Fullmetal Alchemist is Hiromu Arakawa's.
Head-canon, different from Intention. Assume that:
-Red Stones gives Homunculi their special powers, like Ultimate Eye, Ultimate Shield, etc., automatically except aging process simulation.
-Selection of a human for human transmutation is where most of the extra work occurs.
- Pride has a hairless base form, and he can alter it but not necessarily because human template had facial hair.
-Memories of the Homunculus are of their own human life.
-There was no Bradley before Bradley, so Pride/Bradley is not an imposter.
-The military is already in place.
-These events take place 20 years before 1901, so everything about the time Pride/Bradley takes power and how long he's in power doesn't raise suspicion and he doesn't have to simulate the aging process too drastically.
-Pride's creation is not like little Wrath's, who was dead human body --> Homunculus. Pride is created from dead human body + ingredients like the other Homunculi.
"I don't understand, Envy," said a Lust with a classical kind of beauty and a filled-out, motherly figure."How exactly are we going to find Pride amongst the garbage of human society? Shouldn't we find someone of rank, or at least a common soldier?"
"No way, Lust," Envy answered, in his teeth-filled way. "If the human had too good a life, the Homunculus might start longing for that human's life instead of doing what That Person says. And a soldier? Even worse, considering the conflict we're spreading won't necessarily spare the soldiers. The human's memories might stick in the Homunculus's mind, filling him with pesky doubt." Envy grinned. "That's why we need a human without ties to the state, even inimical to the state, yet won't assert too much authority, like a human gang leader or something."
"But we're assuming that none of these prisoners had a family--or had friends, or even were inimical to the state." said Lust.
"These prisoners were executed. Even if they used to love their government, I highly doubt getting offed by them made them particularly patriotic."
"And family or friends?"
"You can set your mind at ease with that--I already looked through the records on all of them--all single, no family left, all unpopular with the other inmates--the worst of the worst. Trust me, they got no ties binding them to this life."
"But why a prisoner?" Lust asked, just because she liked to be philosophical. "Wouldn't a street beggar do fine? They don't have anyone who cares if they live or die, they're inimical to the military, especially when they panhandle at public libraries and such."
"Were you asleep when That Person was giving us the lowdown, Lust? That Person doesn't want a weakling. She wants him to be strong, without looking like an ogre. Someone with a charismatic air--Huh." Envy looked over the corpses. "None of these look particularly charismatic."
"That would be a little hard, wouldn't it, considering they're dead. Why don't you let me handle choosing a pretty face," Lust glided a smooth circle around the corpses, gazing down into their eyes frozen in terror. Such fear when they met their unwilling deaths, forced suddenly and violently to face their own mortality at the hands of the state. "This one."
"What the hell's so special about that one?" Envy scratched his head.
"Something..indefinable about his eyes..." Lust said. "It's somehow alluring." She nudged the corpse's chin with her shoe, regarding him from a different angle.
"Yeah, that's fine, but is he strong?" asked Envy. He gave the arm a good, solid punch. Minimal bruising. "Alright, pretty and strong," Envy grinned, grabbing the corpse and slinging it over his shoulder. "Our job here is done--if That Person approves."
And so Pride was created, and enacting a hilarious irony, soon emerged as the head of state.