Complete Monster/Fire Emblem

"That Queen Hilda of Chronos is wicked to the core. That woman's not even human. I'd say she's more like a devil! — A Miletos villager, Genealogy of the Holy War" Fire Emblem villains basically fall into one of 4 types: some form of mad scientist/mad wizard/Evil Overlord/Psycho for Hire that, although unsympathetic, does not actually engage in a series of truly horrendous acts, Complete Monsters, the Worthy Opponent who won't join you (oftentimes due to complications arising from Honor Before Reason), and an enemy soldier or non-Big Bad/The Dragon type who was either looking for an out from their own corrupt army or willing to join up with your army for some other reason. Here are some of the monsters...

Archaneia

 * Duke Lang of Ardia is one of the earliest examples. It's mentioned in the first game that he was a noble of Akaneia who betrayed his nation to Medeus and stole wealth from the poor, then went back to Akaneia once they start winning again. He is then made overseer of the defeated Grust, replacing Lorenz. It's mentioned, in the most kid friendly way possible, that he steals wealth from the poor, kills boys over ten, rapes and kills girls over ten, and kills entire villages if one person from there rebels, a technique the Schwarze Rosen later picks up. When you attack him, Lang says that he was forced to do this by his boss, asking for mercy, but it is simply a trick to get the first attack in. Even Medeus and Gharnef have vaguely defined backstories on why they're bad; Lang is simply pure evil with no explanation. This guy is so over the top that he basically exists to make Marth realize that there's something wrong with Akaneia and rebel. His actions were likely done to provoke Marth into conflict, making him look like a traitor.
 * Let's not get Gharnef off the hook, though. He turned evil and later killed Linde's dad, Miloah, solely because their master gave him the Aura spellbook instead of Gharnef himself, led the attack on Altea that killed King Cornelius to grab the Falchion and kidnap Elice, brainwashed Tiki into attacking Marth, and manipulated Hardin and corrupted him via the Darksphere, leading to four innocent girls (Elice, Nyna, Rena, and Maria) to be captured and offered as potential sacrifices for Medeus's resurrection. Worse, this also causes a huge war that turns the continent to hell and ruins the lives of many. And in the new games, he brainwashed the caretaker of a destroyed orphanage, Eremiya, to make her the horrible Tyke Bomb training bitch 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! What The HELL, Gharnef.

Gaiden/Echoes

 * Desaix is the chancellor of Zofia and the general of a rebellion to overthrow King Lima of IV and seize the throne for personal gain. He clandestinely murdered many of the children fathered in Lima's Royal Harem to keep away any and all rivals to the throne. When Sir Mycen tried to stop him, Desaix put the blame on him and had him banished. One particular instance involved a fire. During it, he ordered Slayde to kill both Princess Anthiese, better known as Celica, and Prince Conrad during the king and the royal guard's absence, as well as killing everyone else in the royal villa in order to avoid witnesses. By the game's beginning, Desaix conquered the Zofian castle and killed King Lima. Although the Deliverance was formed in order to oppose Desaix, he manages to capture the Zofian knight Mathilda, Clive's lover, to use her as leverage to force his surrender. After suffering a defeat from the Deliverance led by Alm, Desaix retreats to his fortress and announces Mathilda's execution as a show of power. When the Deliverance arrives, he orders his archers to kill her slowly and painfully. Although he claimed he could be a better king than the hedonistic Lima, Desaix is nothing more than a powerhungry, traitorous, and murderous man driven by personal ambition rather than the good of Zofia.
 * Jedah is the fanatical mastermind behind all the evil in the story, having corrupted the Duma Faithful into a Religion of Evil after exiling the previous leader Halcyon, as well as sacrificing two of his three daughters to the Mad God Duma. Acts 4 and 5 reveal Duma provided the Kingsfang for Rudolf to seal Mila and take her away. Jedah is aware of this fact and eagerly awaits Celica's imminent arrival. He lays the seeds of his trap by approaching Celica at Dead Man's Mire, demanding that she offer up her soul to Duma in exchange for him releasing Mila from the madness that plagues all Dragonkin. At Duma Tower, Jedah gleefully reveals what happened to Mila—instead of at the top, she's at the bottom on Duma's altar. She turned herself to stone along with Falchion. So Celica finally comes clean that her soul in particular is needed to revert the disaster. Before everyone protests, Jedah warps her group away and tells Celica to wait and watch the boy (Alm) suffer. After Cecilia submits to him, Jedah makes good on his promise to offer up her soul. Finally when Celica begs Alm to kill her so nothing else bad comes to pass. Jedah sits back and gleefully watches the marvelous re-enactment of Duma and Mila's struggling. His ultimate goal is to start an age of fear and chaos cradled in Duma's shadow.

