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Main Characters
In General
- Blonde, Brunette, Redhead: The initial trio are the black-haired Seika, the blonde Yifa, and the redhead Amyu.
- Four-Temperament Ensemble: Seika is the laid-back and calm Phlegmatic, Yifa is the kind and sociable Sanguine, Amyu is the energetic and impulsive Choleric, Mabel is the quiet and moody Melancholic.
- Town Girls: The three main girls are the gentle and girly Yifa (Femme), the tomboyish and brash Amyu (Butch), and the calm and reserved Mabel (Neither).
Seika Lamprogue
Voiced by: Yumiri Hanamori, Yuichiro Umehara (as Haruyoshi) (Japanese), Marianne Bray, Jim Foronda (as Haruyoshi) (English)
Click here to see his past life appearance as Haruyoshi
Formerly Haruyoshi Kuga, the strongest onmyōji in his world, upon his death he performed a spell that let him reincarnate in another world. Now reborn as Seika Lamprogue, he now seeks a happy life in his new world.
- Affectionate Gesture to the Head: He often shows affection for Yifa by petting her head.
- Anger Born of Worry: In the Astelia Kingdom arc, he scolds Yifa for freezing during the attack of the guardian dragon when she is capable of defending herself.
- Anti-Anti-Christ: The Demon emissaries are horrified to discover that their prophesized Demon King who is meant to lead them is actually Seika and he's on the humans' side.
- Beware the Nice Ones: He's a very polite and benevolent boy at heart. If anyone becomes a danger to him and his friends, however, he will crush them without mercy.
- The Champion: Amyu is the Hero, while Seika is doing whatever it takes to keep her safe until she becomes known as the strongest in the world. It later gets deconstructed; the Hero can only become the strongest by overcoming powerful enemies, but due to Seika defeating all of the dangerous enemies targeting Amyu himself, she won't reach the power level she needs to become a Hero that can protect the country from the demon army and the country's higher-ups decide it's best to kill Amyu before her very existence starts a war with the demons.
- Dark Is Not Evil: Downplayed. His black hair and eyes make him stand out in his new world, and many of his summoned ayakashi are very monstruous. He's even revealed to be the current Demon King. While he's very ruthless and devious, Seika is far from evil and only wants to protect friends.
- Dissonant Serenity: He's able to brutally kill his enemies with a nonchalant smile.
- Dragon Rider: He can summon a flying Eastern dragon that he sometimes uses as transportation. Later on, he also befriends the Astelia Kingdom's guardian dragon and she allows him to take a ride on her head.
- Experienced Protagonist: He was already the most powerful onmyōji in his original world, and still has all of his knowledge and powers in his new world.
- Good Is Not Soft: He brutally murders anyone who tries to harm him and those he cares about. While he may act ruthless and even cruel towards his enemies, he's not heartless and does feel sympathy for the people he kills in painful ways, but he can't afford to be soft when that got him killed in his past life.
- Guile Hero: Since his lack of cleverness was what lead him to his downfall in his past life, Seika uses very cunning and calculative methods to achieve his goals in his new life.
- The Lancer: Despite being the main character, he chooses to be this to Amyu, as he claims he has no interest in usurping her role as The Hero, and his carefree, lackadaisical demeanor makes him a foil to her.
- Lonely Rich Kid: Subverted. Because he's believed to be the son of a mistress, Seika was ignored by his parents, older brothers and most of the servants at the mansion. Despite this, he never felt sad about being isolated because he only wanted to focus on his studies and he had Yifa to keep him company.
- Maou the Demon King: Unbeknownst to him, he's the current Demon King and the Hero Amyu's destined enemy.
- Mistaken for Romance: When Seika expresses interest in becoming closer to Amyu, Yifa mistakes Seika's intentions as romantic. Actually, he doesn't have any attraction for Amyu and just wants to help her become the World's Best Warrior.
