On Kiyo's fourteenth birthday, a naked child crashes through his window, riding an eagle with a tuna on his back (no, we're serious). Zatch Bell is an amnesiac child with a red spell book, and one of one hundred contenders in a tournament to decide the king of the demon world for the next thousand years.
Despite Zatch's small stature and shy nature, he has the heart of a hero and is empathetic towards every living person and thing. He wields the Power of Lightning, weaponized via shooting it out of his mouth. Notably, Zatch goes unconscious when he fires, initially making it very hard to aim despite its destructive power.
- All Your Powers Combined: Against Clear's final form, his book turns golden and all the defeated demons show up to lend their support, and in several cases, their spells. Saying it's awesome is an understatement.
- Amnesiac Hero: Even his name is a mystery to him at first.
- Badass Adorable: Most demons are, but Zatch is especially cute and, after gaining some experience, exceptionally badass.
- Berserk Button: In general, Zatch despises mamodos who gleefully abuse their power and influence on others, especially those looking to take advantage of being king.
- Beware the Nice Ones: When in the proper mood, he's a force of nature.
- Big Eater: Like most mamodo, he's more than capable of eating an animal whole, bones and all. Cooking is optional.
- Boring Invincible Hero: A surprising subversion. Despite being way stronger than he appears, and racking up more victories than every other demon child, he actually loses several times. First to Zeon (before he met Kiyo), then to Brago, then Bari, and finally Riou. It was thanks to various circumstances that the book didn't end up being burnt. And even then, the victories he does get aren't easy and Kiyo and he don't come out unscathed, heck a few time they're nearly beaten to the brink of death. They've also a number of technical losses, such as the fight against Shinichi and Eshros - Shinichi ends up with Kiyomaro's book after the clash of Guranbaison and Zakeru, but accepts his 'win' as his personal growth, casts aside Eshros, and returns their book to let them send him home.
- Breath Weapon: Most of his spells are projected from his mouth.
- Cain and Abel: The Abel to Zeon's Cain.
- Clothes Make the Superman: While Zatch is fairly powerful on his own, he learns the secrets of his regenerating, shielding mantle late in the story.
- Curtains Match the Window: Blonde hair and gold eyes.
- Death Glare: Enough to stun the badass Bari.
- Determinator: Giving up is about the only thing he can't do. The few battles he's ever lost were ones where he was physically unable to continue. Even when faced against the seeming invincibiity of Clear Note, he refused to give up. This determination inspired the defeated Mamodo to lend him their power to finish Clear Note.
- Dynamic Entry: How he's introduced to the series: Hang-gliding straight into Kiyo's bedroom window.
- Easily Impressed: Blowing his mind is a piece of cake. In one of the first episodes, Kiyo is able to captivate him with a toy make of a noodle box and chopsticks.
- Elemental Eye Colours: He has gold eyes and electric powers.
- The Good King: It's his goal to become one by winning the tournament.
- Go Through Me: Zatch takes a lot of hits to protect Kiyo. The one time Kiyo explicitly tells Zatch not to do this, Kiyo dies.
- Hair of Gold, Heart of Gold: In noticeable contrast to his white-haired twin brother.
- Keet: He's a fun-loving and exciteable child.
- Kid Hero: He's no more than 8 years old.
- Kryptonite Factor: Due of the intensity of Zatch's spells, he usually passes out when performing them, making it hard to aim. Because of this Kiyo needs to be sure that Zatch is focused on his target before performing the spell. He normally does this by pointing at his target right before casting the spell.
- Laser-Guided Amnesia: Zeon stole his memories to make sure he suffered in the human world, constantly attacked without knowing why.
- Limit Break: Baou Zakerga tends to be the finishing move and it is quite powerful, especially in its true form. He got it from his father, King Bell.
- Magic Pants: As it turns out, his mantle actually is magic, giving it the ability to stretch to any size while also capable of self-repair. A gift from his father, the King. Zeon got it too.
- Magnetic Hero: And we don't just mean Jikerdor.
- Naked First Impression: With Kiyo.
- Naked on Arrival: Right into Kiyo's bedroom.
- Naked People Are Funny: Big time.
- Oblivious to Love: Really gets him into trouble with Penny, who thinks he's trying to insult her. His Laser-Guided Amnesia doesn't help matters. He also misses the pretty obvious signs that Tio has a crush on him, which literally everyone else notices.
- Obsessed with Food: A minor running gag in the series is Zatch mistaking names for food (e.g. Mafia=Muffin and Hallburg Castle=Hamburger Castle).
- Our Dragons Are Different: His strongest attack spell, "Baou Zakeruga", which condenses into a huge electrical dragon.
- Power Glows: His physical enhancement spell, "Rauzaruk".
- The Power of Hate: Baou Zakeruga's true power was only unlocked through Zatch's seething hatred towards Riou, for killing Kiyo. Also deconstructed Big Time. While Baou's true power was unlocked by Zatch's hate, it also begins to consume him and threatens his life. Indeed, this is why King Bell gave it to Zatch in the first place. His usage of Baou in the previous war turned it angry and monstrous. Zeno, who was born with the King's former rage, would be destroyed by the spell and gave it to the more kind-hearted Zatch. Indeed, Baou feeds on hate and consumes spells born from it. Zatch ends up purifying Baou and having it rediscover its power to end hate in the first place. This is shown when it defeats Zeno's ultimate spell, which was born from his and Dufort's hatred, by consuming it, and thus taking away their hate.
- Sensor Character: Gains the ability to sense other demons after the training with Dufaux.
- Shock and Awe: His primary element.
- Super Mode: Rauzaruk, the sixth spell, enhances Zatch's strength and speed exponentially for thirty seconds, at the cost of not being able to use any other spells. Thankfully Kiyo figured this out pretty quickly. The Golden Book in the final chapters, which allowed Gash/Zatch to use souped-up spells of past mamodo who were already defeated.
- Super Strength: True of all demons, but most obvious with Zatch, who stopped Pamoon's strongest spell with his body alone.
- Took a Level in Badass: Grows far more formidable over the course of the series. Even Brago takes note during their final battle.
- Trademark Favorite Food: Yellowtail tuna.
- Verbal Tic: 'Unu!' in the Japanese version. This was apparently a way of royalty speaking, started after finding out who his real family was
- What Happened to the Mouse?: Seriously, where the hell did that eagle come from? Where did it go? Are they still friends?
The main human protagonist. Kiyo is a brilliant boy, although arrogant and antisocial. When Zatch drops into his life, everything he knows changes, and his life gets a lot more exciting...
- Academic Athlete: Near the end of the series, he's athletic enough to break school records and is still the smartest around.
- Awesomeness by Analysis: With an IQ of 180, this is his own special skill. Later on, when he gains the Answer Talker this is only amplified.
- Back from the Dead: He is in fact dead for a short period, only has his heart restarted by an emotionally broken Zatch pounding on his chest, and even that isn't enough. It also takes a lot of Saifogeos and a long dip in restorative Faudo juice before he wakes up, and his allies take a lot of damage by then.
- Big Damn Heroes: At the end of the Faudo saga, when he finally comes back.
- Brilliant, but Lazy: At the beginning of the series, he chooses not to go to school, in part due to bullying and in part because he's so smart it's a triviality. He is a serious student when he goes back though it is interpreted as lazy by one of his teachers.
- Bystander Syndrome: At the start of the series, his biggest flaw was that he constantly talked himself out of doing the right thing when he saw someone in trouble. Zatch's influence breaks this entirely, and by the third chapter, he's got Chronic Hero Syndrome.
- Butt-Monkey: On a lot of occasions.
- Came Back Strong: When he came back form the dead, he unlocked the Answer Talker, a strange psychic ability that allows one to answer every question. This made him much more dangerous to deal with. Additionally, he gained a near-bottomless amount of Heart Energy and a whopping seven new spells.
- Charles Atlas Superpower: All of the physical strain that the demon fights put Kiyo through seriously beefs him up. By the end of the series, he's shattering his school's athletic records and pulling off feats of strength on par with Zatch.
- Death Glare: On par with Zatch's. Possibly the true reason they make such good partners.
- Demon Head: His angry face takes the form of a giant oni mask. Taken to epic levels in the final fight with Rodeaux.
- Determinator: Matched only by Zatch in this department; even his own death isn't enough to stop him.
- Heroic Sacrifice: Performed in the battle against Riou/Leo.
