently been passed down the Armstrong line for generations and mixes alchemical skill with physical prowess.
With the aid of two metal gauntlets strapped to his fists (both marked with transmutation circles), Armstrong transmutes objects mainly by punching them. It is possible that this method transfers the kinetic energy of his blows into the alchemical energy, enhancing the speed and force of his transmutations, since he mainly uses alchemy to rapidly produce large stone spikes, walls or other objects from the earth at a rate among the fastest in the series. Additionally, the Armstrong style allows Alex to double as a source of heavy artillery, transforming raw stone or brickwork into projectiles which are then launched with the force of his punch.
With his Alchemy being combined with hand to hand combat, it is notable that Alex is the first of the few State Alchemists to survive a direct fight with Scar.”
-taken from the Fullmetal Alchemist wiki