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Lux Arcadia

Voiced by: Mutsumi Tamura

Drag-Rides: Wyvern and Bahamut
Click here  for his crossdressed appearance as "Luno"

The protagonist whose actions form the basis of Undefeated Bahamut Chronicle. Lux is the former seventh prince of the Old Arcadia Empire. After the death of his mother, wanting to change the decadent Empire, he becomes the youngest Drag-Knight in order to have an audience with his estranged father the Emperor. When words failed, he plots with his older half-brother Fugil to bring the end of the Empire as peacefully as possible.

After the Empire's fall, under the amnesty of the current kingdom, he becomes the "Chore Prince" of the New Kingdom Atismata to do odd jobs under parole to pay a debt of about 1/5 of the nation's wealth. One day, when trying to retrieve a girl's bag from a cat, he falls through the roof of an all girl's academy's communal bath. He then saves a girl from some falling debris and ends up straddling on top of her. After some misunderstandings and fighting, Lux becomes the first male student of the Royal Knight Academy.


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    # — H 
  • 100% Adoration Rating: By Volume 12, the whole academy trusts him, much to the bafflement of those who still distrust him for his ancestors. In Volume 19, his accomplishments make him popular enough that the people of Atismata accept him as their temporary king.
  • Accidental Pervert: He occasionally gets in these situations with the main girls; from groping to seeing them under-clothed.
  • Ace Custom: His Wyvern is one. In anyone's hands, it's nothing more than clunky, heavy, impractical piece of machinery. In his hands however, it's an awesome machine that can go toe-to-toe against a Divine Drag Ride.
  • Ace Pilot: One of the best in the series and in nothing more than a quack Drag Ride; definitely a Plugger.
  • Affectionate Nickname: He has a few.
    • His childhood friend Philuffy calls him Lu-chan.
    • His classmate Tillfur calls him Lux-cchi.
  • Almighty Janitor: Despite losing his status as prince and becoming the new kingdom's errand boy, he's still one of the best pilots of the series. Gloriously averted at the end of the anime at least, where Lisha chooses him to be her knight. This is also averted in the light novel, where he acts as his country's Seven Dragon Paladin representative and later becomes the temporary king.
  • Attractive Bent-Gender: His disguise as "Luno" is a little bit too convincing.
  • "Awesome McCool" Name: Lux Arcadia, like Luke Skywalker, is the name you'd expect from a Space Opera hero.
  • Awesome Moment of Crowning: Downplayed. In Volume 19, he becomes king of Atismata for one year until the government can transition into a republic. This is fitting with the lesson he learned throughout the series: that he can't save everyone by himself, but he can guide others onto the correct path.
  • Badass Adorable: When he was only 12 years old, he annihilated 1200 strong men.
  • Batman Grabs a Gun: Subverted. Lux seriously considers killing Rosa in order to prevent any further atrocities from her, but the combination of Phi dissuading him and Rosa jeered at by an angry mob like he once was causes him to falter.
  • Battle Couple: With Lisesharte. She's been shown having the highest compatibality with him on the battlefield amongst the Battle Harem, hands down.
  • Because You Were Nice to Me: The reason he rushes out to rescue Krulcifer from Kreutzer, despite her drugging him to keep him out of the duel? She helped him with his homework, after a long, rough day of many, many odd jobs that he couldn't refuse.
  • Beware the Nice Ones: Meek, shy, amiable, and exceptionally patient and kind, but if you ever piss him off, may God have mercy on your soul.
  • Black Swords Are Better: The Sword Device for Bahamut.
  • Bully Hunter: The reason he got into a fight with the three "instructors" in Volume 2, is because they were bullying his underclassmen.
  • Bullying a Dragon: Ok, adversaries thinking they're superior to a teen wielding a drag-ride that looks like an unwieldy piece of junk, and provoking him makes sense. When that same teen pulls out Bahamut, showcasing that he's either the guy who single-handed took out 1200 hardened drag-ride veterans, or strong/skilled enough to actually beat that person, provoking him to fight you makes a lot less sense.