- Informed Flaw: His Jerkass / Insufferable Genius tendencies early on tend to be quite informed since his classmates were equally rude to him. And according to his father, once middle school came around and kids realized how much smarter than them Kiyo is, they shunned him.
- Jerk with a Heart of Gold: He's arrogant and short-tempered, but a good guy deep down.
- Loner-Turned-Friend: To just about everyone in his school. Once he comes out of his shell, he's surprisingly good at making friends.
- Nightmare Face: Gains a disturbing demonic face with fangs and horns whenever he's really enraged.
- Oblivious to Love: Both Suzume and Megumi have feelings for him. Kiyo has no clue, one of the only areas where his intelligence fails him.
- Only Sane Man: Often when faced with the antics of the rest of the group.
- Reed Richards Is Useless: Subverted, once he gains the Answer Talker power and has some downtime to ponder it, his first ideas are how he can help the rest of the world with it.
- Took a Level in Kindness: Starts out as an ill-tempered Jerkass to soon become a Jerk with a Heart of Gold. More obvious after character development. By the end of the series, he's a Nice Guy who only gets mean if angry or frustrated.
- Younger Than He Looks: He don't look like a middle school student.
The main heroine, she becomes one of Zatch's first allies and is the combat medic of the group. Despite her violent tendencies, she cares deeply for her friends and views Zatch as a source of strength. She helps Megumi in her idol job by keeping track of events. Has the Power of Shields/Healing, which embody themselves with angelic designs.
- Attack Reflector: Giga Ra Seushiru traps the enemy in a barrier that reflect their spells back at them.
- Barrier Warrior: Her spell theme. Her attack spells are either weak or situational, but she has the most powerful defensive spells of all of the demon children.
- Berserk Button: When people look at her panties. It was enough to awaken her strongest attack spell, which is completely fueled by anger and hate.
- Combat Medic: Both used and averted. She does have attack spells, but the first is incredibly weak, the second is an Attack Reflector that can be broken if the opponent's attack is too powerful for it to handle, and the third is a Cool, but Inefficient attack that requires her to be extremely angered to be used.
- The Dreaded: She's notoriously known to be a bully in the demon world, and well deserving of her nickname.
- Fiery Redhead: Her nickname in the demon world is "Tia the Strangler," for reasons that become obvious in her interactions with Zatch.
- Goofy Print Underwear: And if you see them, you will regret it.
- Healing Shiv: Saifogeo, a giant magical sword that heals whoever it stabs. Really.
- Little Miss Badass: She's a little girl who can tank the enemy's most powerful spells, and routinely throttles poor Zatch, although the last one is Played for Laughs.
- The Medic: Falls into this role once her Saifogeo spell is revealed.
- Meditating Under a Waterfall: She uses this to power up her defensive abilities and gain access to her strongest spell.
- The Power of Friendship & The Power of Love: Chajiru Seshirudon, a barrier powered by her desire to protect her friends.
- The Power of Hate: Chajiru Saifodon, an attack spell powered by her rage and hatred.
- Rescue Romance: She hated Zatch in the demon world, but when he saves her from Maruss, she falls for him almost instantly. Not that she'd ever admit it.
- Shipper on Deck: She seems to ship Kiyo and Megumi, noticing with a smile when Megumi once blushed at being called Kiyo's girlfriend.
- Ship Tease: Near the end of the series she finds herself oddly excited at the prospect of seeing Zatch the next day.
- Single Woman Seeks Good Man: Her growing attraction to Zatch, because he is a kind-hearted, compassionate and caring individual.
- Stone Wall: Her attack spells are much weaker than average with her basic Saisu spell being near useless against Mamodo. However, she makes up for this with multiple shield spells and the ability to heal damage.
- Tsundere: Mostly with Zatch, who she has a crush on but also wants to strangle. With everyone else, she's pretty sweet all the time.
- You Gotta Have Blue Hair: In the anime, where she had pink hair. The author Makoto Raiku, in the other hand, depicts her as red-haired in the color spreads and volume covers.
A Japanese pop idol, she is Tia's partner. She enjoys being an idol, but also appreciates the moments of normalcy with her friends.
- Betty and Veronica: Veronica to Suzy's Betty because she's an idol singer Kiyo met during the tournament.
- Cool Big Sis: Especially to Tia.
- Defeat by Modesty: Narrowly averted in the Faudo arc; she nearly refuses to say Abhorrent Admirer Unko Tin-tin/Poosophagus's name as part of a gag test of wisdom.
- Idol Singer: Her profession is singing to crowds, which is also how she was attacked the first time. They tried to sneak in from back stage.
- Only Sane Man: Alongside Kiyo, though she's the sort to get amused while he gets angry.
- Rescue Romance: It's pretty clear she fell for Kiyo the second he showed up to save her and Tia from Maruss.
- Ship Tease: With Kiyo. The anime had more frequent moments of hinting at Megumi's feelings toward Kiyo. However, the manga did have one very prominent moment when Kiyo needed mouth-to-mouth and Megumi looking very gleeful at the chance to lock lips with him, with Tia even telling her its her opportunity.
The first of Zatch's allies, he serves as Comic Relief. Despite his timidity, he fights alongside his friends and desires to be stronger. Has the power of Illusions, which usually change his body in some form.
- Beware the Nice Ones: Particularly invoked in his fights with Bago and Goomu. He's a softie most of the time, but give him a reason to fight, and he's absolutely relentless. Especially in the latter case, where he's drunk on the power of his strongest spell.
- Beware the Silly Ones: Kanchome's apparently useless power and ridiculous demeanor make him easy to underestimate. It's almost always a bad idea especially after his training with Dufort.
- Big Brother Instinct: With Rusca, a little girl who he befriended while he got strayed in a rural village in Spain.
- Cowardly Lion: He's a giant coward and a crybaby to boot, but he'll always swallow it when his friends need his help. Especially when his stronger spells give him more confidence.
- Delicious Distraction: Candies, which actually led him to nothing but trouble.
- Heart Is an Awesome Power: Once he figures out how to use his powers correctly, they're useful, as he and Folgore figure out that Kanchome's power isn't shapshifting and transforming, but illusions. Kanchome's illusions are vital to a number of victories, and once he develops stronger techniques, he's arguably the strongest demon in the series. His 3 final spells allow him to trick a foe into cancelling their attacks (by making them think the spell failed), use their own attacks against them (albeit only that paritcular mamodo) and most powerful, his illusion world, where the pain is real (at least through mental truama.) During a training session, he managed to beat Zatch.
- Magikarp Power: His spells are poorly suited for offensive purposes, and in the hands of two fools like Kanchome and Folgore, they're borderline useless. Through the power of hard work, training, and some direction from their friends, Kanchome becomes increasingly stronger through the tournament. By the time he's reached the King Festival he's possibly become even stronger than Clear, as he has access to an unblockable Your Mind Makes It Real Mind Rape attack.
- Master of Illusion: Particularly his final spell, which traps the target in a full illusionary world with no escape.
- My Greatest Failure: Kanchomé often feels weak when fighting alongside his demon friends, especially during the Ancient Mamodo Arc when he and Kido were fighting Belgim EO. Kanchomé blames himself for Kido's book being burned by Belgim EO as result of his weak powers and also for when Folgore almost died in the Faudo arc fighting against Keith.
- Oddball Doppelgänger: He can transform into replicas of other characters, but they're far from perfect. One had a nose that would make Cyrano De Bergerac feel normal and another has a forehead as big as the torso. Luckily for him the people he had to fool were idiots
- Self-Duplication: The fourth spell, "Dima Buruk," produces a number of Kanchome clones, each with comparable speed and strength to a Rauzaruk-enhanced Zatch.
- Sensor Character: Gains the ability to sense other demons after the training with Dufaux.
- Sweet Tooth: He apparently lives entirely on candy and desserts.
- Took a Level in Badass: After several months of training with Dufort, he learns how to directly affect the opponent's mind, making his illusions unbeatable. He even beats Zatch in a practice match.
- What Kind of Lame Power Is Heart, Anyway?: Compared to Zatch's electrical powers, Tia's shielding and healing abilities, and Ponygon's super-speed armor, transforming into something without any boost to stats seems a bit lame. Then we see how strong his illusions really are...
- With Great Power Comes Great Insanity: His strongest spell began making loony until Folgore snapped him out of it.
