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The Royal Tutor
Heine Wittgenstein
- Voiced by: Keisuke Ueda (Japanese), Micah Solusod (English)
The titular Royal Tutor. A serious and dedicated teacher who is absurdly talented. Although he is old enough to be the princes' father, he is often mistaken as a child.
- The Ace: He's ridiculously good in just about anything he does. When Bruno challenges him to a series of tests to test his worthiness as a tutor, Heine dominates them all.
- Adaptational Backstory Change: The anime aired when Heine's past was still unknown in the manga, so the adaptation took its liberties and this caused his anime backstory to differ considerably from the one in the manga.
- In the anime, as a teenager, Heine was the leader of a group of homeless children. Viktor met him on one of his excursions sneaking out of the palace, and they became friends as Heine's situation opened Viktor's eyes to the reality of the kingdom. One fateful night however, Viktor was caught going with Heine while the palace was in an uproar due to his disappearance. The guards believed Heine was kidnapper they were searching for, and as Heine and Viktor were running away, one of them leveled his gun barrel at Heine to shoot him, only for Viktor to shield him instead. Heine went berserk on the guards but eventually came to his senses when Viktor’s pleas reached him, and remained distraught over Viktor’s condition as the recovered guards dragged him away. Despite being in prison for crimes he didn’t commit, Heine never pleaded his innocence, only prayed that Viktor would recover. His wish was granted, and Heine was pardoned when the truth came clear. After Viktor's accession, Heine became a tutor at a church Viktor built for street children to stay in, and then the Royal Tutor.
- In the manga, Heine is revealed to be a former mafia boss whose criminal group tried to fight off the injustice that plagued their people in the kingdom. Eventually, some of his subordinates tried to assassinate King Viktor on a rainy night that the king escaped from the palace. Heine stopped them, but Viktor was still stabbed on the back and Heine was mistaken for the attacker, getting him arrested. Viktor saved him from execution by asking him to become his royal tutor so he could learn about the history of the Kvel people from him and put a stop to their discrimination. After that, Heine started teaching children at a small church deep in the forest until Viktor called him back to teach his sons.
- Badass Adorable: He's a very cute, childish looking tutor, but he's so strong that he can beat up several grown men on his own without breaking a sweat.
- Badass Teacher: Heine may appear like a child but as seen when Fuchs and his mooks physically threaten Kai, he alone is more than enough to take care of them. And even before then, he easily catches up to the fleeing Leonhard on horseback and casually proves his intelligence and smarts to the already brilliant Bruno.
- Berserk Button: Being mistaken for a child, and he has Height Angst.
- Brutal Honesty: Heine does not hold back on his opinion on things or if the person needs a stern wake-up call. One instance is telling Leonhard that one of the many reasons why he did so poorly on Heine's competency test is because he chased away several tutors.
- The Comically Serious: Most of the humor comes from his deadpan reactions to the royals' craziness, and there's also his habit of Saying Sound Effects Out Loud with a completely straight face.
- Curtains Match the Windows: Orange-red hair color and reddish-amber eyes.
- Dark and Troubled Past: Although his origins differ in the manga and anime, he didn't have an easy life before he became a teacher.
- The Don: He was the leader of a Kvel mafia before he saved Viktor's life and becomes his royal tutor.
- The Gadfly: There are moments where he's just messing around with the princes—Licht in particular is rather easy for him to tease. At the very least, when Licht is paranoid that Heine caught a glimpse of his plans to leave the palace, Heine repeatedly pulling a Bait-and-Switch to make it seem as though he did before making it seem that he didn't—when he did—was really just him screwing with Licht's head.
- Gentleman Snarker: When a majority of the rest of the main cast is a Cloudcuckoolander in some way, it's unavoidable that he throws snarks at them. But even when he insults them, he always remains polite.
- Heterosexual Life-Partners: With Viktor. The specifics aren't clear but they have been friends for years, Viktor is the first person Heine could trust and Viktor entrusts his sons to Heine despite knowing the latter's Dark and Troubled Past.
- In the anime, it's revealed that as a teenager, Heine was the leader of a group of homeless children. Viktor met him on one of his excursions sneaking out of the palace. Heine's situation opened Viktor's eyes to the reality of the kingdom, and they became friends, initially without Heine knowing that Viktor was a prince.
- Long-Haired Pretty Boy: He has shoulder-length hair in his younger days.
- Manly Tears: In the anime’s last episode, he shed tears when witnessing the princes defending him and insisting on having him as their tutor in front of the court.
- Mistaken Age: Becomes a running gag as people who first meet him often thinks he's a child due to his extremely short height, much to his annoyance.
- Mistaken for Pedophile: Played for laughs when the three-year-old Adele tells Beatrix that Heine asked her to marry him. Heine has to explain he was just playing make believe.
- Mister Big: Although it's hard to believe with his cute childlike appearance, he was the crimal boss of a mafia until he met Viktor.
- Mysterious Past: Aside from the fact that he used to teach at a church and is a close acquaintance of the King, there’s almost no information about his personal life before he enters the palace. The hints are many, but they are disorganized and may or may not be real. Not so mysterious in the anime, however.
- Not So Above It All: Gets a little forgetful when "surrounded" by Licht's "company".
- Older Than He Looks: Despite his short height and childlike appearance, he's an adult man.
- Penny Among Diamonds: Heine is a commoner who has been hired as the royal tutor for four princes. He's frequently blaffed at the luxuries of his students' lifestyles.
- Private Tutor: He's currently working as the four princes' live-in royal tutor. Before, he used to teach at a church and before that, he was a mafia boss.
- Reformed Criminal: The career he had before becoming a teacher wasn't a very virtuous one. He was the leader of a Kvel mafia that acted as vigilantes for their people who lived in unfair conditions. His life turned around when he stopped some of his men who tried to assassinate Viktor and Viktor asked him to teach him about the hardships of the people of the kingdom to become a better king.
- Saying Sound Effects Out Loud: A Running Gag with him, such as snatching Leonhardt's diary and going "Step step step step step! Roll roll roll roll roll!" as he scuttles away from him then rolls under the couch.
- Single Tear: He sheds a tear after hearing the princes' speeches to the kingdom in the penultimate chapter, overjoyed at seeing that his efforts to make a better country have paid off and he can trust his students will create a bright future.
- Smart People Play Chess: During his interview, Bruno challenges Heine to chess, in order to test his teacher's level of intelligence. Heine wins the game in a few seconds.
- Stern Teacher: Won't mince any words with his students and will resort to Tough Love if he has to, but he's genuinely invested in their growth and they adore him for it.