Judgral

 * In Genealogy of Holy War, we have Queen Hilda, the power hungry queen of Freege. As you gather information from village to village, you learn that she wholeheartedly supports the movement of sacrificing kids to an evil god and did it For the Evulz. Later on, it is revealed that she is very much responsible for the death of one of the first generation characters, Tiltyu, by abusing her and her daughter Tinny (who is a 2nd generation character), again For the Evulz (other 'traitor' reasons for her is just side things), to the point that she was reduced into a shell of her former cheery personality and died with it. And Hilda takes pride in it and gloats about it in front of her children.
 * Hilda is actually so evil that she even comes up as an abusive bitch when Tiltyu and her kids are not there for her to abuse. Yeah, if Tiltyu dies child-less, 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 the same goes for her daughter, Dark Magical Girl Ishtar, who may not have been physically abused as the others but still was manipulated by her Evil Matriarch mom because of her love for Yurius, which Hilda saw as a chance to gain even more power than she already had.
 * But let's not have the bigger CM of the game off the hook, huh? Manfloy the Dark Priest and archbishop of the Loputo Sect...
 * First Generation: He manipulated various rulers and dukes, causing the war against Isaac by using Duke Reptor of Freege to assassinate Ira's father, King Mananan, while also manipulating King Chagall into killing his father and sending his envoy, Sandima, to stir up trouble in Verdane. During this time, he worked primarily with, whom he was blackmailing with the knowledge of Later, he kidnaps and brainwashes Sigurd's wife, Diadora (and in one of the mangas, he outright mind rapes her and laughs about it), then manipulated her and the emotionally-weakened Alvis so they'd marry and have children who could be used as Loputo vessels. And as the cherry on top, he
 * Second Generation: A while before it started, he gave Prince Yurius the Loputo tome, causing him to become the vessel for the Dark God and kill his mother Diadora while attempting to kill his twin sister Yuria, shaping him into the horrible rival we'd meet later, and also attacked his pregnant daughter and his son-in-law purely because they broke his Parental Marriage Veto, killing him and driving her into insanity, which would cause his soon-to-be granddaughter Sara to be pissed off at him forever. And after all of that? He organized and helped commit the horrible child hunts already mentioned, and later kidnapped Yuria (who had been taken in by Levin, and later by Celice's army) and brainwashed her so that she'd become his and Yurius's Apocalypse Maiden. Go. To. HELL. Manfloy.