- Wrong Genre Savvy: Initially, Kanchome and Folgore believe that Kanchome's power is shapeshifting, with Kanchome's first two spells either transforming him into imperfect doppelgangers or shrinking him into the size of a mouse. It's revealed later on, starting with his third spell, "Dika Poruk", that his powers are actually illusions, as "Dika Poruk" creates an illusionary version of a giant Kanchome with the real Kanchome hiding from behind.
An Italian pop sensation, he is Kanchome's partner. Famous and loved, he serves as Comic Relief alongside Kanchome, but knows how to be serious.
- Agent Peacock: A flamboyant pop-singer with questionable taste in clothing and more endurance than a mamodo.
- Animal Motif: Minor example, but he mentions being like a hippo rather than a lion as Kanchome said. Turns out there is a reason for this comparison; he viewed his fierce and aggressive past life as being like a lion, which resulted in him being kicked out of his hometown at gunpoint. He changed himself to the goofy pop star we all know when in a nearby town, he saw a documentary on hippos. He noted how despite their large appearance, birds were not afraid to be with them, showing his change to becoming an approachable and goofy person, yet still someone quite strong, stronger than even lions are. Truth in Television since hippos are indeed more dangerous than lions despite their goofy exterior.
- Bowdlerize: 'Chichi wo moge/Groping Breasts/Pick the Boobies' becomes 'Hey Hey Let's Dance All Day'.
- Butt-Monkey: Bordering with Iron Butt Monkey due to all his comic injuries.
- Clothing Damage: Of the comic variety. Usually it's the back of his pants ripping, giving the audience a faceful of his bare naked ass.
- Crouching Moron, Hidden Badass: Once we find out his origin story.
- Dark and Troubled Past: Was a feared juvenile delinquent who beat up anyone in his way. It led to being feared by his hometown and being kicked out by his own parents at gunpoint. His very goofy personality is shown to be a deliberate change from his fierce and serious self from when he was younger. He even compares his younger self as a lion and now as a hippo.
- Death Glare: When he gets serious, his eyes take on the same designs as Gash, Zeon, and Ashuron to show his incredible willpower.
- Delinquents: Used to be a feared one in his hometown.
- Determinator: It's pretty much impossible to get him to stay down. He's Iron Man Fulgore!
- Goofy Print Underwear: Added in the dub to hide his original bare ass via clothing damage.
- Handsome Lech: A bit of a perverted yet very handsome fellow who enjoys his legions of fangirl.
- Hidden Depths: Sure he's a notorious womanizer, but he always finds time to visit sick kids in the hospital for a special performance. He also showcases considerable strength of will for a preppy pop star and has a strong heart befitting a good partner to a Mamodo. Not even counting his past as a delinquent...
- Idol Singer: He's an Italian one at that. Although it's implied that he's more popular in Japan than his home country.
- Lovable Sex Maniac: Come ON, his most popular song (in the original Japanese) is about boobs!
- Made of Iron: He invariably takes more damage than Kanchome when the two are in battle. It never seems to slow him down for very long.
- Never Accepted in His Hometown: To the world, he is a world-famous popstar and a friend to children. To his hometowen, he was a feared juvenile deliquent to where his parents forced him out at gunpoint. He himself mentions that to this day, they're still afraid to talk to him.
- Sad Clown: On the surface, he is a well-meaning but mildly annoying pop star who brings in a good deal of laughs. Dig a bit deeper and you find he is a remorseful man who feels a great deal of pain over his past life as a delinquent and sadness that because of his past choices, he will never be able to return to his hometown or recouncile with his parents.
- Theme Music Power-Up: When Kanchome sings "Iron Man Folgore," Parco rises up to fight once more despite his injuries. This is subverted after Kiyo casts Zakeru several times, and he finds himself too numb to try and stand up again. The manga has him look fearful of Kanchome's singing and tries to crawl away.
Zatch's best friend from the Mamodo World, and a horse. When he first appears, he still hasn't found his partner, and spends most of the first few arcs living with Zatch and Kiyo while getting into wacky hi-jinks trying to find his book's owner. His power, when he finally meets his partner, is Armor (specifically, Fire Armor), which gets stronger with each spell. His real name is Schneider, but seeing as he's a horse that can't talk, ends up getting stuck with the name "Ponygon," much to his annoyance.
- Adaptive Armor: His ultimate armor spell in the manga can shapeshift.
- Boring, but Practical: His true forte is speed. Sure it's not as flashy as throwing lightning bolts, but he can dodge almost anything and hit pretty hard thanks to it.
- Cowardly Lion: He initially didn't want to find his partner due to a fear of battle. He gets over it when his friends need him to step up.
- Fire-Forged Friends: He hated Zatch when they first met, until Zatch helped him save his father's life. He also hated Kiyo when he arrived in the human world since Kiyo was already Zatch's partner, and so Umagon had no reason to befriend him until he found his partner, Kafk Sunbeam, and they started fighting alongside Zatch and Kiyo.
- Good Is Not Nice: It's perhaps indicative of the seriousness of the situation, but during the fight to stop Faudo, Ponygon attempts to defeat the stronger Rodeaux by broiling his partner alive.
- Heroic Sacrifice: Runs himself almost literally to death bringing Zatch to the final battle with Clear Note. Sunbeam has Megumi burn his book before he actually dies.
- How Do I Shot Web?: At first he has a hard time controlling his flames, often burning Sunbeam on accident.
- Instant Armor: The effect of every spell he learns.
- Meaningful Name: Invoked by Kiyo, who disliked him at the time, by giving him the name Umagon. Roughly, it means "horse monster".
- My Name Is Not Durwood: He keeps trying to tell everyone his name is Schneider, but nobody understands him. Once they are back to the demon world, he has grown fond of the Umagon/Ponygon name, even though everyone already knows his real name.
- Playing with Fire: While the third spell is activated and his armor specialty.
- Sensor Character: Gains the ability to sense other demons after the training with Dufaux.
- Took a Level in Badass: His book owner was late to the party, but once he showed up...
- The Unintelligible: To everyone but Sunbeam and fellow horse Karudio, though Sunbeam still can't understand his name and Karudio never tells anyone because he's sort of a dick like that.
Ponygon's partner, he is a automobile engineer from Germany. One of the older members of the group and one of the few to understand Ponygon (albeit not able to figure out his name.)
- Adults Are Useless: Awsomely defied since he's one of the older contenders in the fight, and holds himself to the ideal of being a "cool adult" (i.e. an adult who is reliable and trustworthy).
- Catchphrase: "GROOVY!" and "ROCK 'N ROLL!"
- Continuity Nod: In a breather chapter, everyone is trying to learn to ice skate, but all fail spectacularly. Sunbeam is especially livid banging and cursing the ice (as it wasn't that much later from his fight against Sauza and Karudio.
- Friend to All Living Things: Animals love him, and he can understand their thoughts. Indeed, part of his and Ponygon's training was in Africa. The epilogue shows him living on an African animal sanctuary while helping to start automobile factories in Africa.
- Germanic Efficiency- A mild example. Sunbeam is a German engineer, specializing in automobiles. The epilogue shows him helping out by starting automobile factories in Africa.
- Gratuitous English: Very fond of random English words in the Japanese version.
- Ship Tease: With nun and fellow book holder Elle Chivas. The epilogue shows she's living with him in Africa.
One of the strongest Mamodo ever, he is a sullen and serious contender. He mellows a bit in the tournament and gains more drive. He strives to be a 'strict, but kind' king. His power is Gravity.
- Always Someone Better: No matter how strong Kiyo and Zatch get, they're always looking at Brago's back, and they know it. Fortunately, Brago is content to let them try to close the gap before they fight for real.
- Big Eater: Most mamodo are. But he is seen eating a whole crocodile. Raw. And he finishes the whole thing before Sherry is even halfway through her own meal.
- Casting a Shadow: His powers actually manifest as gravity manipulation.
- Dark Is Not Evil: Brago is visually terrifying, no doubt, but he's far from evil.
- The Dreaded: He's pretty feared among the mamodo as a scary guy. They're right. He is also one of the Four Prodigies, four mamodo children so mighty that only adults could fight them. The others are the two dragon siblings and Zeon.
- Good Is Not Nice: Even after he mellows out, he's aggressive, ruthless, and aloof. Part of it is a Jerkass Façade, but mostly that's just the way he is.
- Gravity Is Purple: Most of his spells are either black, purple or both.
- Gravity Master: All of his spells are based on gravity.