- Nephewism: Everyone thinks Blaze Lamprogue is Seika's father, but he's actually Seika's paternal uncle who adopted him.
- Never Be Hurt Again: In his previous life, he was betrayed by everyone and killed by his favorite student. He doesn't want to trust or get too attached to anyone in his new life in case he's betrayed again.
- No Social Skills: In both his past and current lives, he dedicated all his time to honing his own skills. When he wants to befriend Amyu, he realizes he has no idea of how to do that because he never made a friend before.
- Nominal Hero: His only goal in his current life is obtaining happiness for himself, and for that he needs to protect himself and his closest friends from being used and/or killed like he was in his previous life. He's all too willing to mercilessly kill whoever makes themself into an enemy of him and his friends, no matter if they are demons or humans.
- Oblivious to His Own Description: When he asks Yifa what she wants in a man, she gives him a list of all the good traits that she likes about him. Seika still doesn't get that she's talking about him and just advises to not have such high standards for a partner.
- Oblivious to Love: Even though Yuki and Amyu directly tell him Yifa has a crush on him, Seika doesn't believe it and continues to think of her as family.
- One-Man Army: He can annihilate an army of armed soldiers within seconds.
- Pay Evil unto Evil: He frequently deals with assassins by killing them in gruesome ways, like feeding them to his Ayakashi familiars.
- Reincarnate in Another World: In his previous life, he was an onmyōji from feudal Japan and when he was killed by his own student, he used a spell to reincarnate in another world.
- Royal Bastard: He's believed to be the son of the noble Blaze Lamprogue and a mistress. In actuality, his real father is Blaze's brother Gilbert who disappeared in demon territory. Blaze has long suspected Seika's mother was a demoness.
- Stock Light-Novel Hero: A different take on the archetype. Seika is a Japanese man who got reincarnated in a world of magic, except he wasn't an ordinary person at all; he was the strongest onmyōji in his original world. Since he was already overpowered even before reincarnating, his knowledge and experience with onmyōdō make him the World's Strongest Man... But there's the problem that he doesn't want the title of the strongest because him being too powerful is the whole reason why he was killed in his previous life. Instead, he wants to go under the radar and support the person who is destined to become the other world's Hero.
- Summon Magic: He has a Pocket Dimension from which he can summon youkai that he tamed in his past life.
- Vicariously Ambitious: His goal is making Amyu into the World's Best Warrior so he can live peacefully under her shadow.
- Weaksauce Weakness: His only known weakness is traveling by carriage, as it causes his motion sickness.
- Wrong Context Magic: He is unable to use normal magic, but he does have exorcism magic from his old world, which operates differently.
Yifa
Voiced by: Azumi Waki (Japanese), Leo Matthews (English)
Seika's servant.
- Childhood Friend Romance: She grew up together with Seika at the Lamprogue mansion and has a big crush on him, but it's unrequited because Seika insists she's just like family to him.
- First Friend: She's the first friend Seika made after reincarnating.
- Hair of Gold, Heart of Gold: She's a sweet girl with long blonde hair.
- Happiness in Slavery: She's happy to be nothing more than Seika's servant, as she has a huge crush on him.
- Hired Help as Family: Yifa is Seika's servant, but Seika thinks of her as family more than any of his blood relatives in his new life because she always treated him kindly and didn't care about his status as an illegitimate child.
- Meido: From a young age, she worked as a maid at the Lamprogue mansion.
- Nice Girl: She's very gentle and caring.
- Ring of Power: Seika gives her a magic item in the form of a ring that helps her have better control over elemental spirits.
- Single-Target Sexuality: She has no romantic interest in anyone but Seika.
- Single Woman Seeks Good Man: She loves Seika because he has always been kind, caring and protective of her despite her status as a servant.
- Undying Loyalty: She is utterly loyal to Seika. This is best exemplified when Cecilio tried to force her to sign a contract that will liberate her from serving Seika, which she ultimately refuses.