Blazing Sword

 * In Blazing Sword, there's Sonia Reed. Manipulating a small group of Robin-Hood-like warriors and turning them to the dark side to suit her master Nergal's purposes, directing the group in acts of terrorism and murder, and abusing her own family, particularly her button-cute adopted daughter Nino are evil acts to be sure. But mercilessly slaughtering her husband, the leader of said band, after mocking him for believing she'd ever truly loved him, trying to get one of her underlings to kill Nino after another empty promise of love and affection, and, right before her final attempt to kill her, revealing that she'd murdered Nino's entire family after having promised them she'd spare their lives and just kept Nino around due to Nergal's orders, pretending to be her mother all her life but never giving her any true parenting at all, are acts that any gamer with a scrap of heart tissue railed as unforgivable. Despite being a highly advanced Artificial Human, Sonia disdains other morphs, mistreating them, calling them puppets and abominations, and using a We Have Reserves policy with them. She was loyal to Nergal only so far as it got her the power she craved, and to the very end expressed no shame and no remorse for any of her crimes - only self deluded narcissism.
 * Potentially even worse is Ephidel, certified Evil Chancellor, Treacherous Advisor, and essentially walking Diabolus Ex Machina who has a tendency to ruin anything resembling plot resolution by stabbing people. The old Marquess with essential information? Ephidel stabs him. Lyn's grandfather, who you spent her entire campaign trying to save? Ephidel stabs him. Not to mention Leila, the Ostian spy and Matthew's girlfriend, who looks set to join your party - Ephidel calls on Jaffar, has her killed, and then orders Jaffar to leave her body in a position to make her look like she's still alive to mock the party. When the party confronts Ephidel over the issue, he proceeds to mock them, asking if "the gift" he left them was "to [their] liking". After driving Marquis Darren to madness and leading to his death, Ephidel attempts to aid his master Nergal in summoning the fire dragon to wipe out everything in it's path, and directly contributes to the death of Eliwood's father. Sonia at least ; Ephidel knows exactly what he is and, judging by the extremely irritating smug grin he perpetually wears, revels in it. His death is among the most satisfying moments in the whole game, and you don't even get to do it.
 * We also had Lundgren, Lyn's great-uncle. He is willing to send assasins after Lyn, poison his own brother Hausen just for a throne, and way too happy to mock his brother at the prospect of his granddaughter's death. Not only that - he spreads lies about Lyn being an imposter and Kent and Sain traitors, forcing the latter two to fight and kill their own friends and colleagues in battle due to a misunderstanding; and later, he blackmails the loyal and honourable General Eagler into fighting against his beliefs by holding someone close to Eagler hostage. Granted, he does believe, on some level, that Lyn's Sacaen heritage makes her unfit to inherit, but his own hunger for power and lack of loyalty (lampshaded by Matthew, stating "we can expect him on Ostia's doorstep before long"), coupled with his callous disregard for casualties even among his loyalists, makes him one of the game's most despicable individuals.

The Sacred Stones

 * Valter from The Sacred Stones, a Wyvern Rider General who, after touching a cursed lance, had his bloodlust multiplied tenfold. He was originally kicked out of the Grado army for massacring even retreating enemy soldiers, even when ordered not to. When he's brought back, the only reason he doesn't capture Eirika and Seth immediately at the start of the game is so he can "savour the hunt ... and the kill" (his exact words). Later, he toys with Selena's emotions, telling her Emperor Vigarde is doubting her loyalty and ensuring that she dies fighting Ephraim. When his more honourable foil Glen begins to doubt the Emperor, Valter not only murders him, tricks his little brother Cormag into believing Eirika is responsible, which may lead to his death if you don't recruit him with either Eirika, Duessel, or Tana. To top that all off, he's a Giggling Villain who delights at the thought of capturing Eirika and Ephraim - after a long-winded chase - because he enjoys tormenting, taunting, and holding back. Even Riev states that Valter doesn't care about rules and morality, simply doing what he wants.
 * Riev, a former bishop who, for no discernable reason, began to worship the Demon King. He leads/raises the Demon King's demonic armies to murder people, including raising a ship for them to use in sinking any boats on the water - just for his amusement. But when he stands by as the Demon King kills Myrhh's father Morva and raises him as a DracoZombie to fight his own daughter - perhaps even committing the deed himself - it becomes very clear how much you want him to die. Unfortunately, . Fortunately, . Phew!
 * The Demon King Fomortiis, especially on Eirika's route, shows himself to be a particularly depraved and sadistic monster. After possessing the Prince of the Grado Empire, Lyon, Fomortiis resurrects Lyon's father into a soulless puppet and uses him to initiate a series of brutal invasions to destroy the Sacred Stones of the other countries that have sealed the rest of him away. With a huge war and massive amounts of death, Fomortiis eventually reveals himself while also reviving monsters and undead creatures to run rampant throughout the land and kill those in their path. In Eirika's route, where Fomortiis possesses the prince completely, Fomortiis explicitly leaves a part of his mind intact to torment him as Fomortiis destroys everything around him, and also kills the heroic dragon king Morva before reviving him as an undead abomination while seeking to corrupt and dominate the world itself.