- Hero of Another Story: He and Sherry are already veterans of the Mamodo War when they first encounter Zatch and Kiyo and it's clear that they've had more than their share of adventures of which we only see snippets of. Their paths generally cross with Zatch and Kiyo on occasions but it isn't until the final arc that they choose to work together with them.
- Jerk with a Heart of Gold: In his initial debut, he comes off as generally rude and doesn't think highly of humans until he undergoes some Character Development. By the end of the series, the "Jerk" part has mostly faded. He desires to become a strict, but kind king. When Zatch grows stronger, he acknowledges it without a hint of anger.
- Jerkass Façade: He acts as though Sherry's weakness frustrates him, but he cares for her far more than he lets on. He actually does manage to be openly affectionate towards her as his book is burning.
- Mundane Utility: His Reisu spell, basically a ball of physical gravity, is used more than once to push people to a safe spot.
- Names to Run Away from Really Fast: The demon of the black book is an intimidating description.
- One-Man Army: He basically solos the bulk of Zofis' thousand year old demon army, and the only reason he has any trouble at all is the need to separate the brainwashed masters from the crowd before he can use his stronger spells.
- The Rival: Towards Zatch, eventually. For most of the contest Zatch and Kiyo view Brago as the man they have to surpass to win. By the time they fight Brago has come to see Zatch as a Worthy Opponent rather than a runt
- Sensor Character: He has a sixth sense that has helped him find other demons.
- Sociopathic Hero: Generally rude and doesn't think highly of humans. He even threatened the life of Sherry's butler once. To remind, Brago is no more than 15. Subverted after plenty of Character Development.
- The Stoic: Generally doesn't react much to anything.
- Super Strength: Is monstrously strong even for a Mamodo to the point of being fully capable of defeating weaker Mamodo without using spells at all. The anime even shows Brago overpowering a Rauzaruk enhanced Zatch with ease.
- Took a Level in Kindness: In a flashback it's revealed that Brago used to be much more violent and aggressive than he is now and firmly believed that Virtue Is Weakness and that The Power of Hate was the only way to awaken the spellbooks true power. When he first met Sherry he had no problem hitting her when she acts in a way that he perceives as weak and even threatened to kill her butler if she wouldn't listen to his demands.
- Training from Hell: He went through some unspecified "Elite Training". Whatever it was, it was enough to make him one of the favorites to win the battle.
- Villain Respect: After Zatch takes massive levels in badass Brago comments on it without a hint of anger.
- The Worf Effect: Is one of the strongest contenders of the Mamodo War and has dominated almost every battle he's participated in. Consequently, him getting utterly thrashed by Clear Note shows just how dangerous Clear is.
An 18 year-old heiress from France, she is Brago's partner. Initially a reluctant alliance, she only joins so she could rescue her best friend. She serves as an aloof ally, and it's revealed she had a cold and harsh upbringing. However, she does warm up considerably and comes to view Brago as her friend.
- Abusive Parents: Sherry's mother, at least. She was immensely overbearing and forced a load of work and practices upon a very young Sherry. Her father's whereabouts are unknown. Her mother was so abrasive and disapproving that Sherry once attempted to kill herself.
- Badass Normal: Unlike other bookeepers, who usually just stand back and casts spells, she joins the fray as much as Brago, usually fighting the opposing bookeeper.
- Charles Atlas Superpower: She starts off about as tough as you'd expect a genteel 18 year-old girl to be. After training herself to keep up with Brago, she's tough enough to floor some Mamodo.
- Childhood Friends: Koko was her first friend as a kid and saved her life. Enough for it being her sole motivation in the Mamodo fight (at least until Character Development.)
- Defrosting Ice Queen: She warms up considerably to Kiyo and the rest of the group.
- Hero of Another Story: She and Brago are already veterans of the Mamodo War when they first encounter Zatch and Kiyo and it's clear that they've had more than their share of adventures of which we only see snippets of. In particular Sherry's quest to save Koko is her primary motivation to win the war and what parts of their adventure we do see tend to be devoted to seeing her reaffirming that. Their paths generally cross with Zatch and Kiyo on occasions but it isn't until the final arc that they choose to work together with them.
- "I Know You're in There Somewhere" Fight: She struggles to wake Brainwashed and Crazy Koko, who insists that she turned evil out of her own free will.
- Interrupted Suicide: As a little girl, she couldn't take her mother's abuse and attempted to drown herself, but Koko saved her.
- Jerk with a Heart of Gold: Spares Zatch and Kiyo the first time because she ultimately feels that they share a similar motivation (trying to save their friend) and by tearing friends apart, she'd be no better than Zofis.
- Lady of War: In the middle of the series, she's body-slamming mamodo like it's nothing and all while wearing a frilly pink dress.
- Ojou Ringlets: As a sign of her rich-heiress status, her hair styled into ringlets even during battle.
- Rich Bitch: Sort of; she's not a snob, but she is kind of bitchy though her pretty cruel upbringing more than justifies that, especially since it led to a suicide attempt as a child.
- The Only One Allowed to Defeat You: To Zofis. She very candidly threatens Dr. Riddles not to so much as touch Zofis before she has a shot at him.
- Sixth Ranger: Among the main characters, she acts like this compared to the core 4 above.
- Stop, or I Shoot Myself!: When she first met Brago, when it became clear that he only saw her as a tool to win the war with and tried kill her butler to get his way she responds by coldly threatening to slit her own throat if he wouldn't comply with her orders, pointing out that he couldn't use his spells without her and making it clear that she was the one calling the shots here. It's implied that this event had such an impact on Brago that it was the beginning of his Character Development from a violent and selfish brute to a stern but noble warrior.
- The Unfettered: There are two things that matter to her: Saving Koko and making Brago king. Everything else is secondary, if that.
- Whip It Good: She has a cane for all purposes which doubles as a whip.
ApolloA rich, wandering bookeeper tied with his partner, Ropps. Ropps abilities consists of utilizing several strong chains, often with weapons on the end of them.
- Awesomeness by Analysis: Has an unspecified ability to predict incoming attacks.
- Badass Normal: He has high reflexes that enable him to dodge things most humans can't, such as shards of stone from an explosion and even Mamodo spells.
- Shipper on Deck: Refers to Megumi as Kiyo's girlfriend.
- Uncle Pennybags: He's the head of a financial group and is the one to provide the heroes with private planes and such for their battles.
- Walking the Earth: He was a wanderer before he met Ropes, after his book is burned he returns to his family's business.
- The Worf Effect: Fights Kiyomaro and Gash to a stand still and is later defeated by Zeon with contemptuous ease to show the latter's power. Dufort also proves this to Apollo's own Awesomeness by Analysis ability by nonchalantly strolling through one of Ropp's spells, showing how much stronger his Answer Talker ability is.
- Worthy Opponent: Considers Kiyomaro to be this before they fight, which is why he wanted to.
A teenage demon who falls in love with his partner, Li-en. His power is Martial Arts.
- Bare-Fisted Monk: His spells come in the form of powerful punches and kicks. And that's even before Li-en teaches him martial arts.
- Boxing Lessons for Superman: Li-en taught him Chinese kung fu, which he can use alongside his spells to devastating effect.
- Determinator: He will not give up.
- FaceHeel Turn: In the Faudo arc, to save Li-en from the curse. He changes back the moment it is lifted.
- Interspecies Romance: With Li-en. This is part of the reason her father disapporoves.
- No-Holds-Barred Beatdown: Unko Tintin kicks the absolute crap out of him.
- Star-Crossed Lovers: With Li-en. At first, her father does everything in his power to keep them apart, then the Faudo curse happens. Even when that's finished, however, both of them know that it won't last, given that Wonrei has to return to the demon world eventually.
- Unconscious Objector: At the end of their fight Unko Tintin isn't sure if Wonrei is still conscious or not.
- You Shall Not Pass!: Holds off Unko Tintin.
Wonrei's partner, she is from China and her father is a crime boss, leading to her being rather lonely.
- Anime Chinese Girl: She is from China, and so she wears a fighting outfit that resembles a mandarin gown, practices martial arts and has hair up in buns.
- Faux Action Girl: Wonrei normally does the fighting, after all, and the one time she gets to blows with an antagonist she's quickly taken down, despite supposedly being skilled in martial arts herself. To her credit, she does do well against Mooks but most other enemies are just stronger than a human could be.
- Interspecies Romance: With Wonrei, who looks human but is not.
- Mafia Princess: Her father is an unspecified high-roller in the Hong Kong underworld. She's rather unhappy with the ordeal since it means she has little friends and any potential boyfriends would not want to be with her out of fear of her dad.