  • Butt-Monkey: Although Relie Aingram will bring her full authority to bear to aid and protect Lux, should the need arise, her favorite hobby is finding new and interesting ways to torment him, purely for her own pleasure. Starting by putting Lux and Philuffy in the same bedroom, and having them share a bath.
  • Cain and Abel: Subverted with his archnemesis and half-brother Fugil. He admits he was only pretending to be a member of Lux's generation in order to bring down the empire from within.
  • Charged Attack: <Reload on Fire> functions as this by charging time, which slows him down for 5 seconds and then speeding him up for 5 seconds. He can also apply this time compression to his allies' Divine Raiments to increase their destructive power.
  • Chick Magnet: About every girl in the academy has interest in him. Probably due to the fact that he is the only male student and that he is a Nice Guy.
  • Child Prodigy: Invented a lot of techniques the knights use at the age of 12, probably even earlier than that. While it's revealed Fugil actually invented these techniques, Lux was never taught these techniques directly and still reproduced them with minimal instruction.
  • Clueless Chick Magnet: Despite multiple girls explicitly telling him that they love him and kissing him, it just doesn't get through his head.
  • Covert Pervert: He is a healthy, heterosexual teenage boy surrounded by beautiful ladies, several of whom frequently flirt with him quite aggressively. Of course, he's going to notice.
  • Crippling Overspecialization:
    • The base for his Drag Ride is a Wyvern-type which means it's capable of flight. Problem is, most of it is covered with a lot of defense which heavily weighs him down. Doesn't stop him from being one of the best pilots.
    • Most of his training is focused on handling his Drag-Ride, but his ground combat skills aren't as good and he consistently struggles against fighting opponents on foot. In Volume 20 Chapter 5, he defeats Yoruka in a Drag-Ride duel in a matter of seconds, but loses in hand-to-hand combat. In the epilogue, the narration states he eventually improves enough to defeat her in ground combat.
  • Crouching Moron, Hidden Badass: Lampshaded by his sister. Oblivious towards his surroundings, however give him a Drag-Ride and he'll wreck you.
  • Curtains Match the Window: He has silver-grey hair and eyes due to being part of the Arcadia imperial family.
  • Dangerous Forbidden Technique: The aptly named "Overlimit" unlocked by Lisesharte prior to exploring the ruins in episode 8 is this. It gives Lux a significant boost in power with Bahamut, but in the worst case scenario could kill him.
  • Dark and Troubled Past: His mom died because no one helped him thanks to being part of the royalty, they even threw stones, and cursed at him. His father the emperor didn't listen to him because his ideals were different. Immediately after that, the same Imperial court took his friend Philuffy away to perform horrific experiments on, willing to wreck the Empire's entire economy in the process by angering a very influential merchant house. He is unable is save Philuffy and breaks down to the point where Fugil has to erase his memory of the incident to continue the coup. During the coup, his involvement is leaked to the emperor, who kidnaps Airi in order to force Lux to stand down. Finally, he was betrayed by Fugil who tries to tempt him into becoming The Unfettered, defeats him, brutally deconstructs his ideals, and manipulates his memory again so that he'll be a useful pawn in the future. And for the next five years, he has forced to take on errands as part of paying off a debt equivalent to 1/5 of the national budget, and should he be simply accused of wrongdoing, the debt could simply transfer over to his younger, frailer sister.
  • Dark Is Not Evil: Design wise, Bahamut looks Red and Black and Evil All Over. but it's piloted by Lux of all people. Of course, it used to belong to his far eviler half-brother.
  • Deliberate Injury Gambit: His technique "Recoil Burst" works in this fashion. To use it, he deliberately lets Bahamut, or his "quack" Wyvern,enter "Rampage" state, which is where numerous energy attacks trigger an overload. Just before the overload causes catastrophic failure, he unleashes all the acumulated energy in a single high-powered shot. The only way to avoid it is to teleport out of the way. Even divine Drag-rides can't survive a direct hit.