Tellius

 * Izuka, from Path of Radiance and Radiant Dawn is pretty much Fire Emblem's version of Josef Mengele. He transformed hundreds of Laguz into Feral Ones, crazed Laguz forced into their beast forms, and he considers it all in the name of science. In the second game, he tries to transform one of the Laguz on his side into a Feral One; luckily, you're able to prevent him from doing this. And that's before you learn that he chose Pelleas to be king of Daein so that the senators could force him into a blood contract. This forces Pelleas to either do as the senators say, or watch as his kingdom dies. He also used the Feral One-creating elixir to turn Elincia's uncle, Renning, into the insane Bertram (showing that it also works on Beorc, albeit differently than with Laguz). Fortunately, the Heron Laguz are able to cure him. It is immensely satisfying when you finally get to kill the slimeball.
 * Let's not forget that Izuka also lied to everyone about Pelleas being Ashnard's son and heir. Including Almedha, the mother of Ashnard's child, who was almost driven mad because her child was taken away and she was too emotionally unstable to stop and think about whether or not the boy Izuka introduced as her son was actually her son.
 * Also from Radiant Dawn, we have Lekain, who will do anything to move up on the social ladder. ANYTHING. Even directly causing the genocide of the most peaceful race on the planet by blaming them for the assassination of his country's empress. And did we mention he was the one who actually killed her? His main goal is to exterminate all Laguz off of Tellius in order to accomplish this, he tricks the weak willed leaders of Kilvas and Daein into signing blood pacts. Meaning that the leaders of the said countries must do as the Senate says or citiziens will be killed off on a daily basis.
 * Let's recite everything ELSE that bastard did: he made Sanaki and Sephiran the Empress and Imperial Advisor of Begnion so that no one would get wise to the Senate's actions or to the fact that the REAL Apostolic heir was killed along with Misaha. (It turns out Micaiah survived somehow.) THEN, he puts Daein under Jarod and Numida's mercy, where they suffer the fate of Eastern Europe by the Soviet Union during the Cold War. He THEN starts the war with the Laguz Alliance to expand his influence and exterminate ALL laguz, along with Sanaki and Sephiran, and framing the remaining herons YET AGAIN. And EVEN when everything is stone, he orders a mob of zealots to kill you under the impression that you are Satan's minions! WHAT THE F**K!??!?!
 * Don't forget Ashnard. He's not called the "Mad King" for nothing. This guy became the King of Daein by getting his father to sign a blood pact, and then invoking it, killing everyone else who was in his way to the throne, not to mention countless other innocent people. He then proceeded to kill his own father, therefore becoming king. After finding out about the dark god,, sealed in Lehran's Medallion, he decides to release it for the lulz. 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 was unable to , decides to hold him captive to get ahold of . He then proceeds to . He laughs at everything. He wasn't even aware of the existence of Jill's father, Shiharam, who was a pretty high-ranking Daein general. He doesn't care at all about anyone except for himself, and he'll do anything, ANYTHING, to get power. His ideal world, the one that he wishes to create, is one where the only thing that matters is power. And did I mention that this is the guy that the aforementioned Izuka used to work for?

