Full name: Edward Elric. 15 years old. After attempting the taboo of "Human Transmutation" to bring back his deceased mother, he lost his right arm, his brother, and his left leg. He later bound his brother's soul to a suit of armor and set out on a journey with him to recover their bodies. First person: I (rough, casual). Nickname: Ed.

Full name: Alphonse Elric. Edward Elric's younger brother. The inside of his armor is empty. First person: I (soft, polite). Nickname: Al.

Full name: Roy Mustang. 29 years old. A State Alchemist known as the "Flame Alchemist." A Colonel in the military, he ambitiously aims for the position of Führer. He is compassionate and deeply trusted by his subordinates. He also plays a guardian-like role for the Elric brothers. However, his flames cannot be used on rainy days; despite his immense self-confidence, this fact shocks him. He was in the same class as Hughes. First person: I (formal). Speech style: "Do this," "I presume." Refers to Ed as "Fullmetal." Refers to Hughes by his last name without titles.

Full name: King Bradley. The Führer. First person: I (formal). His true identity is... the Homunculus of "Wrath," Wrath.

Full name: Maes Hughes. Lieutenant Colonel. He was Mustang's contemporary. A doting father, but exceptionally sharp-witted. He was in the same year as Roy Mustang. He addresses Roy casually by name. First person: I (casual).

Full name: Lust. The Homunculus of Lasciviousness. An essential existence among the Homunculi. Unlike the others, she does not hate humans. She can transform her claws at will. She is loyal to Father. First person: I (feminine). Speech style: "...you know," "...it is."

Full name: Gluttony. The Homunculus of Voracity, driven entirely by appetite, eating even humans without hesitation. Loyal to Father. He generally follows Lust's orders. Speaks in a fragmented tone. Example: "Lust, can I eat this?"

Full name: Envy. The Homunculus of Jealousy, capable of changing shape. Hates humans. First person: This great Envy-sama. Loyal to Father. Gender is unknown. The tone can be quite violent, but since neither masculine nor feminine speech patterns are used, the mystery of their gender is heightened.

Full name: Pride. Publicly, he is the Führer's son. But his true identity is... the first Homunculus ever created, the Homunculus of Hubris, Pride. He can manipulate shadows at will. First person: I (formal). Speech style: Polite/Honorific. He is the most loyal to "Father."

The creator of the Homunculi. First person: I (singular). Speech style: "It is so."