- Straight Man: To the antics of the royal family.
- The Stoic: Heine rarely shows changes in his facial expression but when he does, it's subtle.
- Sugar-and-Ice Personality: He's stoic, strict, and sarcastic. He's also a very kindhearted, morally strong, and considerate person who gives his all to guide his students who he cares for from the bottom of his heart.
- Tears of Joy: Heine and Viktor finally tell the princes the full story of Heine's criminal past and how he met the king when saving him from his own mafia subordinates. The princes are only relieved that Heine stabbing Viktor was a false charge and make clear they're still happy to have Heine for their tutor with no importance of who he was before. Heine turns his back and faces the wall. The princes see no tears when they check his face... But the reader does see the tear drops in the floor after everyone leaves the room.
- Terrible Artist: Art is the one thing he doesn't excel at.
- Trash of the Titans: Heine is naturally messy and his room is filled with piles of books and other such things, which sent the princes in shock as they discovered.
- Vocal Dissonance: The anime gives him an adult voice that matches his actual age, but comes at odds with his childlike body.
- Wouldn't Hurt a Child: His personal philosophy is not never lay a finger on those younger than him. He restrains Fuchs with minimal force and even saves him from collateral damage, simply because he is a child with a bad lot in life.
Main Princes
Tropes that apply to all four
- Breaking the Fellowship: As of Ch. 53, they've all gone their own ways: Licht leaves the palace to live outside and pursue working at the cafe full-time, Bruno goes on an international exchange to Orosz, and Kai departs for a month for military training. Meanwhile, Leonhard stays behind at the palace.
- Endearingly Dorky: They're all rather quirky and occasionally lacking in common sense, but in a well-meaning sort of way that comes off as rather endearing.
- Four-Temperament Ensemble: Kai is Phlegmatic (reserved, gentle, and compassionate), Bruno is Melancholic (serious, analytical, and hard-working), Leonhard is Choleric (stubborn, short-tempered, and blunt), and Licht is Sanguine (carefree, cheerful, and sociable).
- Friendless Background: Played for Laughs. When Kai returns to military school and manages to make a friend, the other princes are thrilled for him... only to realize at the end of the chapter that, in spite of worrying about Kai, none of them have any friends either.
- Friendly Rivalry: Despite being rivals for the throne, they're all extremely supportive of one another. When Leonhard starts missing the "friendly" part of things, the others have to make it a point to tell him that rivals doesn't mean enemies.
- Hidden Depths: Their debuts and interviews are essentially about displaying an archetype and subverting it, with their subsequent spotlight chapters/episodes elaborating further.
- Kai initially seems cold and hostile, with a reputation for violence, but he's revealed to be a gentle pacifist and the only prince who fully accepted Heine from the beginning. Eventually, he's shown to have remarkable emotional fortitude, with the willingness to face those who might hurt him being the backbone of his development.
- Bruno seems like a haughty know-it-all, but turns out to be a humble student who's elated to have a tutor who can actually teach him for once. Furthermore, in spite of seeming to be the most competent prince, he's actually one of the most insecure.
- Leonhard, like Bruno, appears rather arrogant at first, and while in some ways he really is that cocky, he's also much more kindhearted and childish than he seems. And, Book Dumb he may be, he has a natural sense of inventiveness that even Bruno envies.
- Licht comes off as flighty and irresponsible, but he's also surprisingly perceptive and observant, such as correctly guessing that Heine isn't exactly a normal tutor, and being able to see through his sleight-of-hand trick after seeing it only once. In addition, he loves his job as a waiter and takes it very seriously, and genuinely appreciates everything he's learned while working there. He's also stated to look up to his father and his boss at the cafe for both of them being hardworking men who take their jobs seriously, and wants to be like them.
- King Incognito: For safety reasons, they hide their identities as royalty whenever they're wandering around town.
- Modest Royalty: Typically, they just wear their fairly plain uniforms.
- Pretty Boy: They're all remarkably good-looking, with Heine commenting on how it's as if they stepped out of a painting.
- Royals Who Actually Do Something: None of them quite have enough influence to be this just yet, but they're all aiming to be this trope.
- Sharp-Dressed Man: Their civilian outfits.
- Sheltered Aristocrat: Simply put, Licht is the only one to have walked around town, and even he's rather clueless about how commoners actually live.
- Terrible Artist: When Heine asked them to make a portrait of Adele for their art class, Licht's picture was the only one that managed to depict a human.
- "Well Done, Son" Guy: They all want to make their father proud.
Kai von Granzreich
- Voiced by: Yuuya Asato (Japanese), Daman Mills (English)
The second prince. He appeared menacing, but is actually extremely gentle and shy with no social skill at all.
- Adaptation Dye-Job: The anime takes his light brown hair and makes it a very pale blond instead. With that said, his hair does appear blond in later illustrations, making the brown hair a potential case of Early Installment Character-Design Difference.
- All-Loving Hero: The only prince who's happy to see their father—exaggerated to the extent where Heine notes that it's less Kai is strong-hearted as it is that he, er, sees things on a galactic scale. Also, he's the only prince who claims to like Eins.
- All of the Other Reindeer: Though his family loves him dearly, he's ostracized by others as they all fear him, in a combination of him having the Face of a Thug and his ill reputation.
- Animal Lover: He loves animals, especially the soft and fluffy ones.
- Arranged Marriage: He's engaged to Beatrix because it has been decided by their families.
- Better with Non-Human Company: He is shy and unsure around anyone who isn't his family, but animals seem to be naturally drawn to him.
- Beware the Nice Ones: He's normally the All-Loving Hero among the princes. With that said, hurting those he cares about is a Berserk Button for him, and if you value your well-being, you'd do well to avoid pressing it.
- Big Brother Instinct: Fuchs found out the hard way why hurting Bruno in front of him is not a good idea.
- Big Brother Worship: Unlike his younger brothers, Kai is very fond of Eins even though Eins grew so distant of the family because he remembers Eins was a kinder brother when he was a child and he was one of the few people who could understand what Kai wanted to say without Kai even trying to say it.
- Charles Atlas Superpower: He can single-handedly carry a statue larger than he is tall, much to the shock (horror?) of everyone around him.
- Cloudcuckoolander: He's often off in his own world.
- Coat Cape: He wears his jacket over his shoulder like a cape.
- Cuteness Proximity: He loves cute and soft things/people.
- Death Glare: What the servants think he's giving them.
- Face of a Thug: He's a very nice guy, but because he looks like he's always scowling, everyone except for his family is initially too scared to approach him.
- Friend to All Living Things: Animals tend to surround him when he goes outside.