Awakening

 * Validar is the leader of the Grimleal and the father of the Player Character, Robin, who desires nothing less than to bring his eldritch master, Grima the Fell Dragon, into existence. Eugenically breeding his child to be an ideal vessel for the evil god, Validar's plots were initially foiled by his wife, who spirited the baby away, causing him to decide to lie low for more than a decade. He takes over the country of Plegia following the apparent demise of its ruler, King Gangrel, and promises aid to Ylisse, Plegia's traditional enemy in whose army the now-grown Robin serves, against The Empire of Valm; secretly, Validar only does this to corrupt Robin and eliminate Valm's threat to himself. Once Valm is defeated, Validar betrays Ylisse and steals its' holy relic, the Fire Emblem, to use to unseal Grima. Validar takes over the minds of the majority of his country's population, forcing them to march on foot toward a Grimleal holy site and then commit mass suicide to offer their souls to the Fell Dragon. Throughout the game, the one person he appears to be close to is his right-hand woman Aversa, but it's eventually revealed that when she was a girl, he massacred her family and then edited her memories to cause her to believe he had saved her life after their murders.
 * In Fire Emblem Warriors, Validar returns as one of King Oscar's generals who leads a portion of the Gristonne forces and attempts to stop the Aytolisian royals. Validar is first seen leading an attack on a temple belongs to Aytolis, and later takes residents in the Dragon's Table in order to resurrect the Chaos Dragon. During the ensuing fight with the Aytolisian forces, Validar once again corrupts Robin and tries to make him attack his loved ones against his will, only to be thwarted again and driven back.
 * Grima himself is the self-proclaimed Fell Dragon. Attempting to destroy humanity with his human proxy, Grima is stopped by Naga and the First Exalt. Before his sealing, Grima created the Grimleal, a cult of madmen that worships Grima as a God—despite Grima faking being a god—and dedicates itself to eugenically creating another vessel for Grima to possess. After a thousand years, the cult eventually produced a successful vessel, Robin, but they escaped. In an alternate timeline, Grima possessed Robin, keeping his spirit conscious, so Robin is Forced to Watch Grima kill all his friends and exterminate humanity. Grima taunts survivors about killing their parents, and mocks Robin's loved ones about stealing his body. When Lucina escapes to an alternate past, Grima follows her back, taking control of the Grimleal. Grima takes control of many Plegians to make them commit a mass sacrifice to revive his past self, intending to kill the past Robin after refusing to be the vessel for the Past Grima. Omnicidal, sadistic, and uncaring about even his closest followers, Grima more than lives up to his title.
 * Awakening also has Excellus, Walhart's Treacherous Advisor as a candidate for this trope as well. Not only does he look grotesque as hell, but he also turns a huge chunk of the Valmese Rebellion against the heroes, and was perfectly willing to fork over the Fire Emblem to Aversa and Validar in exchange for ruling Plegia without even knowing what it really does. And that doesn't even cover how he tricked Say'ri into killing her own brother, General Yen'Fay whom he blackmailed to serve his boss, and taking sadistic pleasure in revealing the truth to her. Even Walhart and his other goons utterly despise this twisted freak, as shown by their interactions with him. All things considered, when Walhart revealed that he knew of Excellus's treachery from the very beginning, and forces him to stand and fight on the front lines instead of hiding like the pathetic Dirty Coward he really is, it's utterly satisfying to finally end his pathetic life. Hell, Iago from Fates might as well have been following in this guy's footsteps.
 * Death's Embrace DLC: While the main Algol is just an ineffectual Grimleal, this Outrealm version is far more monstrous. Part of an evil cult, he is in the business of assassination. He grew tired of normal humans constantly failing him thanks to their inherent weaknesses, leaving him with a desire to create the perfect assassins. To that end, Algol dabbled in necromancy, finding the dead to be more much efficient and subservient. He's had his undead assassins massacre villages, the actual number long left his memory, including the one Chrom and the Shepherds find at the start of the DLC. While the rest die away, Algol kidnaps the ones who fought the hardest and, before he converts them into Risen, he manipulates them in their dying moments to convert them to his side from beyond the grave. His victims retain a semblance of their humanity even afterwards but can do nothing but kill in service of Algol. His masterpiece, a Risen Chief, suffered a similar fate but is in a more crudely abominated state. In the ensuing fight, Algol's base of operation is lined with powerful spikes that badly hurt both the Shepherds and his "children." Though he fully intends to leave, Algol sticks around long enough to see the Shepherds suffer. A Card-Carrying Villain with boundless sadism and working off bloodlust, the alternate Algol is a surprisingly dark villain for someone so minor in the grand schemes of things, to such an extent the aftermath left the battle-hardened Chrom in a small Heroic BSOD