  • Determinator: When the readers are first introduced to him, he's chasing after a cat through the entire town. It goes on from there.
  • Difficult, but Awesome: Bahamut is one hell of an awesome machine and he can crank out moves that can destroy landscapes easily. The problem? It's a huge energy hog that drains him after using it and ends up in a coma that could last for a few days to a whole week.The energy consumption, along with the charging period of <Reload On Fire>, make Bahamut Awesome, but Impractical for inexperienced wielders. Due to Bahamut's weaknesses, Lux has to learn to read his opponents accurately so he can make the most of Bahamut's limited use time, which is why he uses an unwieldy customized Wyvern to train himself.
  • Disguised in Drag: Originally Dragged into Drag by the Triad in episode 6, Lux dons a female disguise named "Luno" while spending time with Celestia, much to the Triad's delight, so as not to trigger her perceived hatred of men, a perception compounded by her vehement insistence that he be expelled from the academy near the end of episode 6.
  • Dragged into Drag: The Triad, requesting his aid in fighting a dangerous intruder to the academy in episode 6 does this to him. Nobody realizes it's him because he's just so very attractive as a girl. In the later volumes, he gets dragged into wearing a maid outfit.
  • Dude, Where's My Respect?: Lux is the reason the Kingdom exists, and could snap its entire military over his knee with Bahamut. They put him in a collar and call him "Chore Prince". Good thing he's such a Nice Guy.
  • Experienced Protagonist: Here we have the legendary Black Hero that once defeated the Arcadia Empire. By definition, that makes him the best warrior of his generation, but he keeps that under wraps to prevent political backlash.
  • Fake Memories: During the coup d'etat led by Count Atismata, Lux used the Divine Drag-Ride Bahamut to defeat the Old Empire's 1,200 Drag-Rides. Unfortunately for him, Fugil betrayed him and the plan by killing the imperial court. This turns out to be a fake memory planted by Ouroboros. What actually happened was that the Old Empire had successfully crushed the coup d'état (thanks to information from Raffi Atismata), then the emperor took Airi hostage to try to force Lux to surrender. Fugil intervened, rescuing Airi and killing the empire's army and court. However, Lux refused to go along with his plans, so Fugil altered his memories.
  • Fake Ultimate Hero: Downplayed when it comes to his reputation as the Black Hero. The narration speculates that Fugil used <Endless> to make Lux seem like the one who did the heavy lifting during the revolution while downplaying his own role. However, by Volume 16, Lux's Baptism and training allow him to narrowly defeat a Sacred Eclipse clone of Fugil, showing he can live up to his reputation. Additionally, Aeril and Alma consider him to be the more Ideal Hero of the two, since he actually cares about the people around him rather than considering them expendable for his ideals.
  • Feel No Pain: He can apply <Reload On Fire> on himself to dull his pain for a few seconds. Unfortunately, this causes the pain to be multiplied after the charging effect ends.
  • First-Episode Twist: Lux is the "Black Hero". Trying to discuss this series without spoiling that part is pretty hard.
  • The Gift: Females on average have better compatibility with Drag-Rides, though Lux is one of the few exceptions to this statistic, thus causing a nearly inevitable Battle Harem situation when the headmaster finds out about him. At least part of this is due to Baptism, though.
  • Henpecked Husband: For all intents and purposes. Outside the battlefield, where his vastly superior experience, abilities, and tactics allows him to take command, he's being constantly dragged around by his Battle Harem, among others. This is considerably more justified than most cases, as due to the terms of his Indentured Servitude, he's effectively their slave, and they know it.
  • The Hero: The main character, the pilot of the titular Drag-Ride and the center of the Battle Harem.
  • Hour of Power: Bahamut is an incredible machine even compared to other Divine Drag-Rides, but has horrible energy efficiency even for someone with good Drag-Ride compatibility and Baptism like Lux. He can therefore only use it for about 10 minutes.
  • Humble Hero: He's not looking for fame, glory, riches, or women (although he could use the riches to get out of his Indentured Servitude), all he cares about is protecting the citizens and keeping his friends happy and safe. As a result, he gets three out of the four things listed, fame, glory, and women.