- Odango Hair: She wears her hair in puns as part of being an Anime Chinese Girl.
- Star-Crossed Lovers: As she points out, even if Wonrei wins, they'll be separated. She is able to accept this because he'll always be in her heart.
A cowardly and perverted demon who avoids conflict any way he can. His powers involve dodging and disabling opponents, or Trickery as he calls them. He's the Mamodo partner of Elle Chivas.
- Badass Pacifist: None of his spells are offensive directly whatsoever and kinda gimicky. However, he is able to launch a red beam that slows down opponents and shoot waves from his ears to deflect attacks. This combined with his Mamodo sensing skills means that he was able to utterly beatdown The Dragon of the Faudo Arc.
- Beware the Silly Ones: In the Faudo Arc's final battle, he beats Rodeaux, Zeon's incredibly deadly Dragon, to a pulp through despite having zero offensive skills. By combining his Mamodo-sensing skills along with his spells that allow him to move quickly, slow down foes and even deflect attacks, he's able to run the much stronger mamodo ragged. He's in control the entire fight, and only loses because Rodeaux takes a cheap shot at Elle.
- Character Development: Become less perverted and more courageous as the story marches on.
- Cowardly Lion: He spends the whole Faudo Arc shivering and hiding. But when the chips are down, he takes on the Arc's Co-Dragons effortlessly.
- Heart Is an Awesome Power: Lacks any truly combat-based spells? Check. Having nothing more but weird spells for moving fast or messing with attacks? Check. Using this and Mamodo sensing skills to utterly manhandle much stronger mamodo throughout the entire fight? Check.
- Hyper-Awareness: His demon sensing skills are so sharp he can dodge attacks without looking at them, often with miniscule margin of error.
- Mundane Utility: The first time Elle has to read the book, he uses each spell to get a look at Tia's panties.
- Panty Thief: Although he's not above bras and swimsuits either.
- Pinocchio Nose: His lips get longer whenever he lies.
- Sensor Character: He is able to sense other demons which helped him avoid other demons before meeting Gash and Kiyomaru. It's because of Momon that Gash and Kiyomaru's group were able to find Faudo before his resurrection.
Momon's partner, a nun who travels the world to stop Mamodo from fighting.
- Armor-Piercing Slap: Delivers one to Momon when she finally gets tired of his cowardly ways.
- Catchphrase: Constantly says "Oyoyoyoyoyo" whenever she's nervous. Also, how many times have you heard her say "Momon that's bad!"?
- Hidden Depths: She's VERY good at singing, especially Beethoven's Ode to Joy in fluent German.
- Nun Too Holy: Played a bit, if her budding romance with Kafka is any indication.
- Parental Substitute: Tries to be one for Momon anyway, yet despite his perverted nature and never listening to her, Elle still cares for him and tries her best to protect him when his antics get him into trouble. She is a nun after all.
- Ship Tease: With Kafka Sunbeam. She does end up living with him in Africa after all.
- Technical Pacifist: She abhors violence, as expected of a nun. Yet she is still a reliable compatriot in the Mamodo fight. Appropriately, her partner never learns a single offensive spell, yet does quite well without them and she is proud that he never had to attack anyone and of his commitment to better himself.
A naive young demon with machines and lasers for his powers. He looks like a small robot or puppet.
- Berserk Button: Hurting the Professor makes him explode with rage.
- Easily Impressed: He's constantly amazed by Dr. Riddles tall tales, no matter how unrealistic they are.
- Frickin' Laser Beams: One of his primary means of attack.
- Mini Mook: His Koburuku spell summons a bunch of mini Kidos... from his mouth.
- More Dakka: The other primary means of attack.
- Super Gullible: No matter how many times he falls for it, he still gets blown away by his book owner's obviously exaggerated stories only to get devastated when the Dr. Riddles reveals he was just kidding.
- Took a Level in Badass: Kido really kicks his combat prowess up a notch when the Professor is badly injured by Belgim E.O.
- Wave Motion Gun: His Zegaruga and Gigano Zegar spells, being giant laser cannons.
Kido's partner, an older man who likes to lead Kido on and then exclaim "kidding!" He serves as the overarching leader for the group in the Zofis arc.
- Big Good: He's the one who gathers the book users and demons to fight Zofis and the one that calls the shots.
- Catchphrase: "Kidding!" or in Japanese, "It's a lie!"
- Cool Old Guy: That he can keep up with all of the craziness going on around him is astonishing. His age does catch up with him every once and a while, though.
- The Gadfly: Many times, when Kido explains something Dr. Riddles had explained earlier, Dr. Riddles will just exclaim his Catchphrase.
- Heroic BSoD: When Kido finds him, the doctor is sitting in a mansion, surrounded by shelves of books and doing nothing with his knowledge. Then we find out why: he failed to save his grandson during his surgery.
- Insufferable Genius: "I'm Professor Riddles, the one who knows ALL!" Even Teen Genius Kiyo is annoyed. Especially Teen Genius Kiyo.
- Jerk with a Heart of Gold: He's an incorrigible troll, and delights in insulting Kiyo even as he's gathering heroic demons to face the Big Bad. Kiyo is left wanting to both strangle him and thank him.
- Maybe Magic, Maybe Mundane: It's implied here and there that he may have the Answer Talker ability, especially since a couple of close ups show he has the telltale eye circles, but nothing has been confirmed. Would explain how he knows alot though.
- My Greatest Failure: The reason he was sitting around doing nothing? He used to be a surgeon. Then he failed to save a child, and the guilt drove him into seclusion. In the original, the child's also his grandson.
- Team Dad: For the team, he somewhat suberts this.
- Troll: He's always winding Kiyo up.
Vincent Bari & Gustav
A Russian man and his brutal, masculine demon. Bari's spell powers are spiral based.
- Armor-Piercing Question: Gustav, to Bari: "What kind of king do you want to be?"
- Badass Mustache: Gustav.
- Barehanded Spell Block: Very casually to his own spell after it hit Rashirudo. And after being hit by it a few times, he simply punches Zakeruga out.
- Blood Knight: A mild deconstruction. Prior to his fight with Gash, fighting was the one thing Bari liked but without a propose beyond that he was growing more and more dissatisfied with his life. He began to gain purpose after fighting Zatch.
- Cool Old Guy: Gustav is this, trying to temper his partner into a better path.
- Covered in Scars: After his battle with Elzador, Bari is littered with scars all over. He even lost one of his horns.
- Death Glare: His 'strong eyes' that drive Keith up the wall
- Defeating the Undefeatable: Keith considers his fight with Elzador to be this. Bari chides Keith for not having the guts to think it was possible.
- Desperately Looking for a Purpose in Life: When he first meets Zatch, he's extremely frustrated because none of his fights satisfy him and he has no idea what he wants to do once he's won. Fighting Zatch actually gives him the drive he needs to find meaning in his life, and he decides not to burn Zatch's book out of gratitude.
- Deus Exit Machina: Bari is by far one of the most powerful characters in the series; among other things, he deals Zatch his first unambiguous defeat, defeats a dragon Mamodo who is explicitly stated to be one of the favorites to win the entire competition, beats Keith senseless despite the latter undergoing three One-Winged Angel transformations, and is, in fact, the single character in the entire series to never lose a fight. It's even insinuated very strongly that he is capable of defeating Zeno, Rodeaux, and Jedun singlehandedly, so of course, right before the heroes confront the trio, Bari acts selflessly for the first time in the series by sacrificing himself to get the party through one of Faudo's deathtraps, completing his Character Development and paving the way for Zatch to take on Zeno himself.
- Determinator: Proves himself to be one when facing an enemy far stronger than even himself.
- Everything Is Better With Spinning: His spells are all have a twister theme.
- Face of a Thug: Even his neutral expression is intimidating. Hell, even his smiles are usually terrifying.
- Flight: When firing his spells from behind.
- Get a Hold of Yourself, Man!: To Gash.
- The Gift: As noted above, Bari is of no spectacular origin, nor did he receive any training from anyone prior to the start of the battle for king. He is a naturally powerful demon.
- Heroic Sacrifice: Takes Zatch's place in a death-trap because he respects the little guy too much to let him take the fall.
- Knight of Cerebus: The first and one of the few mamodos to outright defeat Kiyo and Zatch, even taking their strongest spell while only suffering cosmetic damage. The only reason he doesn't burn their book is because their fight showed Bari a purpose for his life beyond mindless battles and he decides to have a rematch with them later. Likewise, their first real defeat subsequently leaves both Kiyo and Zatch in a slump for some time after.
