Roy Mustang is the Flame Alchemist and a veteran of many
brutal battles. He personally knew Edward and Alphonse’s
father, which sparked his curiosity once he discovered that
Hohenheim’s sons were dabbling in alchemical arts.
Mustang is eager to climb the ladder of success and hopes
that discovering the immense talent within Edward helps him
ascend the ranks. Still, Mustang’s soldiers are the most loyal
in all of the State Army claiming there is more to this man
than his thirst for power.