- Uneven Hybrid: She's descended from elves, explaining why she can see and control elemental spirits.
- Wrong Context Magic: A much more downplayed example compared to Seika, but still present. Yifa has very little magic power, but she gets similar results by commanding elemental spirits.
Amyu
Voiced by: Nene Hieda (Japanese), Luci Christian (English)
The destined Hero and most powerful student at their school.
- The Ace: She's the top student in the academy and has extremely high magical power.
- Blood Knight: She lives for battle.
- Boyish Short Hair: She's a very tomboyish girl with short hair.
- The Chosen One: She is the hero destined to one day defeat a Demon King and save the world. As such, she's the only one who can wield all four types of elemental magic.
- Covert Pervert: When she isn't being a combat junkie, she reveals herself to have an absolutely filthy mind. She's gone on record that Seika's refusal to get intimate with Yifa to be an absolute waste.
- Cute Little Fangs: One of her fangs sticks out when she speaks, which reflects her energetic personality.
- Fiery Redhead: She's a redhead with a feisty personality.
- Heroes Prefer Swords: She's one who will become the Hero and her preferred weapon is a sword.
- Identical Stranger: When Seika first met her, he noted that except for her hair color, she bore a striking resemblance to the former student who killed him in his last life.
- It Sucks to Be the Chosen One: Because she's the Hero, the demon race keeps sending assassins after her. Luckily for her, Seika deals with them before they can find her. Eventually, the problems get more complicated because the existence of the Hero threatens the current power balance between humans and demons, so both sides decide it's better for Amyu to die before a war breaks out. Amyu is arrested under false charges, but Seika breaks her out of prison before the kingdom can have her executed.
- Magic Knight: She's highly trained in both magic and swordfighting.
- Master of All: She excels in all the six types of elemental magic.
- Modesty Shorts: She wears a pair of shorts underneath her uniform.
- Reincarnation-Identifying Trait: Her red hair is the trait that identifies her as the newest reincarnation of the legendary Hero.
- Significant Green-Eyed Redhead: Her green eyes and red hair highlight her importance as the Hero.
- Stocking Filler: She wears stockings with suspenders.
Mabel Crane
Voiced by: Akari Kitou (Japanese), Marisa Duran (English)
A strange "second Hero" who showed up at the school one day for a tournament.
- Adopted into Royalty: She was adopted by the Baron Crane.
- Book Dumb: After the tournament, Seika and the others spend lots of time tutoring Mabel. According to Seika, she can't even pass the written portion of the entrance exam. She defends herself by pointing out she never really had to study much during her time being trained as a Tyke Bomb.
- Fake Ultimate Hero: She was intended to pose as the Hero and die in the tournament to trick the demons into thinking the real Hero had been killed. Thanks to Seika's intervention, however, she survived.
- Glacier Waif: She's a young girl of average size and her preferred weapon is a massive battle axe bigger than she is.
- Gravity Master: She uses Gravity Magic in combat. Usually at the moment of impact to significantly increase the damage of her attacks.
- Heroes Prefer Swords: Intentionally invoked by Mabel. During her participation in the tournament as the decoy hero, she would use two sabers as well as a Great Sword on her back.
Lamprogue Household
Blaze Lamprogue
Voiced by: Show Hayami (Japanese), Mike Smith (English)
The patriarch of the Lamprogue family. Seika believes him to be his father, but he's really his paternal uncle.
- Family Relationship Switcheroo: He told everyone that Seika is his illegitimate son, but Seika is really his nephew.
Gly Lamprogue
Voiced by: Yūto Uemura, Riho Sugiyama [child] (Japanese), James Marler, Naya Moreno [child] (English)
Seika's older brother.
- Big Brother Bully: He harasses Seika for his lack of magical talent at the start of the story but grows out of this after spending time in the army.
