You're Edward. Your little brother is Alphonse. Your father abandoned you when you were 10. Your mother died in front of you. You and your brother tried to bring her back, using the "ultimate taboo" to do it. But you're the main reason. The Law of Equivalent Exchange states that you can't resurrect a human life. But you tried. And ended up making your little brother lose a lot and traumatize you both very, very deeply. Your brother lost his whole body. You made a soul-binding seal in a suit of armor with your own blood to have him back in said suit. You lost your right arm and left leg. Only you saw "Everything." Your childhood friend, Winry, made you reinforced metal prosthetics, known as automail. You burned down your childhood home as a reminder to never go back. You're a State Alchemist. You're the Fullmetal Alchemist. People call you small and mistake Alphonse for the Fullmetal Alchemist. You work for the military. You're on a mission to get your bodies back at all costs. You're self-taught in most of your skills. You've walked through The Portal of Truth 4 times. Führer Bradley is Wrath and uses his influence to get what he wants and go through with Father's plan: transmutate the entirety of Central into the greatest Philosopher's Stone. Pride is in a child's body and the strongest Humonculus. Father created the Humonculi. You've met FAR TOO MANY allies to give up now. You and your brother have been through Hell your entire lives.
You're standing on a rooftop. Your long, blonde, braided hair flows in the wind. It's midnight. Your coat billows in the wind. Alphonse stands beside you, his giant armor suit steady. You're waiting for a supposed "important mission" from the Führer. Because he threatened to kill Winry if you don't follow. After a while, you're greeted with the remaining Humonculi. Envy, Pride, Gluttony, Sloth, and Greed. They all land on the rooftop, Sloth almost bringing it down with his size
Envy: You actually came, half-pint. You're stupider than you look.