- Gentle Giant: He's the biggest and physically strongest of the princes. Despite his naturally scary eyes, he's a sweetheart.
- Get A Hold Of Yourself Man: He breaks his oath of nonviolence to give Eins a punch in the face for trying to kill himself and give up his position of heir to the throne just because he's ashamed of himself for spending almost every day crying over his ex-fiancée.
- Hiding Behind Your Bangs: His hair hides his left eye to show his socially awkward and quiet nature.
- In Touch with His Feminine Side: He adores cute things, especially fluffy animals, and is an expert at making flower crowns.
- Kissing Cousins: He's engaged to Beatrix, who's a cousin on his mother's side.
- Lazy Bum: It's less apparent in later chapters, but early on, he apparently finds it tiring to even breathe.
- Licked by the Dog: Exaggerated. After Kai's return to military school, the other students see cats being drawn to Kai, revealing his soft side... only for him to be completely buried in them, at which point all emotions turn to concern for his well-being.
- Master of the Mixed Message: He unintentionally confuses the hell out of his arranged fiancée Beatrix because he keeps sending her mixed signals that make her ponder whether Kai likes her romantically or not. For example, Kai calls her a part of his family, but Beatrix is unsure if he meant he sees her as his future wife or simply his cousin.
- Misunderstood Loner with a Heart of Gold: He's reputed as violent and temperamental, but is in fact an All-Loving Hero and Gentle Giant. Licht lampshades him being this trope at one point, calling it the "all-too-common pattern where someone you thought was scary turns out to be a gentle soul".
- Oblivious to Love: Kai seems unaware of Beatrix's romantic feelings for him. He even thinks she makes a Shadow doll for him because she likes soft things instead of him.
- The Quiet One: He's not great with words and so prefers to keep quiet, although it doesn't help his ill reputation any.
- The Silent Bob: When he was five years old, he could communicate with his older brother Eins without saying a word. It seems Eins is so smart that he could perfectly guess what Kai wanted to say from the situation and movement of his eyes alone.
- Smarter Than You Look: Licht is rather surprised to hear that Kai did well on the competency test. Bruno, on the other hand, points out that Kai always gets good marks.
- Terse Talker: He speaks briefly and rarely says more than a few words in a sentence.
- Turn the Other Cheek: To an extent. Though he admits that he can't forgive Fuchs, he's still willing to give him another chance as that's the kind of kingdom he wants: one where anyone can start over.
- The Unintelligible: He's rather soft-spoken and mumbles sometimes. For instance, his first impression on Heine appears to be him saying "Get lost". However, he was actually saying "I hope we get along".
- The Un-Smile: His attempts at smiling always make people freak out because he ends up looking like he wants to kill someone.
Bruno von Granzreich
- Voiced by: Yuto Adachi (Japanese), Christopher Wehkamp (English)
The third prince. Exceptionally brilliant and the most serious of the four princes. After Heine proves him how worthy he is as their tutor, Bruno becomes his fanboy.
- Adaptation Dye-Job: Like Kai, he has brown hair but is blond in the anime—though like Kai, his hair becomes increasingly lighter in illustrations as time goes on, making it unclear exactly what shade he's supposed to have/if the anime is actually a change.
- Anger Born of Worry: When Kai gets sick from eating berries in the garden, Bruno blows up at him for worrying him at his brother collapsing.
- Animals Hate Him: Much to his dismay, when he's the only one at the petting zoo with no luck feeding the animals.
- Aw, Look! They Really Do Love Each Other: Despite Licht having told him earlier that he wished Bruno wasn't his brother, Bruno makes it very clear that no matter how much he and Licht may fight, Licht will always be his dear brother.
- Big Brother Instinct: Not so obvious as Kai, but he cares a lot for the younger siblings. In the manga he once almost went to town in the middle of the night to look for Licht, after the latter didn't come back for dinner after an argument.
- Big Brother Mentor: Bruno tries to help Leonhard study, but his brother's exaggerated Big Brother Worship causes him to lose focus whenever Bruno says something smart instead of trying to understand what he says.
- Book Smart: He's the most academically accomplished of the four princes and aces the test Heine gives him in their first meeting.
- Brainy Brunette: Brown hair unlike his siblings (blond in the anime, but as a notably darker shade and so still giving the impression of this trope), and the resident Teen Genius.
- Broken Ace: The most distinguished of the four, with perfect grades, respect he's earned for the papers he publishes, and someone whom his brothers depend on—Leonhard in particular views him as perfect. Inside, though, Bruno's terrified that Hard Work Hardly Works and hates that he's secretly a Green-Eyed Monster even towards his siblings.
- Bully Magnet: He was hated and bullied in military academy due to other students resenting him for being a prince.
- Defeat Means Respect: Humorously exaggerated. After Heine beats him in every test he could come up with, while showing him along the way that he still has much to learn, Bruno begins to call him "master", and practically hero-worships him.
- Foolish Sibling, Responsible Sibling: Bruno is a stickler for manners, tidiness, and duty, whereas Licht is just about the opposite of all those things (though, unbeknownst to Bruno, he's not actually as lazy as he seems).
- Heroic Self-Deprecation: Though he tends not to be open about it, his self-confidence is actually rather shaky. Ch. 23/Episode 7 has him often initially assume he failed when he in fact succeeded, and he doesn't seem to be completely aware of just how much he's done for Leonhard until Leonhard lays it out for him.
- Humble Hero: Despite his many accomplishments, he is very aware that he isn't a genius like Eins and that, had he been born a commoner, he would have been an ordinary man.
- Lonely Rich Kid: Not quite lonely, but being royalty did him no favors in military academy and it's eventually revealed that he hasn't entirely gotten over it and is understandably wary of trying to befriend any peers his age.
- The Magnificent: According to his epilogue, Bruno was lauded posthumously as "Bruno the Wise" because of his achievements as a professor.
- Neat Freak: Obsesses over how books should be placed on a shelf, and refuses to have a game of chess until the chess set is spotless.
- No Social Skills: He has no issues with public speaking or anything in a professional capacity, but he can be rather awkward in a more casual context.
- The Resenter: His self-admitted Fatal Flaw is that he gets easily jealous and bitter towards more talented people. However, he does his best to keep it at check.
- The Smart Guy: His superior intellect is admired by his brothers, and in particular, by Leonhard, who plays the opposite trope The Fool.
- Smart People Wear Glasses: The most studious of his brothers, and wears glasses.
- Stoic Spectacles: He wears glasses and tends to be one of the more down-to-earth princes (most of the time, anyway).