- Brilliant, but Lazy: He technically has more talent for magic than Seika, but unlike Seika, he never put effort into training himself and went to fool around with the wrong crowd at the town. This is one of the reasons why his father easily decided to send Seika to the Wizarding School instead of him.
- Combat Pragmatist: During his fight with Amyu, he pretends to cast a spell to make her step back and give him an opening to attack. When she tries to reproach they agreed to not use magic, he tells her he didn't actually cast any spell.
- Jerkass: He's a big jerk who is too full of himself. He insulted Seika all the time and tried to sexually harass Yifa.
- Sibling Yin-Yang: Unlike his Nice Guy older brother Luft, Gly is an arrogant Jerkass who hates Seika.
- Took a Level in Kindness: He becomes significantly more levelheaded and reasonable after spending a year in the military academy. He no longer insults or tries to hit Seika unprovoked and acts a lot more civil in general.
Luft Lamprogue
Voiced by: Takeo Ōtsuka, Marie Miyake [child] (Japanese), Ryan Negron, Victoria Vitti [child] (English)
Seika's oldest brother.
- Big Brother Instinct: He's a Nice Guy who tries to protect both his brothers from mistreatment, shielding Seika from Gyu's bullying and asking Seika to go easy on Gyu during their Wizard Duel.
- Nice Guy: He's a very polite and well-mannered guy.
- Sibling Yin-Yang: Unlike his Jerkass younger brother Gly, Luft is a Nice Guy who is supportive of Seika.
Ayakashi
Yuki
Voiced by: Yui Ogura (Japanese), Lisette Monique Diaz (English)
Click here to see her animal form
A kudagitsune that Seika made into his familiar in his past life.
- Asian Fox Spirit: She's a kudagitsune, a small fox-like Ayakashi.
- Familiar: She became contracted to Seika in his previous life and remains his loyal Ayakashi companion in his new life.
- Head Pet: Since she hates being trapped inside Seika's Pocket Dimension, she usually stays in fox form and hides in his hair.
- Hime Cut: When in human form, Yuki is a kimono-clad girl with straight bangs, waist-length sidelocks, and ankle-length hair.
- Mystical White Hair: She's a kudagitsune whose human form is a girl with long silver hair.
- Pointy Ears: Her human form is a girl with pointed ears.
Satori
Voiced by: Ryūsei Nakao (Japanese), Monica Rial (English)
A mind-reading simian ayakashi.
- Telepathy: It has the power to read minds, making it perfect for interrogations.
White Snake
A giant snake ayakashi.
- Eye Scream: Its two eyes are sewn shut.
- Snakes Are Sinister: The snake can kill its targets with a gaze or it just eats them alive. Seika also mentions the snake was born of human hate.
- Third Eye: Seika explains that the white snake has a parietal eye that can kill anyone who stares at it.
Lodonea Magic Academy
Principal
Voiced by: Rikako Aikawa (Japanese), Casey Casper (English)
The principal of Lodonea Magic Academy. She's a dwarf who has lived for many centuries.
- Long-Lived: Being a dwarf gives a much longer lifespan than humans. She says she stopped counting her own age when she was 300 years old.
- Miniature Senior Citizens: She's very short because she's both a dwarf and very ancient.
Cordell
Voiced by: Kenji Akabane (Japanese), Jan Aponte (English)
A teacher working at the magic academy. He is really a spy of the demons.
- Bitch in Sheep's Clothing: He made himself look sheepish and harmless when working as a teacher, but his true goal was assassinating Amyu.
- Hoist by His Own Petard: He attempts to assassinate Amyu with a demon blood curse. Seika uses a substitute talisman to reflect Amyu's curse back on Cordell, killing him.
- Inhuman Eye Concealers: He wears Opaque Nerd Glasses to hide his red eyes.
- The Mole: He's human and works at a magic school for humans, but he's secretly working for demons and his mission was to assassinate Amyu.
- Red Eyes, Take Warning: When Seika exposes him as an assassin working for demons, Cordell reveals his red eyes along with his evil nature.