- Manly Tears: During his Heroic Sacrifice
- Slasher Smile: Pretty much the only kind he is capable of.
- When He Smiles: Although he gains a more tender, genuine smile as his restless anger subsides.
- Smoking Is Cool: Gustav.
- Stealth Mentor: Gustav pretty much manipulated the entirety of the fight between Bari and Gash to teach Bari that he needs to be motivated.
- Super Reflexes: Dodged Zakeruga from point blank range.
- Super Strength: To such a degree that one strike from his hand does more damage than an spell from one of the stronger enemies in the Fudou arc.
- Tears of Fear: When facing Elzador's overwhelming strength. But Bari overcame his fear to emerge victorious .
- The Unfought: He never got his rematch with Gash, instead pulling a Heroic Sacrifice to save Gash and others trying to stop Fudou.
- This Is a Drill: Generally, his spells revolve around twisters, but a couple of his spells concentrate them into drills on his arms.
- Took a Level in Badass: Yes, even further.
- Took a Level in Kindness: After his Character Development, Bari became much more kind to others.
- Training from Hell: What do you do when you want to get stronger? Well, if you're Bari you go challenge a freaking dragon, that's what you do. He fought Ashuron's younger brother one-on-one and won.
- The Worf Barrage: The first mamodo shrug off a direct hit from Baou Zakeruga. It provokes an understandable Oh, Crap! moment from Kiyo since, up until now Baou Zakeruga has proven able to one-shot any mamodo they've come across and also drained Kiyo of all his heart energy, leaving them unable to cast anymore spells.
- Worthy Opponent: To Gash and Kiyomaru.
- You Could Have Used Your Powers for Good: Delivered to Bari by Gustav at the end of his battle with Zatch, pointing out that for all of Bari's natural power, all he does with it is going around picking fights with any mamodos that he comes across rather than seeking a higher goal. It ultimately convinces Bari to spare Zatch and decide on a new goal of becoming the strongest king that has ever lived. He ultimately doesn't become king but Gustav at the end notes that Bari had become a strong mamodo capable of striking even a king.
Kolulu & Lori/Shiori
The one who inspired Zatch to pursue being a kind king, she is forced to fight against her will and has a very close and sisterly relationship with her book-keeper. Her spell power was thought to be spikes, but later revealed to actually be protection. transforming her into a horrifying Blood Knight every time a spell is cast on her. Her partner, Lori, is a kindhearted schoolgirl who met Kolulu in the streets by chance. Lori had an estranged relationship with her workaholic parents, but Kolulu's passing inspired her to get closer to them.
- Bad Powers, Good People: Played mostly straight. Her powers are mainly on powerful offensive capabilities. The end implies she has moves that allow her to protect people; her strongest spell allows people to survive in space.
- The Berserker: The effect of her master Shiori's spells.
- The Gwen Stacy: To Zatch. Her situation is almost Zatch's entire motivation for wanting to be King.
- Parental Neglect: The source of Lori's grief. Her parents are so busy with their work that they barely communicate with her save for mere notes written on a whiteboard. For that reason, Lori gives her best to take care of Kolulu. After Kolulu's book is burned, however, her situation with her parents seemed to have improved as of her reappearance in episode 24.
- She's Got Legs: During the last part of episode 8, Lori wears a pair of blue shorts that accentuate her prominent thighs when kneeling down.
- Superpowered Evil Side: Kolulu was saddled with one to make sure that she was willing to fight. It's as messed up as you think it is and then some.
- We Hardly Knew Ye: Lasts a single episode/chapter.
A punk-like teenage demon with the power of Healing like Tia. However, he can only heal himself and otherwise relies on his brute force.
- Bare-Fisted Monk: Fights with his fists, literally.
- Berserk Button: His human partner calls him Danny Boy, which drives him up the wall.
- Healing Factor: It's his one ability and is easily the most powerful healing spell in the series.
- Good Thing You Can Heal: Danny makes virtually no effort to defend himself against automatic fire, knowing full well that his spell will do away with the damage immediately.
- Stone Wall: His only spell in the series is a healing one, which means he is forced to fight entirely hand-to-hand. On the other hand, said spell heals him completely in a single iteration, and thus makes him virtually impossible to bring down by conventional means.
A large, animal-like mamomdo who is a friend of Zatch's from the mamodo world. Despite his scary exterior, he's a nice guy concerned with helping his partner Kyle overcome his timidity.
- Badass Normal: Effectively, since Kyle was to scared to cast spells Rein had to beat any challengers barehanded.
- Gentle Giant: He looks pretty terrifying, but he's just as kind and gentle as Zatch.
- HeelFace Turn: In his backstory. He was originally a violent, rampaging demon who was feared and hated. Once, he severely injured himself, and despite his threats, Zatch brought him back from the brink of death. Afterward, Rein reformed.
- Made of Iron: Having to fight without spells, Rein has no real defense against other demon's spells besides enduring them.
- Shapeshifting: Can also take human appearance.
A young, tough-acting demon with a good heart. He's not interested in fighting so much as finding a certain someone... He uses spells that cause him to "Gear Up", boosting his physical abilities by several magnitudes per gear. He's partned with Jed, an older biker-looking drifter.
- Big Sister Worship: Towards Cherish.
- Bystander Syndrome: Ted refuses to help out against Zofis's army, saying it's not his problem.
- Chekhov's Gunman: He first appears as a silhouette during an extra chapter depicting Professor Riddles's attempt to get help against Zofis's army.
- Good Old Fisticuffs: His weapon of choice. Unlike many other demons, Ted has no true attack spells. Instead, he gets his gears.
- No Sympathy: Jed informs Ted that if he can't find food or a place to stay, he's on his own. Then again, Ted makes an offhand mention of a tab he has running from Jed, suggesting Jed doesn't just let him go hungry either.
- Reality Ensues: The standard procedure when he and Jed arrive in a town is they split up to find food and lodgings with each paying their own way, working if they can't afford it. Ted is a small child and so can't find people willing to give him a job.
- Super Mode: Ted's gears. They can only be used in sequence, one at a time, and each raises his speed and strength to formidable heights.
- Taking the Bullet: In a roundabout way. He pointedly refuses to counter Gyaron's final spell (and so takes it head on) so he could save his own final spell to shatter the crystallized lightning used to torture Cherish.
- Walking the Earth: Jed because he's a wanderer, Ted because he's looking for Cherish.
Earth & Elly
- Antagonist Abilities: He has the ability to drain people's energy through his sword and somehow this skill seems less effective when he's fighting alongside the heroes than it was being used against them.
- Better to Die than Be Killed: Elly would rather die from Riou's curse than allow Faudo to be awakened, since Faudo will destroy the world and kill her anyway.
- BFS: His spells all make use of his sword. Some get quite large.
- Despair Event Horizon: Almost. Upon realizing that Clear may well be the one who will return home to the Mamodo World, Earth bursts into tears and begins screaming about how he doesn't want to die.
- Iaijutsu Practitioner: The Jerudo Ma Sorudo spell is a powerful Iai attack that can be held back and released instantly when the enemy gets within range.
- Knight in Shining Armor: His appearance is a spot on match and Earth comes from a clan that upholds the demon world's laws. While in the human world, he makes a point of investigating what he believes to be threats to either world, such as Baou and Faudo.
- Knight Templar: Eventually mellowing.
- Littlest Cancer Patient: Elly is a sickly girl who still tries to fight.
- Spotting the Thread: Earth claims to be going for a walk, but Elly notices he's bringing the book with him and concludes an enemy is nearby.
- Storm of Blades: In the manga, the Varusere Ozu Māru Sorudon spell.
- Worf Effect: gets beaten by Goomu to showcase how dangerous he is and by extension how dangerous the much stronger Clear is.
- Worf Had the Flu: Elly was having a particularly bad attack of her disease at the time and they were out of medicine.
Riya & Aleshie
A cute, plush looking demon with a messianic partner from South Asia. Riya uses Transformation to grow body parts to attack.
- Badass Normal: Aleshie can fight a demon in hand to hand combat with reasonable success.
- Death Seeker: Aleshie, though only briefly, so that his power could not be used to unseal Faudo.
- Determinator: Aleshie can keep fighting through a curse that ought to be keeping him at death's door. He says he's had worse.
- Ridiculously Cute Critter: Riya's tellytubby-esque appearance qualifies.