Fates

 * Iago is the right-hand tactician of King Garon of Nohr who excels at sorcery and illusions. In Birthright, he tries to instigate a feud between Corrin and the Wind Tribe by disguising some of the tribalists as Faceless to be killed. Later, he cruelly attacks Flora despite being in the wrong, tries to have Corrin and their group digested alive by a resurrected Fort Dragonfall, and is implied to be behind Takumi's aggressive state. In Conquest, fueled by nothing more than contempt for Corrin, he constantly tries to get them slain, including a Faceless ambush in the Woods of the Forlorn and telling the warring Hoshidans where they'll be. In one instance, a Faceless tries to attack Corrin, but it results in Lilith's demise instead; Iago remarks he never liked the flying rat anyway. His dislike reaches the point where he outright attacks Corrin at the end of the route in front of the Nohrian siblings, going against his king's orders. Manipulative and cruel, nobody approved of Iago's actions and even the peace-loving Corrin wanted him dead.
 * Iago later returns in Fire Emblem Warriors as one of King Oscar's generals where he takes command of a portion of Gristonne soldiers in their ongoing invasion of Aytolis. Iago tries to turn Hoshido and Nohr against each other once again by kidnapping Corrin and framing the other kingdom for doing so. When that fails, he resorts to brainwashing Corrin, as well as Xander and Ryoma in a spiteful attempt to have them kill their family and friends, but is later defeated and forced to flee.
 * Hans is a brutal and sadistic thug who was once a thief and a murderer brought to justice by Xander in the past and later recruited into Nohr's army by King Garon. When ordered by King Garon to test Corrin's abilities, Hans murdered a Hoshidan on what was mean to be a simple recon mission to initiate a conflict. Despite initiating the conflict as ordered, Hans continued to try and kill more Hoshidans for fun, abandoned the group during the conflict, and later on attacked Corrin on a bridge, needlessly trying to kill Gunter in the process. In the Birthright route, Hans gets promoted to a commander, and demands that his men fight against each other for real saying that he wants to see real blood. When he finds Corrin and the group, he orders his men to throw their lives away if it means weakening Corrin, and threatens to have King Garon kill the families of those who hesitate. In the Conquest route, when ordered to suppress a rebellion occurring in Cheve, Hans ignores the rebellion and decides to slaughter innocent villagers who took no part in it. He later gleefully kills Hoshidan prisoners who were promised to be spared if they surrendered. Hans is willing to do anything if it means he'll get ahead in life and while he claims to kill out of loyalty for King Garon, Hans only ever follows Garon's orders if it means he can be rewarded for what he loves doing. It's impossible to do anything but cheer and feel relieved when he finally gets killed.