Rugroc Merchants' Association
Kyle
Voiced by: Yoshitsugu Matsuoka (Japanese), Kyle Phillips (English)
Mabel's older brother.
- Brainwashed and Crazy: During his training, his brain was engraved with magic to make him a perfect soldier so that he would kill all of his opponents in the tournament and then kill the fake Hero, Mabel, in the finals.
- Family Eye Resemblance: Seika can figure out he's Mabel's brother because they have the same eye color.
- Gravity Master: Like his sister, Kyle is specialized in gravity magic.
- Last Request: Before he dies, he asks Seika to apologize to Mabel on his behalf, since he felt bad for breaking her clover hairpin.
- Magical Eye: He has a cursed Evil Eye that paralyzes his targets, leaving them defenseless for him to kill them instantly.
- Mercy Kill Arrangement: Before he underwent the surgery that turned him into a killing machine, Kyle asked Mabel to put him out of his misery if he stopped being himself.
- White Hair, Black Heart: He has silver hair and the brainwashing has turned him into an emotionless killing machine.
- You Have Failed Me: After Seika defeats him, a curse from the merchants kills Kyle for his failure.
Urdweit Empire
Fiona Urd Alegreif
Voiced by: Kaede Hondo (Japanese)
The Holy Princess of the Urdweit Empire. She is the daughter of the emperor and the Oracle Priestess.
- Cloudcuckoolander: She randomly speaks of wanting to fly if she gets reincarnated.
- Flowers of Femininity: When dressed as a princess, she wears a headband with a white flower decoration.
- Formal Characters Use Keigo: In the original Japanese, Fiona always speaks in keigo to emphasize her position as a princess.
- Seer: She has the gift of foresight.
- Smart People Play Chess: She plays chess with Seika, as a way to show she likes to scheme as much as he does.
- Superpowerful Genetics: She inherited the ability to see the future from her mother, the Oracle Priestess.
- True Blue Femininity: She's a blue-haired princess wearing a mostly blue dress.
Astelia Kingdom
Cecilio Astilia
Voiced by: Gakuto Kajiwara (Japanese), Justin Briner (English)
Prince of the neighboring Astelia Kingdom.
- Classy Cravat: His cravat shows his royal position as a prince.
- Entitled to Have You: Because he's a prince, he thinks he can come and buy Yifa to make her his wife, regardless of her own wishes.
- Glory Seeker: He only wants to kill his kingdom's guardian dragon for the glory and fame it would give him. Even after he learns the dragon presents no danger to the kingdom, he still wants it killed to strengthen his chance of becoming king.
- Love at First Sight: From the moment he lays eyes on Yifa, he decides he wants her as a wife and proposes to her right away.
- Prince Charmless: He may be a prince, but he's just an idiotic and immature brat who only cares about getting what he wants. Once Seika realizes what kind of awful person Cecilio really is, he decides he can never let Yifa become the wife of someone as disgusting as him.
- The Victim Must Be Confused: He can't fathom the fact that Yifa likes being Seika's slave and thinks she's being conditioned or brainwashed into not wanting her own freedom. He even goes as far as to trying to force her to sign the contract that liberates her.
Lize
Voiced by: Rina Sato (Japanese), Katie Wetch (English)
An elf woman who follows Cecilio everywhere.
- Everyone Has Standards: She mostly enables Cecilio's poor behavior and helps him get what he wants, like almost forcing Yifa to sign the contract to her freedom. She draws the line when Cecilio orders to have the guardian dragon killed despite knowing it isn't dangerous, and tries to have Seika arrested to have Yifa to himself.
- Pointy Ears: Due to being an elf, her ears are long and pointy.
- Shipper with an Agenda: She tries to talk Yifa into joining Cecilio's harem because she thinks it's too dangerous for her to stay near Seika. Once she finally understands that Yifa loves Seika, she supports her decision to stay by his side.