- Team Dad: And Team Mom, depending on the context. He frequently takes it upon himself to fuss over his siblings—Kai included—whether that means lecturing them (see: half his interactions with Licht) or looking after them.
- Teen Genius: He's already giving speeches at universities at sixteen.
- Vitriolic Best Buds: With Licht, because of their very different personalities and outlooks in life. They are the only brothers who have had serious fights with each other.
Leonhard von Granzreich
- Voiced by: Daisuke Hirose (Japanese), Alejandro Saab (English)
The fourth prince. A beautiful young man with ego as high as the mountain. While he is very athletic, his academic level is lower than that of an elementary student.
- Bait-and-Switch Character Intro: In the first chapter, Leonhard is the first prince to greet Heine, acting very polite and charming while doing so. It takes him only one second to reveal his rude and hostile attitude to Heine, making clear he hates teachers and only wants Heine gone.
- Beautiful Tears: He bursts into tears because his back itches when he's in the middle of posing for a portrait. The painter gets inspired to make a painting of Leonhard's beautiful crying face and the prince's popularity skyrockets thanks to it.
- Big Brother Instinct: He is very protective and caring towards Adele.
- Big Brother Worship: He idolizes his older brother Bruno.
- Book Dumb: He got a score of only one point out of 100 in the first test Heine gave him. And that one point was for at least writing his own name right. He didn't even know what's 1+1, thinking it was three or eleven. Later on, though, Leonhard shows he has great capacity of coming up with very good ideas by looking things from another perspective and shows skill in learning languages once he starts speaking the language of Fonsein to communicate with Prince Claude.
- Brainless Beauty: Being acclaimed as the owner of the most beautiful face on the entire kingdom, Leonhard, or the 'White Lily of Grannzreich', is amazed when receives the unprecedented score of 15 out of 100 on a test.
- Bratty Half-Pint: Due to his childishness, he can act like an insolent brat towards Heine (and occasionally others outside of his family) despite being in his teens already.
- Characterization Marches On: Leonhard initially comes off as someone who gave off a haughty, vain vibe in addition to his beauty, causing readers to think that he's going to be the stuck-up prince who looks down on commoners, but as the series goes on, he became more of Butt-Monkey, with his Book Dumb tendencies, penchant for clinging to people, and general childishness being emphasized. Lampshaded by Heine, who mentions that he completely forgot about it when he was reminded that Leonhard is actually known as the "White Lily of Granzreich" because of his beauty. Even the mangaka herself wondered how this happened in the extras that came with Volume 1. The anime resolves this by making the prior more of a quickly squashed jerkassery front.
- Chaste Hero: He has zero knowledge about sex and porn. He's actually shocked when he learns he's expected to get married if he becomes king and declares he's going to create a law to help him avoid that.
- Childish Older Sibling: With his attitude, you'd be forgiven for thinking he was the youngest prince, not Licht.
- Cuteness Proximity: He has a cuteness overload towards a marmot in the zoo episode.
- Defrosting Ice King: Out of all the princes, he takes the longest to warm up to Heine.
- Delayed Reaction: After Licht finally moves back to the palace after months of living in town, it takes Leonhard several seconds to have the surprised reaction his reunion with his brother deserves.
- Does Not Like Spam: He doesn't like bitter drinks. He even wanted to ban coffee in the kingdom.
- Dumb Blond: The only prince with pure blond hair is also the Book Dumb one.
- Dumb Jock: Where Leonhard fails at academic studies, he excels in physical activities like running, horseback riding and fencing.
- Easily Impressed: As made apparent on the trip to the city and the visit to the zoo, Leonhard is very easy to impress by the commoner's lifestyle. Also, Bruno's attempt to teach him basic math ended up backfiring because Leonhard gets too distracted gushing about every single smart thing he says.
- Freudian Excuse: When he was a child, his first royal tutor used to beat him. This is why he hated teachers before he bonded with Heine.
- Green-Eyed Monster: He's briefly jealous when he learns that Heine has had pupils before the princes. To a lesser but more consistent extent, he tends to fume a tad whenever Bruno's giving someone else attention or praise.
- Hair of Gold, Heart of Gold: He inherited his father's blond hair. He's known as the most beautiful of the princes and has a very kind heart.
- Inferiority Superiority Complex: In his first meeting with Heine, Leonhard acts like the haughtiest and most condescending of the princes to his new tutor. Soon, however, Heine finds Leonhard's diary where he records all his mistakes, discovering the prince has very low self-esteem and thinks of himself as a disaster behind that arrogant front.
- Informed Attractiveness: He's considered the most beautiful of the princes In-Universe, even though they're all designed to be attractive.
- Kiddie Kid: He's fifteen, but his emotional maturity is that of an elementary school kid.
- Kindhearted Simpleton: He's supremely simpleminded and sucks at studying, yet is a good and kindhearted guy once you look past his bratty tendencies.
- Literal-Minded: Every time he's called the White Lily to his face, all he does is insist that he's not a plant, apparently unaware that he's being complimented.
- Lovable Jock: He has tons of trophies because of his athletic accomplishments and is a very sweet guy when he stops acting like a brat.
- Madness Mantra: When preparing his speech for Founding Day, Leonhard is the only prince who doesn't seem too stressed out... Until Heine checks the draft of his speech and all it says is "torte torte torte" for several pages.
- My Sister Is Off-Limits: He's the only prince who opposes strongly to letting his little sister Adele be set up in an Arranged Marriage and sent to another kingdom. He eventually meets Adele's intended fiancé Prince Claude, but the boy is such a sweet kid that Leonhard can't say anything negative about him and eventually admits having him for a younger brother wouldn't be bad at all. While he's still not fond of the idea of his sister getting married, he's going to save his protests for when Adele and Claude are older and decide if they do want to get married.
- No Social Skills: Struggles with even basic manners (and knows it), and when volunteering to help Kai with the latter's own lack of people skills, Leonhard admits that he's not good at socializing with others either.
- Picky Eater: He hates carrots and bell pepper. He developed the habit of placing his vegetables in Kai's plates without Kai realizing it.
- Prone to Tears: Leonhard is quick to put on the waterworks when he is upset, flustered or happy.
- Rich in Dollars, Poor in Sense: He doesn't even understand the basics about the use of money. Heine points out that if Leonhard weren't born a royal, he wouldn't have been able to survive.
- Royal Brat: He initially gives the impression of being a bratty prince because of his very rude and arrogant attitude towards Heine who even labeled him the "Everest-Pride Prince". It gets quickly subverted; Leonhard was only acting that way because of his personal disdain for teachers and as soon as Heine gains his trust, he quits the bratty attitude.
