YMMV / Fullmetal Alchemist: The Sacred Star of Milos
Complete Monster: "Melvin Voyager", actually Security Chief Atlas, is a power-hungry, sociopathic Cretan soldier, who starts off by denouncing his vows to protect the Crichton family by brutally murdering the female protagonist Julia's parents and then rips the skin of Julia's brother's Ashleigh's face in order to steal his identity. This was done so that Atlas could easily manipulate the rebel group, Bats, into making a transmutation circle for him by promising Creta enough power to rival other nations. Ashleigh, in turn, ended up becoming a vengeful Knight Templar, seeking revenge for Milos after losing his faith for its people. After showing his true colors, Atlas murders Bats' leader, Miranda, so that he can use her blood to activate the circle. He then proceeds to murder his co-conspirator, Raul, as well when it turns out there is not enough sacrificial blood. After succeeding in activating the circle, Atlas sacrifices dozens of Amestrian soldiers by feeding them to Milos's machinery to create a Philosopher's Stone for himself. A textbook sociopath who abandoned his honor and home country for power, Atlas stood out as one of the most vile villains in the Brotherhood canon.
Moral Event Horizon: If Atlas using Julia and lying to her in order to create a Philosophers Stone isn't bad enough, then there's him murdering her parents and stealing her brothers face when they were both still children, whom he was supposed to be protecting.
The Untwist: It is pretty obvious that Atlas is the fake Ashleigh and Herschel is the real Ashleigh, Its noticeable when Atlas has a scar that looks like he is stealing a face and Herschel having no facial skin under his mask.
What Do You Mean, It's Not Political?: People from Milos trying to reach Table City are shot down, and the whole issue of deporting illegal immigrants and the fact that most people from Milos (at least the ones whom name we know) are named with Mexican-sounding names, like Carlos, Santos, Julia, Miranda, Raúl, Anita, Pedro and Gonzalez. Not to mention the flashback scenes of the people of Table City being conquered by one people, then another, both times being conscripted into the defender's army to try and stop them.