Warriors

 * Fire Emblem Warriors has King Oskar of Gristonne. He seeks to revive the Chaos Dragon Velezark to claim his power for himself, and is all too willing to doom the entire multiverse to sate his own lust for power. He kicks off the game by orchestrating the invasion of the kingdom of Aytolis, and the kidnapping of Queen Yelena, to sacrifice to the Chaos Dragon. During his conquest, Oskar gains the assistance of fellow Complete Monsters Validar, Iago and Gharnef, who lead his kingdom's forces into battle during several chapters in the game. He's also shown to be ruthless and cold father who places his desires and plans above his own son Prince Darios, and is willing to kill him if he gets in his way. After the spirit of Velezark possesses the body of Darios, who at the time was in possession of the Shield of Flames, Oskar takes residence in Aytolis Castle, where preparations are made for Velezark's physical resurrection. Thankfully, he gets what's coming to him when he's killed by his own possessed son to resurrect Velezark, when the heroes foil his plans and rescue Queen Yelena. Remarkably, he himself has very little screen time compared to his fellow monsters, but boy does he make good use of it.
 * The Chaos Dragon himself, Velezark is the true mastermind behind the events of the game, and is essentially Grima 2.0. In the past, Velezark led his forces to attack the kingdom of Aytolis for no given reason, but was sealed away by the power of the Shield of Flames wielded by the Sacred Dragon. But sadly, this was not the end of the Chaos Dragon and his spirit eventually returned. In the present, Velezark is first seen trapping the Gristonne prince Darios inside the castle tower in the Fortified Citadel and possessing him before being found by the Aytolis siblings, Rowan and Lianna, and their allies from the three worlds. Then, after all of the Gleamstones were gathered and the Shield of Flame becomes fully powered up, Velezark, using Darios' body as a puppet, initiates his plan. Acting as a spy for King Oskar, he steals the Shield of Flames, and joins Oskar in preparing to sacrifice Queen Yelena to revive the evil dragon to his full power, though he makes the proposal that if the twins surrender their weapons, he will spare her. When they do so, he turns to kill her anyways purely out of spite, only to be stopped by Takumi, who predicted this outcome. With Yelena rescued, Velezark reveals that he had a back-up plan all along, and proceeds to kill Oskar instead, saying that all he needed was royal blood. With Oskar as the sacrifice in Yelena's place, Oskar's body is absorbed by the magic circle to fuel Velezark's power. After the twins defeat him, Darios fully regains control over himself and pleads for them to kill him before Velezark manifest itself from his body. When they refuse, Velezark separates himself from Darios' body, using the Gristonne prince's life force to materialize its physical form, regaining his full power. As Velezark is about to kill the twins, Darios sacrifices himself to save them and returns the Shield of Flames before falling victim to the collapsing castle, resulting in his death. Afterwards, Velezark escapes to the World Tree and opens several Outrealm Portals to different worlds, threatening to tear the entire multiverse apart should the twins fail to stop him.

Heroes

 * Surtr, the pyromaniac King of Muspell, expresses a lust for carnage and domination. He begins Book II invading the Kingdom of Nifl, and caps off the conquest by burning Fjorm's mother alive before her eyes. To oppose the Order of Heroes, Surtr forms an alliance with the Embla Empire, but quickly reveals his intent to burn the young Princess Veronica alive slowly and painfully in the Rite of Flames. Surtr tries to force an early surrender from Prince Alfonse by forcing the Order to choose between their lives and an innocent Askran village. Later, when Fjorm's older sister Gunnthra enlists the help of the Summoner and the Order to cull Surtr's invulnerable Muspellflame, he finds Gunnthra and proceeds to incinerate her in front of Fjorm, mocking the girl all the while. Showing no regard to even his own people, Surtr kept the village of his top soldier Helbindi, including his younger sister Menja, under the threat of a fiery death should he fail, a fate which unfortunately comes to pass. His boundless cruelty even extends to his daughters, who are treated as expendable tools he expects to obey his will and take every punishment for failure. Eventually betraying Veronica and even kidnapping the youngest princess of Nifl, Ylgr, Surtr plans to have them sacrificed to sustain his immortality. A sadistic and heartless excuse of a tyrant, Surtr provides no reason for his senseless and disgusting evil other than it being the blood right of a king.