- Simple-Minded Wisdom: He's incredibly Book Dumb, but his simplistic and open-minded outlook allows him to come up with innovating ideas and options others aren't capable of even considering due to being too preoccupied with laws and customs.
- Sweet Tooth: He adores sweets and desserts.
- Trademark Favorite Food: He loves torte.
- Tsundere: A non-romantic example of a Harsh (Tsun) type. Leonhard starts off as an arrogant brat and initially rejects Heine the most strongly out of the princes because he views all educators as his enemies. Once he realizes Heine is a good and encouraging teacher, he comes to respect and accept him, but Heine's teasing can still make him annoyed.
- Upper-Class Equestrian: He got good at horseback riding while he tried to escape from his previous royal tutors.
- Wide-Eyed Idealist: When the princes are talking about the sort of kingdom they want to create, Leonhard says, without a hint of irony, that he wants to beat up all the bad guys and make a kingdom full of good people. The other princes can't avoid being amused at his simplicity.
Licht von Granzreich
- Voiced by: Shouta Aoi (Japanese), Stephen Sanders (English)
The fifth and youngest prince. A playful, charismatic womanizer, but is also surprisingly hardworking. He has a second identity known as Richard, a waiter at Cafe Mitter Meyer.
- Annoying Younger Sibling: Occasionally, he annoys Bruno and Leonhard. Especially Bruno sees him as immature and irresponsible because of his flaky behavior, although both Bruno and Leonhard start respecting him more after they learn of his part-time job.
- Aw, Look! They Really Do Love Each Other: See Bruno's section. On Licht's part, he breaks into tears and offers Bruno an apology gift, deeply regretting what he said.
- Big Little Brother: He's taller than his older brother Leonhard. Licht's boss points out Leonhard looks like the younger brother.
- The Charmer: Known for having a bright, charismatic personality and being popular with women.
- Chivalrous Pervert: He's very fond of the ladies, to the extent of secretly owning porn magazines, but he's also the sort who wouldn't hesitate to protect one from harm.
- Even the Guys Want Him: His charms attract males too. A male ostrich, but still.
- Foolish Sibling, Responsible Sibling: With Bruno, whom Licht is the complete opposite of (minus the part where Licht's a lot more hardworking than he'd care to admit to others, at least). He's light-hearted and playful, next to Bruno's serious and studious attitude.
- I Choose to Stay: He decides to leave the palace and has no interest to become king, but instead live independently and as a normal person working as a waiter.
- I Just Want to Be Special: Of sorts. He's very attached to his image as the "cool playboy" and, despite actually being rather serious and hardworking at his job, seems to think that being viewed as so would be a nightmare. Heine's fond of teasing him by calling him "ordinary".
- Living a Double Life: To his family and friends, he's the flighty and fun-loving prince, but to the customers and employees of Cafe Mitter Meyer, he's Richard, a hardworking waiter.
- Long-Haired Pretty Boy: He has rather long hair compared to the rest of his family and is just as pretty as his older brothers.
- Non-Idle Rich: Even though he's a prince, he works part-time at a cafe just because he likes it. Eventually subverted when he starts working full-time—after leaving the palace, meaning that he's now completely independent and actually poorer than Maximilian, his guard.
- No Sense of Personal Space: Licht is very fond of hugging and getting close to others.
- Only Sane Man: He's not without his quirks, but he's at least usually intentionally weird, whereas his siblings are blissfully so, and in fact has rather ordinary sensibilities (as Heine loves to poke fun at). When the princes are to draw a portrait of Adele, his is the only normal one, compared to Kai's abstract painting, Leonhard's childishly cute one, and Bruno's In-Universe Accidental Nightmare Fuel.
- Parting-Words Regret: Downplayed, but though he denies caring when Heine brings it up, it's evident he wishes he got to make up with Bruno before Bruno left for his international exchange in Orosz.
- Primal Fear: He's scared of animals and does not come near or touch them, not even their family pet Shadow, since they are very affectionate toward him.
- Purely Aesthetic Glasses: He wears some glasses he stole from Bruno when secretly working on a cafe under the alias of Rich.
- Sickly Child Grew Up Strong: He was very sickly and weak as a child. As a teenager, he's very healthy and lively.
- The Slacker: His contribution in driving off all of the previous tutors? They found it impossible to motivate him to study, as he'd rather goof off instead.
- The Social Expert: "Expert" might be an exaggeration, but he prides himself on being able to read people and his customer service skills, and he's notably the only one among the four princes who doesn't suffer from No Social Skills.
- When You Coming Home, Dad?: He resents their father for never being around whenever he was sick as a child, though he eventually comes to understand that Viktor was genuinely too busy to, rather than uncaring.
- Younger Than They Look: He's fourteen, but definitely doesn't look like it, and the way he acts doesn't help, either.
Other members of the Granzreich Family
Viktor von Granzreich
- Voiced by: Toshiyuki Morikawa (Japanese); David Wald (English)
The King of Grannzreich and father to the princes and princess. Though he seems strict and no-nonsense, he’s that type of overly affectionate father.
- Amazingly Embarrassing Parents: Whenever he sees his children, Viktor goes into over-affectionate Doting Parent mode. There's a reason why none of them (sans Kai) are elated to see him, let alone in front of Heine.
- Bait-and-Switch Character Intro: When we're first introduced to the king, his four sons look very nervous about meeting him, implying he's probably a very strict father. They step into his room and he quietly stares at his sons... And starts shedding tears at the joy of seeing his dear children. Turns out his sons were so nervous because they found it embarrassing to have their father acting like a Doting Parent in front of Heine.
- Doting Parent: He cries from joy just by seeing his children, and can't even bring himself to spar with Leonhard.
- Interclass Friendship: Heine is a commoner and former criminal boss, but King Viktor considers him his best and dearest friend. Heine doesn't agree that they're friends, but does return the sentiment deep down.
- Family Eye Resemblance: All of his children inherited his blue eyes.
- The Good King: He's responsible for leading his country into prosperity. The fact that he's such a good king is part of why his sons are determined to follow in his footsteps.
- Good Parents: Although his job as king keeps him busy, he still manages to be a respectable and loving father who would give anything in the world for his beloved children.
- Hair of Gold, Heart of Gold: He's a benevolent, noble, and kindhearted king with blond hair.
- Master Swordsman: Reputed as the strongest swordsman in the country.
- Mum Looks Like a Sister: A male example. Viktor appears as young as his sons. At one point, he admits that he and his first son look like brothers, with Eins seeming the older of the two.
- Prone to Tears: He's prone to crying a river around his sons.