  • I'm Not a Hero, I'm...: Combined with Badass Boast while rescuing Lisasharte from Velvet in both the manga and light novel. This comes full-circle in Volume 19, where he states that no one can become a perfect hero and save the world, but one can still live in a way that inspires others to do good.
    "I am not a hero. I’m the weakest Drag-Knight who destroyed the Empire."
  • Indentured Servitude: Since the fall of the Old Arcadia Empire, under the amnesty of the New Kingdom of Atismata, he becomes the Kingdom's "Chore Prince" to pay a debt equal to 1/5 of the nation's wealth doing odd-jobs. Even after becoming a student of the academy, he is still a "Chore Prince" taking requests from the girls in the academy. His classmate Tillfur even notes that it would help pay the debt faster since they were all noble ladies and are very rich. Being the "Chore Prince" under amnesty also means he is protected by the Kingdom from assassination attempts by either those who still harbor deep resentment toward the Empire or Empire loyalists seeking revenge against him for destroying the Empire. As of Volume 16's epilogue, he is no longer an indentured servant to the kingdom.

    I — Z 
  • Ineffectual Loner: When he realizes Queen Raffi sided with Fugil and is using <Endless> to maintain her power, Lux decides not to involve his friends in his secret rebellion against Raffi. This works out poorly for him, since Raffi brainwashes them further under his nose and exhausts him by sending his friends to fight him one by one. Later on, he admits he was Not So Different from Fugil in trying to become a hero by himself.
  • I Owe You My Life: To Philuffy's family. Despite being of the hated royal blood, Philuffy took him in without prejudice. He would repay the favor, or at least try, when she was taken by The Empire to be experimented on. The Emperor just barely granted her mother an audience and only because she was of a very important merchant house, and even then turned down her pleas to free the child.
  • Knight in Sour Armor: Heavily believes in an ideal world, but is constantly plagued by a lot of betrayal and deceit.
  • Lady and Knight: The White Knight to four different Bright Ladies: Lisesharte, Krulcifer, Philuffy and Celestia. Ironically enough, he is also the Bright Lord to Yoruka’s Black Knight.
  • Laser-Guided Amnesia: After the coup, he attempts to duel Fugil and loses, causing him to lose his memories of the duel and of Phi's fate at the hands of the empire.
  • Laser-Guided Karma: Because he stood up for Phillufy, she took him in when he had nowhere else to go.
  • Light Is Good: Literally, because Lux means "light" in Latin.
  • Lady and Knight: The White Knight, while Lisesharte, Krulcifer, Philiffy and Celestia are the Bright Ladies. Ironically enough, he is the Bright Lord to Yoruka’s Black Knight.
  • Lover Tug-of-War: Is the victim of this in episode 6, caught between Krulcifer and Lisesharte. Unsurprisingly, episode 12 has all the other main characters joing the tug of war, including Yoruka.
  • Marry Them All: Starting from Volume 15, Lux has confessed to four of the girls of his harem, but due to the resets they have no memory until the events of volume 18. Then after, Lux promises he will never stop loving them.
  • Mind over Matter: Bahamut has a special Armament, "Linker Pulse," which can create a force field to control an object's trajectory.
  • My God, What Have I Done?: When Sacred Eclipse transforms into someone he feels guilty about, she transforms into Lisha, who claims Lux killed her. Due to his Laser-Guided Amnesia, Lux doesn't know what this means, though Sacred Eclipse's transformation still succeeds in making him hesitate.
  • Nerves of Steel: Despite being flustered by various ecchi situations, he can be surprisingly composed in battle. When Queen Raffi expresses killing intent towards him in order to test if he's affected by <Endless>, he manages to keep his cool to avoid giving himself away.
  • New Transfer Student: In two different ways. First, when he's ordered, under the terms of his amnesty, to attend the academy, and second while playing the role of "Luno."
  • Nice Guy: There's nothing to hate about Lux. He's just so unfailingly polite and honest that at least six girls fell in love with him, not to mention he became an instant celebrity at school.
