Monster: Fire Emblem

That Queen Hilda...is wicked to the core. She began abducting kids after allying with this dark bishop {Manfroy}. She kills the mothers, too, without a blink of an eye! That woman's not even human. I'd say she's more like a devil!
—A Miletos villager, Genealogy of Holy War

Fire Emblem has many characters, and the villains come in many varieties, but only a few are Complete Monsters.note 
Unmarked spoiler warning.

The Archanea Games

Mystery of the Emblem
  • Lang, Marquess of Adria, betrayed his nation to the Dragon Empire of Dolhr so he could rob from his own people. When Dolhr started losing, Lang defected back to Archanea. Taking advantage of the now Emperor Hardin's Despair Event Horizon, Lang gets himself appointed as Overseer of Grust, a defeated nation that in the previous war allied with Dolhr. The sadistic Lang commits various atrocities on Grust, including killing men that could oppose him, capturing young girls to rape and pimp; ordering the massacre of family members of those who participated in the rebellion; and executing the preteen heirs of Grust. When confronted over his actions, Lang tries to put the blame for his action on the Emperor so he could trick his foes into letting their guard down. Selfish, loyal to no one and willing to do anything to satisfy his own greed and sadism, Lang is among the worst Archanea has to offer.
  • Gharnef, who first appeared in Shadow Dragon, turns evil and later killed Linde's dad, Miloah, solely because their master gave him the Aura spellbook; and led the attack on Altea that killed King Cornelius, stealing the Falchion and kidnapping Elice. He brainwashed Tiki into attacking Marth and manipulated Hardin, corrupting him via the Darksphere. He also kidnaps four innocent girls (Elice, Nyna, Rena, and Maria) as sacrifices for Medeus's resurrection. Worse, this also causes a huge war that turns the continent to hell and ruins the lives of many. In the remake New Mystery of the Emblem: Heroes of Light and Darkness, he brainwashed Eremiya, the kind-hearted caretaker of a destroyed orphanage, to make her the horrible Tyke Bomb we met and fought. And once she lost against Marth's group, he restored her memories,purely to mock her as she died in despair.

The Jugdral Games

Genealogy of the Holy War
  • Bishop Manfroy (who has a cameo in Thracia 776), Dark Priest and leader of the Lopto Sect, spends years patiently preparing the way for the return of the dark god Loptyr . Using assassination and manipulation, Manfroy creates a massive war, which initiates the chaos necessary for his plans. To create Loptyrís vessel, Manfroy kidnaps Deirdre, the wife of Sigurd, cruelly and gleefully erases all her memories of her beloved husband and son, and places her for his pawn Arvis to find, fall in love with and marry despite the fact she is his unknown half-sister. With his goal achieved, Manfroy awakens Loptyr in Deirdre's son Julius and sets about constructing a nightmarish dictatorship where children are sacrificed and any who resist are massacred. Manfroy even murders his own son-in-law and drives his daughter into madness, and also exerts mind control over Julius's twin sister Julia to make her kill her beloved friends with nothing less than sadistic relish. A manipulative priest of a Religion of Evil who seeks to enact an endless regime of nightmarish suffering for the sole reason that he can, Manfroy sticks out as the worst in the Holy War.
  • Queen Hilda of Freege, for no other reason than For the Evulz, wholeheartedly supports, and participates in, the movement of sacrificing kids to Loptyr. Later on, it is revealed that she is responsible for the abuse of Taltio/Tiltyu (fatally) and her daughter Teeny/Tinny (a 2nd generation character). Hilda takes extreme pride in her actions, gloating about it in front of her children. If Tiltyu dies childless, her and Blume's little sister Ethnia will replace her as Hilda's punching bags, alongside her children, Amid and Linda (replacements for Arthur and Tinny). And although her daughter, Ishtar, was not physically abused, she was still manipulated by her mom because of her love for Yurius, which Hilda saw as a chance to gain even more power than she already had.

The Tellius Games

Path of Radiance
  • "Mad King" Ashnard, the pinnacle of a Social Darwinist, became the King of Daein by getting his father to sign a blood pact, and then invoking it, killing everyone who was in his way to the throne, as well as countless other innocent people. He then proceeded to kill his own father, therefore becoming king. After finding out about the dark god (really the goddess of chaos, Yune) sealed in Lehran's Medallion, he decides to release it. This requires a war that spans the whole continent, so he decides to begin by invading the next country over. He also, after finding out that his own son Soren was unable to transform into a dragon like the child's mother Almedha used to be able to, decides to hold him captive to get ahold of the kid's uncle, the oldest son of the king of Goldoa. He then proceeds to warp Rajaion's body and turn him into something resembling a wyvern, and then uses him as a mount. He laughs at everything. His ideal world, the one that he wishes to create, is one where the only thing that matters is power.
Radiant Dawn
  • Izuka, Ashnard's demented chief scholar, is no less evil than his master. In his brief cameo in Path of Radiance, he appears onscreen just long enough for it to be revealed that he is the developer of the Feral Ones, Laguz who are forcibly mode-locked into their beast forms and driven insane to be used as Cannon Fodder. In his base at Gritnea Tower it is revealed he has a basement devoted to storing the corpses of his experiments' victims. Izuka takes on a much greater role in the second game, where he has been hired by Lekain to bend Daein to Begnion's whims. He takes on the role of strategist to Daein's weak-willed Prince Pelleas, where it is demonstrated that he would gladly sacrifice good strategy for pointless destruction. He injects the innocent Muarim with the Feral One drug, which would have annihilated his mind if not for Rafiel's intervention. When Begnion offers to make peace with Daein, Izuka springs his trap, telling Pelleas to sign a "peace treaty" that is actually a Blood Pact, mystically binding Pelleas and thus all of Daein into virtual slavery to Begnion. Finally, it is revealed that he's tested his drug on the Beorc, too, including turning Elincia's noble Uncle Renning into the Tragic Monster known as General Bertram.
  • Vice-Minister Lekain, Duke of Gaddos, is a high-ranking politician of the Theocracy of Begnion and senior-most member of the country's corrupt senate who is driven by his insatiable desire for more power and hatred for the Laguz. When Begnion's Empress Misaha emancipated the country's Laguz slaves and planned to reveal that the royal lineage of Begnion was Branded, Lekain had her poisoned, then, pinning the crime on the peaceful Heron Laguz, whipped his countrymen into a genocidal frenzy, reducing the Herons' population from thousands to four in a single night. He then conspired for Misaha's young granddaughter Sanaki and a young senator by the name of Sephiran to be elevated to the positions of Empress and Prime Minister respectively, the only positions higher than his own, while he held the real power from the shadows. After Daein lost the war to Crimea, Lekain had the defeated nation annexed by Begnion, and gave Duke Numida and General Jarod free reign to do what they pleased with it. When Daein declared independence, Lekain tricked its new king, Pelleas, into making a Blood Pact with him, a mystical document that conscripts one nation in service to another under penalty of its citizens dropping dead one by one. Using this magic Lekain enslaves Pelleas and the Daein army to act as his accomplices in a war which Lekain plans to use to wipe the Laguz species off the face of the Earth.