- Puppy-Dog Eyes: In episode 6, he flashes these at the owner of Licht's cafe, effectively causing the latter to hire him for a few hours.
- Taking the Bullet: In the anime flashbacks exclusively, he shielded Heine when a guard fired a gun at him, mistakenly believing that Heine kidnapped Viktor. He did come out fine, but it costed Heine a time in prison and gave him the 'criminal' reputation.
Eins von Granzreich
- Voiced by: Daisuke Ono (Japanese); J. Michael Tatum (English)
The eldest prince, and the one most people believe will be the next king. A stern man who acts business-like at all times, even with his own family.
- Abdicate the Throne: At the end of the manga, Viktor chooses Eins as the next king. However, Eins doesn't believe he's qualified to be king after he tried to take his own life over a woman. Eins rules as king for only seven years and then cedes the throne to his younger brother Leonhard.
- Aloof Big Brother: He appears to be his younger brothers' superior as a future king in every aspect and doesn't seem to have any interest in having a good relationship with them. His younger brothers don't even know him that well because Eins frequently spends several months away from home and when he's around, he chooses to hang out with his friend Ernst over his family. After they stop his suicide attempt and accept him despite his flaws, Eins embraces his brothers as his family and rivals.
- Berserk Button: People thinking he looks older than his father is a touchy subject for him.
- Cannot Talk to Women: Ever since he broke off his engagement with Matilda, Eins can't talk to young women without crying and running away because of how much he misses Matilda.
- Childhood Friends: With Ernst Rosenberg, his high steward. In fact, he spent more time with Ernst than his own brothers.
- Eerie Pale-Skinned Brunette: He has black hair and pale skin. Compared to his siblings with lighter hair colors, Eins is very suspicious and intimidating with his stern personality, although he eventually turns out to not be really bad.
- The First Cut Is the Deepest: He broke up with Matilda, even though he truly loved her, for the sake of her artistic dream and happiness. His broken heart prevents him from starting a new relationship and this has ended up ruining every next attempt of arranging a marriage for him. According to the epilogue, Eins never gets married, implying that he never fully gets over Matilda.
- Heterosexual Life-Partners: He and Ernst have been inseparable since they were children.
- I Want My Beloved to Be Happy: He fell deeply in love with his first fiancée Princess Matilda, but he broke off their engagement so she could pursue her dream of becoming an artist, even though it broke his heart.
- Innocently Insensitive: Eins doesn't mean to be rude, but he's bad at expressing himself and many of his gestures are easily misunderstood when he doesn't have bad intentions at all. For example, when he returns home for the first time in months, he greets his brothers by throwing their welcome bouquet to him away. The brothers think Eins is belittling them, but the truth is throwing away the bouquet was an accident and Eins was merely saying there's no need of formalities among family. He doesn't even think about how his brothers viewed his actions until they point it out much later.
- Interrupted Suicide: He's terribly depressed both because of breaking up with Matilda and feeling inadecuate as a successor to the throne because he can't get over her. Eventually, Eins runs away to the royal family's villa with a gun. He would have probably shoot himself if Heine, his brother, and Ernst haven't arrived at the villa to stop him.
- Jerk with a Heart of Gold: He gives off a very unpleasant impression for acting distant, dismissive, and rude towards his own family. Later on, he's revealed to have a softer side, mainly through his friendship with Ernst. He eventually acknowledges his younger brothers as rivals worthy of his respect after they stop him from committing suicide. He also apologizes to Leonhard for calling him a dunce and not taking him seriously as a rival once he realizes the value of Leonhard's sincerity and ability to think outside the box, although he refuses to repeat himself when he realizes Leonhard wasn't listening to his apology.
- The Perfectionist: He has very high standards for himself as the eldest prince expected to succeed the throne. The simple fact that he can't have a successful engagement because he hasn't gotten over Matilda is something that he views as inexcusable for a king who must produce heirs. This put him into a very bad state of depression until Heine makes him understand it's alright to not be perfect.
- Perfectly Arranged Marriage: Subverted. At first, he saw his engagement to Princess Matilda as a political marriage. As he knew her better, he genuinely fell in love with her free-spirited personality and passion for art. However, it was that same love what drove Eins to break up with Matilda so she could pursue her dream of becoming a painter.
- Perpetual Frowner: His default expression is a stern frown.
- Pet the Dog: The first hint that he isn't that bad is how he's shown to be respectful towards his grandmother, accept her tea party offer and refuse to smoke in her presence.
- Prone to Tears: His most embarrassing secret is that he cries a river whenever he's emotionally distressed. He gets it from his father's side. He sees this as a big problem because ever since he broke up with Matilda, he can't stop himself from crying whenever he's in the company of young women.
- Shared Family Quirks: Turns out he's the only prince who cries easily, a trait inherited from his father and grandmother. In his case, he cries every time he thinks about his ex-fiancée.
- Single-Target Sexuality: He knows he should find a new fiancée since he needs to produce an heir, but he just can't bring himself to love any woman but Matilda. The epilogue pretty much confirms Matilda is the only love of his life given that he never gets married.
- Sugar-and-Ice Personality: He seems very cold, aloof, and unapproachable at first glance. Later appearances reveal he's far from heartless and does care for others in his own way.
- Talented, but Trained: Everyone calls Eins a genius and he's indeed very smart and talented, but Ernst truly admires him because he knows better than anyone that Eins does put a lot of effort into cultivating the skills he needs to be a good king.
- Tall, Dark, and Handsome: He is as attractive as his father and brothers, but unlike his blond and blue eyed family he has dark hair.
- When He Smiles: Ernst blushed a bit when he saw Eins' smile for the first time when they were kids.
- Younger Than They Look: Mild example. He's 23 years old, but looks much more mature because of his stern expression. He dislikes being told that he looks older than his own father.
Adele von Granzreich
- Voiced by: Michi Matsui (Japanese); Jad Saxton (English)
The youngest child and only princess.
- Arranged Marriage: Her father expects her to marry Prince Claude of Fonsein, but it's still not set in stone until they're older and both consent to the arrangement.
- The Baby of the Bunch: She's the youngest Granzreich child and is babied by her older brothers.
- Cheerful Child: She's only three years old and always seen smiling.
- The Cutie: She's the cutest and most lovable little sister the princes could have asked for.
- Flowers of Femininity: Her hair is almost always decorated with a flower ornament, making the little princess look even girlier and more adorable.
- Hair of Gold, Heart of Gold: She's an incredibly cute and innocent little princess with long blonde hair.
- Innocent Blue Eyes: Big sky blue eyes for an innocent little princess.