  • The One Guy: Due to circumstances beyond his control and his unusually high Drag-Ride compatibility, he's the only male student at the previously all-female Drag Ride training academy. The academy's dean, Relie Aingram, does not miss any and every opportunity to exploit this for her own pleasure. This is humorously deconstructed in one of the side stories, where he laments that being in an all-girls school makes it hard for him to make male friends other than Greifer and Coral. And the latter isn't really a guy.
  • One-Man Army: When using Bahamut. Ask the 1200 men during the coup. However, this mainly applies when his opponents are weaker Abysses or Red Shirts who use mass-produced Drag-rides. Opponents who use Divine Drag-rides or Elixir tend to give him more trouble in single-combat.
  • Parental Abandonment: Mom died thanks to an accident and no one helping them because they're "part of the corrupt royalty" while dad chased him away, and his dad was later killed by his own older brother.
  • Paralyzing Fear of Sexuality: Usually played for laughs. When any of the girls in his harem actively pursue him sexually, he freaks out. One illustration has his entire harem, including Lisesharte, sleeping comfortably around him in elegant, erotic attire and he's right in the middle, more terrified than a long-tailed cat in a room full of rocking chairs.
  • Red and Black and Evil All Over: Subverted, because he uses the Bahamut for good.
  • Red Baron: "Weakest Undefeated" sounds like a sissy nickname, until his adversaries realize that he could have literally kicked their asses if he really wanted to. To clarify via its backstory, Lux earned this title by fighting tournament opponents to a draw, never winning but also never losing. The thing is, Lux never cared about the fame; he only participated in tournament matches to train himself with Bahamut's weight and agility. His modified Wyvern, as mentioned by Lisha, had its armor reinforced in odd and incongruous places, which was secretly meant to mimic Bahamut's weight distribution. Lux was using competitive, official ranked battles as glorified tutorial sessions. Even when he's just practicing, Lux's skill is such that he inadvertently created a reputation for himself.
  • Replacement Goldfish: He serves as this for Yoruka who happily admits how similar he is to her deceased younger brother.
  • Rescue Romance: He's earned his Battle Harem by coming to the rescue of each and every one of the girls in it. The only exceptions are when he went up against Saniya, the sadistic, Ambiguously Brown, False Friend Bitch in Sheep's Clothing, and Hayes, the Axe-Crazy Omnicidal Maniac both of whom have been shown beyond any shadow of doubt that they neither want nor deserve redemption.
  • Royals Who Actually Do Something: Though he does question it sometimes whether he's doing the right thing or not.
  • Save the Villain:
    • During the coup, he wanted to spare the imperial court, but Fugil killed them. He doesn't remember due to memory erasure, but he went as far as fighting Fugil in an attempt to save them, despite how they took his sister hostage and crushed the rebellion.
    • In Volume 19, he attempts to grab Fugil's hand when the latter is about to fall off Ouroboros. Unfortunately, Fugil crumbles into dust due to receiving a fatal wound in their duel, though this gesture does restore his faith in humanity to some extent.
  • Secret Identity: Him being the "Black Hero" who during the coup helped defeated the Empire's 1,200 Drag-Rides is a secret to the citizens of the Kingdom.
  • Secretly Selfish: Some antagonists, like Fugil and Singlen, accuse him of trying to be a self-sacrificing Ideal Hero because he wants to gain the affection that he was denied in his childhood. This causes him difficulty in Volume 15 when Fugil changes the world to give him the affection and peace that he always wanted, making it so that Lux struggles to realize that something is wrong with the situation.
  • Shrinking Violet: Celestia thinks "Luno" is one.
  • Sins of Our Fathers: He's stuck with paying 1/5 of the national debt as penance for his father's actions. Additionally, the Lords and Xfer clan distrust him for being a descendent of Arcadia's traitor branch.
  • Sobriquet Sex Switch: When Dragged into Drag in order to interact with Celestia, Lux goes by the alias "Luno".