Karudio & Sauza
A small girl and a horse-demon similar to Ponygon. Initially presented as opponents to Ponygon, they later join the heroes to fight the Faudo cultists. Karudio is a Palette Swap of Ponygon, being able to use Armor and Ice abilities.
- An Ice Person: Karudio has ice powers, in contrast to Ponygon's fire.
- Big Brother Instinct: Sauza sees his little sister in Elly, they are unable to team up properly until he stops trying to protect her.
- Harmless Freezing: Surprisingly, a subversion. Karudio's final spell produces such sheer cold that it's even dangerous for himself.
- Heroic Sacrifice: Uses a spell that will freeze even himself to death to stop Faudo's heart demon. Sauza burns the book before he can expire.
- Teeth-Clenched Teamwork: With Earth and Elly, at first.
Ashuron & Riin ViseAshuron first makes his appearance as one of the final ten demons in the fight, an incredibly powerful dragon. After testing Zatch in battle, he reveals that he is seeking to defeat Clear Note, an evil demon with considerable strength of his own. He's also the older brother of the dragon Mamodo Bari defeated. His spells focus on increasing the size of his already impressive capabilities.
- Giant Flyer: Of the dragon variety.
- Impaled with Extreme Prejudice: Almost stabs Clear Note in two using his horn and his ultimate spell.
- Madeof Iron: His legendary red dragon scales are virtually indestructible and one of the few things capable of tanking Clear Note's attacks, though Clear's stronger spells are capable of piercing them.
- Playing with Fire: The fire breath you'd expect from a giant dragon.
- Our Dragons Are Different: Specifically, huge (even when children), intelligent, can become human, and love sake.
- Shapeshifting: Like Rein before him, he can take human form, though it's still pretty freaky.
- Super Speed: His ultimate spell, Shin Feiuruku, enables supersonic flight speed in a straight line.
- Too Fast to Stop: When using his ultimate spell, he has a bit of difficulty when it comes to maneuvering.
- We Hardly Knew Ye: Built up as the Big Good of the final arc. Sent back about a quarter of the way into it.
Cherish & Nicole
The demon girl who Ted is looking for, and the one who inspired him to defend people who are too weak to defend themselves. Her powers revolve around sniping using Crystals.
- Broken Pedestal: Albeit subverted.
- Cool Big Sis: How Ted and the other kids from the demon world regard her.
- Fear of Thunder: Really bad case of it, from Zeon torturing her with his lightning.
- Gemstone Assault: The Kofaru spell family.
- Little Miss Badass: She's tough enough to rank pretty high in the Faudo cult's hierarchy. She even gives Zeno pause for a while.
- Magic Mirror: Two of these were apparently summoned by the Gurādo Ma Kofaru spell in the manga. Cherish uses them for exit portals for the projectiles of the aforementioned spell. Basically allows her to fire from three different locations without moving.
- Samus Is a Girl: Ted actually believed that Nicole was a boy when he met her the first time, due to the clothes she was using.
- Small Girl, Big Gun: The Gurādo Ma Kofaru spell in the manga. It fires diamond bullets.
Suzume Mizuno/Suzy Mizuno
Kiyomaro's friend from school, she's ditzy and cheerful and has a huge crush on him. One of the first friend Kiyomaro has.
- Adorkable: She's an awkward airhead, but that's all just part of her charm.
- Betty and Veronica: Betty to Megumi's Veronica.
- Brainless Beauty: Downplayed; she's cute, but in-universe she's considered rather plain.
- Butt-Monkey: When bad things aren't happening to Kiyo, it's because they're happening to her instead.
- Cloud Cuckoo Lander: Hooooh boy.
- Cute Clumsy Girl: Adorable, but can't go two steps without tripping over her own feet.
- Damsel in Distress: At the beginning of the series as part of Zatch's plan to make Kiyo a hero.
- The Ditz: The planet she's on hasn't been discovered yet.
- Genki Girl: Always full of energy and exciteable.
- Girl Next Door: Serves as this for Kiyo compared to someone like Megumi.
- Nice Girl: She's a very sweet and positive girl.
- No Sense of Direction: Doesn't help that she's a scatterbrain.
- Ordinary High-School Student: As ordinary as she gets, anyway.
- Plucky Comic Relief: She does try her best. But the world has it out for her.
- Plucky Girl: She's as feisty and tenacious as she is ditzy.
- Static Character: She gets zero character development, never wavering from her role as comic relief.
- Unknown Rival: To Shion Hibiki and Megumi.
- Yandere: Played for Laughs. And to be fair, she's still not all that bad (ex: she was jealous of Filler Arc girl Shion and considered her a rival for Kiyo...but at the end, when it's announced that Shion has transferred out of the school, she's actually genuinely sad about Shion's departure.)
A cruel and manipulative Mamodo who utilizes mind-altering and psychokinetic abilities to control his opponents. He is the main antagonist of the first arc, and seeks to awaken the Stone Tablet mamodo to conquer the tournament in his stead.
- Arc Villain: Of the Ancient Mamodo arc.
- Arch-Enemy: To Sherry and Brago. Sherry absolutely despises Zofis for manipulating Koko and refuses to allow anyone else to take him out. And, despite his attempt to kill Sherry when they first met, Zofis actively avoids a confrontation with them, because Brago absolutely terrifies him.
- Bad Boss: All of his minions, and even Koko, are just tools for him to become king.
- Big Eater: Like all Mamodo, but in Zofis' case, he prefers huge feasts fit for a king, which mirrors his personality and ambitions. Also, unlike other Mamodo such as Zatch or Brago, Zofis doesn't scarf down his meals like an animal. Quite the opposite, as shown in ep.69.
- Dude Looks Like a Lady: His face, his colored fingernails, his outfit, and even his voice (to an extent) make his gender somewhat ambiguous to viewers. But all the characters can tell he's male.
- Combat Pragmatist: At one point he announces his arrival by blasting another demon's book before they even knew he was there.
- Dirty Coward: Hides behind his army of Thousand-Year-Old mamodo. When Brago finally confronts him, he spends most of the battle running away, and when he's finally taken down, he's a teary mess.
- Evil Sorcerer: Unlike most Mamodo, Zofis has powers that go far beyond his book spells.
- Expy: His look, voice, personality, and even his attacks are very reminiscent of Freeza.
- Failed a Spot Check: Subverted. Zofis, despite his strong perceptive abilities, somehow completely missed that Brago had intercepted the spell Zofis had shot at Sherry when they first met. Brago flat-out refuses to believe this and comes to the conclusion the Zofis had indeed noticed him and fled out of fear. Zofis' Tears of Fear are all the confirmation he needs.
- Faux Affably Evil: And he can just barely manage that.
- Inferiority Superiority Complex: There are hints that he felt inferior back in the mamodo world, but as the Big Bad, he styles himself like the king he intends to be.
- Knight of Cerebus: The series takes a notably darker turn during his arc, and he's one of the first villains to have absolutely nothing funny about him.
- Manipulative Bastard: Literally; he has the power to manipulate the hearts and mind of humans and Mamodos alike. Even when he has to use mundane methods like against Sherry, he displays a through understanding of how to mentally break people.
- Smug Snake: He actually is incredibly powerful and can do things such as fly, teleport, and mentally dominate others without the use of his book. But when faced with someone he knows is his equal or superior he isn't as smug.
- Stuff Blowing Up: His powers are centered around explosions.
- Tyrant Takes the Helm: His ultimate goal is to become king of the Mamodo world and rule with an iron fist. He fails
- Villainous Breakdown: He starts losing his composure when Brago and Sherry enter the conflict. Them singlehandedly defeating his army, Brago's spell actually hitting him, and Sherry becoming immune to his manipulations all push him farther into breaking down. By the time Brago threatens to hunt him down in the demon world, he's reduced to a sobbing wreck.
Sherry's oldest and most trusted friend. She was originally a kind and caring soul, but has seemingly turned evil upon gaining power from Zofis. It's revealed later revealed she's being manipulated by Zofis, who has taken over her body as a puppet and is pretending that she's still sentient.
- Affably Evil: Rarely loses her cute, smiling demeanor even when she's being evil.
- Break the Cutie: Her backstory. Zofis is able to use this to his advantage. . .
- Broken Pedestal: It seems this way at first, when Koko, under Zofis' control, tries to break Sherry's spirit by revealing that she actually hates Sherry and is a truly evil person all on her own. Subverted in that, in the end, this really is all a trick of Zofis', and Koko really is the good friend Sherry remembered her being.