Three Houses

 * Thales is the chief member of 'Those Who Slither in the Dark,' and a ruthless schemer dedicated to achieving the power of the gods. Approving ghastly experiments on multitudes of innocents to destroy their minds, Thales initiated a massacre of nobles to blame an innocent land, resulting in the near genocide of its people, while manipulating the war of the Flame Emperor in order to tear the country apart and destroy its people. Having his own forces kill those they can to revive the monstrous Nemesis and unleash him on the world, Thales even spitefully tries to nuke his own base and the last stronghold of his people to kill the heroes upon defeat.
 * Solon, Thales's mad scientist, is responsible for horrendous experiments on many innocent people, even children, to destroy them and twist them into monstrosities. Having murdered and replaced kind librarian Tomas to infiltrate the church of Seiros, Solon helps to manipulate the war, and is responsible for driving the people of Remire Village insane to see them rip one another apart, just for the sick satisfaction of it.
 * Cornelia is a power hungry politician and member of the Those Who Slither in the Dark, Cornelia takes place among the top figures in the Kingdom of Faerghus as a strong influence in the political scene. Using her position, Cornelia masterminds many of the most horrific moments in the game's history and current plot. Sought help by Patricia, the Queen of Faerghus, to help her reunite with her daughter, Cornelia uses this opportunity to help arrange a terrible incident that will leave great discord and terrible implications. With the help of her leader, the aforementioned Thales, Cornelia deployed their forces to attack the Royal Family of Faerghus along with a large number of knights and nobles as a smokescreen for Patricia to fake her death in hopes to see Edelgard. This was the Tragedy of Duscar which cause a horrible disturbance in the kingdom, with Cornelia taking central reigns and directing the blame towards the people of Duscar due to the attack happening near their lands. Faerghus believing her went to massacre the innocent Duscar people, taking the lives of everyone, even children. Thousands of people died without doing anything wrong, and the surviving members of the Duscar people were discriminated and abuse, all things Cornelia intended to create more dissonance. She even directed the blame to a number of other nobles including Christophe, the eldest son of Lord Lonato, due to knowing their deaths can be use to manipulate others in creating more chaos or for being potential threats.By the time the game takes place, the action of Cornelia has done a number to all the conflicts of the story. She started to create unrest among the politics in Faerghus to help her position. The worse is the the effects it has in Dimitri, haunting and destroying his sanity slowly due to witnessing the all the death and destruction in the Tragedy of Duscar, waking a mad beast who only wants to kill those who oppose him. This eventually lead to Dimitri go to war against Edelgard after finding out she was the Flame Emperor and her Adestrian Empire due to believing she was responsible for the tragedy. This was what Cornelia wanted, to drive Faerghus in a state that it would want to go to war with the Empire and create a bloody conflict.Her actions in the Azure Moon route is where she really shows her worse. During the 5 years that Byleth is in a coma, Dimitri's sanity gotten worse due to the toll of the war and Cornelia's corruption, turning him into a bloodthirsty tyrant. Planning to usurp Dimitri, she murders his uncle and frames him by claiming he wanted revenge believing his uncle had a role in the Tragedy of Duscar. After successfully implicating him and turning the powers of Faerghus in turning against him, she tried to have him executed and failed. Now taking the leadership of Faerghus, she made dealings with the Empire, essentially selling the kingdom out to the enemy. Now with full control, she uses the support of the empire to eliminate rebelling nobles, to drive the kingdom to her whims. Her end goal is the complete and utter destruction of the Kingdom of Faerghus. However with the help of a newly awoke Byleth, Dimitri was able to gather the loyalist of the kingdom and eliminate Cornelia, who in her last words reveal to Dimitri the significant role his adoptive mother Patricia had in the tragedy, and that she never truly loved him.

Tokyo Mirage Sessions ♯FE

 * Gharnef and his partner, the seemingly naive music producer Yatsufusa Hatanaka, are responsible for nearly all the bad things that happen in the game. After his master Gotoh of Khadein didn't choose Gharnef as the next sage due to the latter's lack of caring heart, Gharnef attempts to conquer the continent by reviving the Shadow Dragon Medeus by performing the "Opera of Shadow" and attempting to destroy his own world before being sealed away by the hero king Marth. Traversing to another dimension as a Mirage and meeting with Hatanaka, the duo are responsible for the event known as the "Great Disappearance", with Hatanaka letting Gharnef attack an Opera House while possessing the father of the aloof artist, Yashiro Tsurugi, in order to perform another "Opera of Shadow". Seemingly defeated at first, the duo then orchestrate several Mirage attacks across Tokyo in the present day, and it was soon revealed that both Gharnef and Hatanaka attempts to revive Medeus again by stealing Performa—a creative energy that people possess in their hearts—from innocent people while Hatanaka revels in the destruction that he will cause. Encountered by the heroes for the final time, the duo then stole the soul of the Hero King, and when the tables turn against them, Hatanaka then offers his soul to Gharnef to defeat the heroes. Despite his defeat, Gharnef then offers his own soul along with the Hero King's soul as a last resort to revive Medeus.