  • Surpassed the Teacher: Averted. While he does get close to Fugil in terms of skill and catches him by surprise a few times, his former teacher still manages to turn the situation in his favor with tactics that Lux wouldn't have thought of.
  • Stock Light-Novel Hero: Lux is the legendary Black Hero that destroyed his own empire to save innocent people, is the only guy in an all-girls school (which means an Unwanted Harem), saves the newly formed kingdom (ruled by one of the girls in the aforementioned harem) on a regular basis and, along with his sister and Aeril, is the only good person in family of hideous and pathetic excuses for human beings.
  • Sword Beam: Recoil Burst.
  • Sympathy for the Devil: Downplayed. As much as he wanted to kill Rosa, he felt sorry for her being attacked by an angry mob like he and his mother were in his childhood.
  • Taking the Bullet:
    • When he comes to Lishesharte's aid, he takes a blow from Velvet Barth in his "quack" wyvern. In the light novel and anime, his machine loses an arm. In the manga, his wyvern gets blasted to pieces.
    • In Volume 11, he takes a fatal attack from Singlen in order to save Yoruka. Fortunately, Sacred Eclipse decided to revive him with Elixir.
  • Technical Pacifist: He never fights to kill. His little stunt as the Black Hero? He did that with zero casualties. Played with in his final battle with Fugil. He unleashes a Quick Draw on Fugil and thought the latter blocked it, but Fugil's Bahamut gave out at the last second and the attack dealt a fatal blow, despite Lux's attempt to stop it.
  • The Greatest Story Never Told: Otherwise if they reveal that he's the Black Hero, mass panic would ensue. Not to mention, knowledge that the Old Empire's own Prince was the one responsible for its destruction would undermine the New Kingdom's credibility, as people would speculate that it was not the product of revolution at all, but rather a convincingly staged puppet government.
  • Took a Level in Badass: In Volume 16 Chapter 5, Lux's body finally adjusts to the Baptism he received during the Avalon trials, giving him improved physical strength and allowing him to overcome a Sacred Eclipse clone of Fugil.
  • Training from Hell: He treats his fights with almost anybody as training in his customized, quack job Wyvern as nothing more than training to fully control Bahamut. The reason he goes this far is because of suppressed memories of Fugil using Ouroboros!Bahamut, causing him to realize that he needs to train hard to catch up.
  • Underestimating Badassery: He's usually on both ends of this trope. He usually receives this trope because of his nickname "Weakest Undefeated" when it turns out the only reason why he doesn't even attack once is because he considers a real life-or-death fight as nothing more than Training from Hell to operate Bahamut better. He's also on the other end when he sometimes underestimates the girls only to get his ass kicked. Just ask him after underestimating Krulcifer and Philuffy about that.
  • The Unfavorite: During a flashback of the coup, the Emperor calls both him and Airi failures.
  • Unwanted Harem: Lux earns the affections of five different girls; all of them Action Girls equipped with Powered Armor and hailing from noble families. While Lux is not entirely opposed to the idea of romance, he feels he should focus on providing for his little sister, who is implied to see Lux as more than just a brother. Not helping matters is that the teacher's headmistress and Lux's fellow students enjoy playing matchmaker between him and the girls.
  • Unwitting Pawn: The emperor knew all along that Lux was helping Count Atismata and intentionally overlooked his son's actions to easily find the rebels.
  • The Worf Effect: He loses to Singlen in a contest of pure skill in Volume 6, where both duel using weak mass-produced Drag-rides. The only good news is that Lux managed to learn two of Singlen's difficult skills to defeat Dilwy.
  • Wrecked Weapon:
    • In Volume 3, he inflicts this on Saniya and several third years by forming a force field around his weapon and striking the weak point of their own.
    • When the fake Fugil breaks Lux's blade in half, the latter counters by shortening the distance between the two to the point where his shorter blade is more advantageous than his opponent's longer blade.
  • You Have Outlived Your Usefulness: Fugil claims Count Atismata would have killed Lux and Airi in order to prevent the public from realizing he was backed by an Arcadia.

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