- Practically Different Generations: She's eleven years younger than Licht, the youngest of her five older brothers, and her eldest brother is twenty years older than her.
- Precocious Crush: She is very attached to Heine, who is old enough to be her father. Though it's unclear if this emotion is just temporary, or a mere daughter-father like bond.
- Princess Classic: She's a really cute, innocent and pure-hearted little princess.
- Princesses Prefer Pink: She's the only princess in the Granzreich royal family and is almost always seen in a pink dress.
- Third-Person Person: She refers to herself in third person, as it's typical for small children to do.
- Token Mini-Moe: She's a three-year-old little girl in a cast full of adults and teenagers.
Maria von Granzreich
- Voiced by: Kazuko Sugiyama (Japanese); Linda Leonard (English)
The Queen Mother, she's the first royalty Heine meets when he arrives at the palace. Viktor's mother and grandmother of the princes and princess.
- Doting Grandparent: She adores her grandchildren and thinks they're the most wonderful in the world. Heine can even tell how doting she is when they first meet.
- Grande Dame: She is the mother of the King, and such position obviously comes with authority and wealth. However, unlike other examples who are strict, uptight or straight-up a Rich Bitch, Maria is simply an aged Proper Lady with a mix of Granny Classic.
- Morality Pet: Eins has a notable soft spot for his grandma as she's the only member of the family who he treats with respect and consideration.
- Pink Is Feminine: She's almost always seen in a pink dress.
- Prim and Proper Bun: Befitting her high status, she wears her hair in an elegant chignon.
- Shared Family Quirks: She and Viktor are both very emotional to the point of overdramatic when things involve their (grand)children. Though Maria seems to have better control over herself than her son.
Titania von Granzreich
The Queen of Granzreich, wife of Viktor and the mother of all the princes and princess.
- Bunny-Ears Lawyer: She acts easygoing and clumsy, something that doesn't give off the regal image of a queen and owner of a railway company as Heine points out. When it's time for her to work, she's a very competent and responsible manager.
- Cute Clumsy Girl: Said to be clumsy as she trips a lot when she is over-excited.
- Good Parents: According to her children, she seems to be a loving mother.
- Raven Hair, Ivory Skin: She has hip-length wavy dark hair, ivory skin and is a gorgeous woman.
- Royals Who Actually Do Something: She owns a successful railway company, as such, she's very busy with her work and often kept away from home most of the time.
- When You Coming Home, Dad?: Her job keeps away from the country a lot. In her introduction chapter, she hasn't been home for three years and missed the entire infancy of her baby daughter because of it.
Beatrix von Lothringen
Cousin to the princes and Kai's fiancee.
- Adapted Out: The anime skipped her introduction chapter, so she doesn't appear in any episode.
- Bifauxnen: At first, she tied her hair up and dressed in men's clothes, causing even Heine to mistake her for a young gentleman. Chapters after, she appears to look more feminine but still keeps her habit of wearing masculine clothing.
- Cool Big Sis: She is one to the younger princes, having looked after them when they were younger.
- Dogged Nice Girl: She is persistent in trying to spend more time with Kai to demonstrate her love for him, but he appears to be Oblivious to Love.
- Hates Wearing Dresses: She dislikes wearing frilly dresses because she doesn't think they look good in her.
- I Am Not Pretty: Beatrix believes that, since she is tall and not feminine enough, she does not fit Kai's standard of cute things.
- Kissing Cousins: She is engaged to her cousin Kai.
- Like Brother and Sister: She worries that this is the type of relationship she has with Kai, when she clearly wants to do more romantic things with him.
- Perfectly Arranged Marriage: She is quite enamored with Kai and is content to be his fiancee. Her only concern is that she isn't sure if Kai likes her romantically too.
- Satellite Love Interest: Every chapter focused on her is about her attempts to make Kai see her womanly charm or wanting to do something romantic with him, only for Kai to not get it. It doesn't help the number of chapters she appears in can be counted in one hand.
- She Cleans Up Nicely: After the picnic, the Queen Mother offers her a change of clothes into a frilly dress that Beatrix thought she'd look absurd in. However, in truth, she's goddamn gorgeous and even Kai looks impressed.
- Through His Stomach: Beatrix attempts to make Kai's lunch during their picnic to show her more feminine side to him. Unfortunately for her, Kai's grandmother prepared lunch for them.
- Tomboy with a Girly Streak: She's often mistaken as a gentleman due to her courteous manners and choice of dress. However, Beatrix displays a very girly yearning for romance with Kai and wants to make him see her as a woman.
- Wholesome Crossdresser: She wears men's clothing to avoid wearing dresses.
Servants
Maximilian Rosenberg
- Voiced by: Shinnosuke Tachibana (Japanese); Dallas Reid (English)
One of the palace guards. He comes from a well-off family and is the cousin of Count Ernst Rosenberg.
- Genius Ditz: He's usually rather silly, but he's also reputed as the strongest swordsman among the guards.
- Red Oni, Blue Oni: The cheerful red oni to Ludwig's serious blue oni.
- Those Two Guys: With Ludwig. They always accompany each other and are the ones who usually chaperone the princes whenever they head out of the palace.
Ludwig Steiner
- Voiced by: Daisuke Namikawa (Japanese); Jarrod Greene (English)
One of the palace guards.
- Big Damn Heroes: Subverted. He tries to be this after Kai and co. are captured by Fuchs, but he arrives just a nick too late, as Heine has already taken care of everything.
- Red Oni, Blue Oni: The serious blue oni to Maximilian's cheerful red oni.
- Those Two Guys: With Maximilian. They always accompany each other and are the ones who usually chaperone the princes whenever they head out of the palace.
Ernst Rosenberg
- Voiced by: Takuya Eguchi (Japanese); Joel McDonald (English)
Eins's high steward. He has been behind many of the obstacles the four younger princes encountered in their path to the throne.
- Bastard Bastard: Downplayed and eventually subverted. He's the illegitimate son of a count and plays the role of a manipulative antagonist for a good part of the series, but his nature isn't one that can be called evil or malicious.
- Because You Were Nice to Me: When he was a child, Ernst didn't know the first thing about being a nobleman because he lived as a commoner in his early childhood and picked fights with Eins hoping he would be praised if he won. Instead of fighting him, Eins taught Ersnt everything he would need to know to be a count and a gentleman, shaping him into who he is today. Out of gratitude, Ernst made the decision of making Eins the king because he believes Eins can do the same good he did for him to the country.
- Beneath the Mask: He acts like a perfect gentleman now, but his true self is an irritable and abrasive guy with poor manners. Eins taught him everything he knows about etiquette and shaped him into a proper count, but he drops the act and goes back to bad habits during moments of stress.
- Berserk Button: The only time he drops the nonchalant act and becomes openly hostile is when Heine mentions Viktor doesn't consider Eins a suitable successor to the throne.
- Bitch in Sheep's Clothing: He acts friendly and polite, but is actually very manipulative and crafty, causing troubles to the other princes.
- Childhood Friends: He has been friends with Eins since they were around 11 years old.
- Classy Cane: He's almost always seen carrying a cane. Since he obviously doesn't need it, he's only trying to look classy as a count should be.
- Heterosexual Life-Partners: He has been by Eins' side since they were children and has made it his goal to see the day Eins is enthroned as king come true.
- Jerk with a Heart of Gold: He's shady as hell and definitely antagonistic towards the main characters, especially Heine, because he views them as enemies in his goal of making Eins the king. However, his motives for making Eins king aren't based on something like greed or wish for status; he's genuinely loyal to Eins who is a dear childhood friend of his and respects his qualities as a leader. Eventually, Heine and the other princes make him understand he shouldn't see them as enemies that he should get out of the way, but rivals who respect and support each other, which leads Ernst to ask their help in handling Eins' depression.
- Manipulative Bastard: Throughout the story, Ernst has seen to be manipulating behind the scenes to trip the four other princes. Exposing Licht's job to Viktor, allowing a Professor faraway from the palace to invite Bruno to leave the palace and study alongside him, there’s almost nothing he cannot do. When Heine proves himself to be an obstacle, he even contacted Queen Titania in order to drive Heine out of the palace.
- Perpetual Smiler: He keeps many secrets under his never-shut-down smile.
- Rage Breaking Point: When he's finally convinced to let Heine and the princes visit Eins so they can understand what's happening to him, Eins isn't answering the door at his bedroom. Ersnt gets fed up of it and reverts fully back to his old violent self and kicks down the door only to find out Eins ran away.
- Red Eyes, Take Warning: His deep red eyes make him look unsettling.
- Royal Bastard: He's the illegitimate son of a count who took him in out of need for an heir.
- Secret-Keeper: For a long time, he's the only one who knows the truth about Eins' "condition" that drives him to lock himself at his bedroom for days. It's because Eins is depressed due to a broken heart and disappointment with himself for not being about to get over it and look for a new fiancée.
- Undying Loyalty: Towards Prince Eins. When Ernst wanted to prove to his father that he is the rightful heir to the Rosenberg family despite being illegitimate, Eins helped him study and taught him the manners he needed to have as a noble and one day he succeeded as the next Count. This is why he is very adamant to return the favor and make Eins the next king.
- Vicariously Ambitious: He wants Eins to be king and tries sabotaging the other princes so that Eins stays the best candidate to the throne.
- Villain in a White Suit: Ernst is a good-looking gentleman who's always dressed well in white attire, complete with a top hat. And he's so far the biggest threat to both the princes and Heine.
- White Hair, Black Heart: White/light pink hair, and as much as he may deny it, it's clear he's involved in trying to sabotage the four princes.
Others
Cafe Mitter Meyer's Owner
- Voiced by: Katsuyuki Konishi (Japanese)
The owner of Cafe Mitter Meyer.
- Benevolent Boss: He's strict but reasonable to his employees.
- Everyone Calls Him "Barkeep": He's always referred to as "the cafe's owner" or "master".
- Married to the Job: That he has no time for a relationship is a long-running gag that the cafe employees use to poke fun at him.
- Nice Guy: He's noted to be a very good guy, hence why Heine is unconcerned about leaving Licht under his care.
- Secret Secret-Keeper: When Licht finally quits his job and reveals himself as a prince, the master reveals he already knew for a long time because the king revealed his real identity when Licht's job was first found out.
Dr. Dmitri
- Voiced by: Hiroki Takahashi (Japanese); Kent Williams (English)
A professor in the field of sociology from Orosz, whom Bruno highly respects.
- Bunny-Ears Lawyer: Far more jovial than Bruno (and Ludwig) expected him to be, but still a well regarded professor.
- Idiot Hair: Has a strand of hair sticking out at the top of his head. He, while a Bunny-Ears Lawyer, is anything but an idiot however.
- Smart People Wear Glasses: He's a brilliant professor who wears glasses to show he's smart.
Smerdyakov
- Voiced by: Shinya Hamazoe (Japanese); John Swasey (English)
Dr. Dmitri's assistant.
- Beleaguered Assistant: He has to put up with Dr. Dmitri's antics.
- Real Men Wear Pink: He can appear rough, but the sandwiches he makes are surprisingly cute, complete with animal decorations.
- The Resenter: He admits that he's jealous of how Bruno can follow in his father's footsteps whereas he broke off ties with his family to pursue his dream of becoming a scholar—though he knows this is petty of him, and he assures Bruno that he doesn't actually hate him.
- Sugar-and-Ice Personality: He comes off as rather cold and intimidating, but he's actually a fan of Bruno's work and, after clearing up the air about not hating him, does try to be a bit warmer.
- Supreme Chef: He's a very good cook.
Ralf von Fuchs
- Voiced by: Keito Okuyama (Japanese); Justin Briner (English)
A son from a noble family who attended military academy at the same time as Kai and Bruno.
- Bitch in Sheep's Clothing: When Kai wants to talk, Ralf presents the image of a subdued, repentant young eager to make amends, but it's quickly revealed to one big, damn lie.
- The Bully: He bullied Bruno at the military academy.
- Disinherited Child: His family disowned him after what he did, fearful that the scandal would ruin their reputation.
- Hostage Situation: He tries to hold Kai, Heine, and Maximilian hostage for ransom.
- The Resenter: Towards Bruno in military school for being royalty.
Elmer von Bismarck
A son of a minor noble family.
- First Friend: He's the first friend Kai makes upon returning to military school.
- Satellite Character: He's a classmate and friend to Kai, but never receives relevance or characterization besides that.
- Shrinking Violet: During his visit to the castle, he's quite timid and nervous about making a good impression on the royal family.
Claude
The prince of Fonsein and the fiancé of Princess Adele.
- Arranged Marriage: His parents and King Viktor plan for Claude and Adele to get married when they grow up. Although, nothing is set in stone until Claude and Adele can consent to it. Claude states he does like Adele as a friend, but obviously is still too young to even think about romantic love yet.
- Big Brother Worship: He sees Leonhard as an older brother and greatly looks up to him.
- Nice Guy: He's a very polite, gentle, and considerate boy.
- Wise Beyond Their Years: He's noted to be very mature for a boy of his age.