- Childhood Friends: With Sherry.
- Cuddle Bug: A villanous example: Koko sure likes to hug Zofis from behind. But the fact that she's brainwashed the whole time, however, makes it all look very creepy and squicky.
- Laser-Guided Amnesia: Zofis removes all memories of her actions while evil. He refuses to do so until Brago tells him that if he doesn't, he will personally make Zofis' life in the demon world a living hell.
- Mind-Control Eyes: Under Zofis' influence, her eyes are blank and inexpressive, a sign that she really is brainwashed and not simply acting on her repressed desires like Zofis claims.
- More Than Mind Control: Zofis attempts to convince Sherry it's this. It almost works. Zofis also attempts to invoke this: unlike other people whose minds Zofis simply controlled, Zofis created an entirely different personality out of the dark feelings in Koko's heart so that she would be his bookkeeper. Zofis restores her heart to normal after he gets beaten.
- Put on a Bus: Despite her being Sherry's initial reason for fighting, she totally disappears after Zofis is sent back. Justified, in that she goes off to college and Sherry wouldn't want to remind her of the battle anyway.
A four-legged beastlike demon who seeks to resurrect the giant demon Faudo for his own goals. He uses Curse magic to get what he wants, despite being a capable fighter.
- Animal Motif: Lions. His spells also have a beast theme.
- Arc Villain: Of the Faudo Arc.
- Arch-Enemy: Comes to view Kiyo as his main enemy out of everyone opposing him.
- Cast from Hit Points: His curse hurts him just as much as it hurts the victims.
- Clown Car: You know that mouth on his chest? His partner's in there.
- Dangerous Forbidden Technique: His final spell turns him into a giant berserk beast. He's still no match for Zeno.
- Even Evil Has Standards: Having been beaten by Zeno, Leo gloats to him that his goal to take over Faodo is a futile one, as he's armed a failsafe device that will send Faudo back to the Mamodo World. Zeno simply smirks and says he'll just wreck the device then, visibly horrifying Leo - he'd intended to use Faudo to win the tournament, not destroy the world, which leaving him in the human realm would inevitably do. Not that he's in any position to argue, as Zeno immediately sends him back.
- Funny Afro: Has one that resembles a lion's mane. Zeon grabs onto it to be taken into the control room with Riou.
- Hero Killer: Kills Kiyo, temporarily.
- Hijacked by Ganon Mid-way through the Faudo Arc, Zeno takes over and sends Riou back to the mamodo world
- Unstoppable Rage: Aforementioned final spell.
- Weapon of Choice: His staff.
- "Well Done, Son!" Guy: We find out in flashback that everything he did was due to the pressure of representing his family in the tournament, and he was seriously conflicted about some of the things he did.
- Worf Effect: Defeats Zatch and Kiyo, then is beaten by Zeno to show how dangerous the latter is.
A demon with strong electrical powers who looks uncannily like Zatch. He's tied to the loss of Zatch's memories. He also uses lightning, but is colored white instead of Zatch's yellow.
- Adaptational Villainy: In the manga, Zeon does start out rather dickish but as the battle goes on we start to see he does have a noble side and that his actions were purely driven by jealously which he eventually overcomes once he sees Zatch's past. In the anime, no such development exists, he's evil through and through and has nothing but contempt for Zatch to the bitter end, even when he's beaten. This was because the author had broken his hand as he was in the midst of the story arc and the anime rapidly caught up before he could do the battle between Zatch and Zeno. So the animation staff just had to go with anything and just ran with what they had.
- Arch-Enemy: To Zatch
- Big Bad: For the last half of the Faudo arc, and for most of the series seeing as he's the one who removed Zatch's memories.
- Blood Knight: Zeno is very ruthless and it was something he inherited from his father. This reason is exactly why King Bell gave Bao to Zatch. Bao consumed so much darkness, the spell became dangerous and Zeno, possessing his father's wrath, would've been consumed by it. Contrast this to Zatch, who not only manage to resist it, but purify Bao.
- Cain and Abel: The Cain to Zatch's Abel, though they get better.
- Charles Atlas Superpower: His spell selection is similar to Gash's, meaning his feats of extreme strength and speed come from pure physical training.
- Evil Albino
- Evil Twin: Of Zatch, natch. Literally.
- Exotic Eye Designs
- Flash Step: Spams this, often to get behind opponents.
- Freudian Excuse: His grudge against Zatch? He believed that, since Zatch got the incredible power of Bao, and he himself had to go through Training from Hell, that his parents favored Zatch. His Heel Realization hits when he realizes Zatch's bad past yet never waivered from his kind self while also learnign Zatch was given Bao to protect Zeno from it.
- Hard Work Hardly Works: Part of what drives him. He feels driven to surpass Zatch's Bao Zakeruga with his own power, born from his Training from Hell. If he can do so, he'll prove to himself that the suffering of said training was actually worth something. He actually is stronger than Zatch during their fight, but he loses because Zatch matches his and Dufort's suffering and the power coming from it with the care from his friends, empowering Bao.
- The Heavy: His actions kickstart the plot, and he's the driving force behind the second major arc of the series.
- HeelFace Turn: His last act in the human world.
- Ignored Epiphany: He sees fragments of Zatch's memories, revealing bits of Zatch's past along with the horrific might of Bao. He seemingly shrugs it off though he eventually realizes he was in the wrong. Furthermore, he confessed that if he did win, he would've destroyed Zatch's book to prevent Bao from consuming him.
- Kick the Dog: Beating Rops was all part of the competition, but he rubs it in by having Dufort Zeker the already burning book, destroying it instantly so Rops doesn't have the chance to give his bookkeeper a farewell.
- My God, What Have I Done?: Starts undergoing one when he catches a glimpse of Zatch's memories and seeing the corrupted form of Bao. Finally hits it when defeated and sees Zatch's unpleasant past. Sums it up as such: "Forgive me, Zatch. Your brother has been a fool."
- Out of Focus: He's introduced in one scene and then later we find out he burned Rops' book...and then we don't hear from him again 'til the second arc.
- Pet the Dog: Seeing Rodeaux being willing to risk his life to attack him, Zeon tanks the hit rather than dodge it.
- The Power of Hate: His suffering along with the hate from Dufort resulted in his ultimate spell. He and Dufort were released from it when Bao ate the spell.
- Shock and Awe: Just like Zatch, although he's far more competent with it.
- Slasher Smile: Very fond of these.
- Smug Super: Fond of using only the bare minimum of force to counter his enemies' spells. This still comes off as him showing off though, since he's beating them with spells that ought to be much weaker than theirs.
- Tyke Bomb: Trained from when he was three to be a candidate for king.
- White Hair, Black Heart
- You Cannot Grasp the True Form: Of Baou Zakeruga. Not until he sees Gash and Kiyomaro nearly devoured by its power, he doesn't.
Zeon's partner, a mysterious, quiet young man of initially unclear origin.
- Ask a Stupid Question...: Given his Answer Talker power, asking him how he knows something causes him to respond with derision.
- Awesomeness by Analysis: His Answer Talker ability.
- Blue and Orange Morality: He considers the lives of human beings to have no more importance than the lives of flies. Since no one cares if a fly dies, he figures it doesn't matter if people die. He admits that most people would probably disagree with his assessment.
- Came Back Strong: Implied. He indicates the Answer Talker comes from dying then coming back to life.
- Evil Albino: Much like his partner, although not quite as pale.
- Freudian Excuse: Dufort was raised in a lab environment from childhood, treated cruelly and anyone kind to him was removed. After years of torment and testing, he was given one final battery of tests that opened the path to his release, all while taunted by the scientist who had ruled his life. Turns out that A)His Answer Talker was being used for military application, B) He was being released into the Arctic to die rather than being freed, and, oh, C) His mother sold him for ten thousand dollars. Teaming up with Zeon doesn't seem so far-fetched, considering...
- Nerves of Steel: He jumps off a pillar at least three stories tall without flinching, confident Zeon will catch him.
- Not Good with People: He's very bad at even carrying on a conversation. Justified, seeing as the only human interaction he's had was through a computer screen.
- Not So Different: To Kiyo Takemine; drives the point home in the Anime when he mind scans the former commenting about his years of jealousy-fueled neglect received both from his peers and his teachers in life, comparing it to his own harsh lab rat days in the asylum he'd been incarcerated in.
- Psychic Powers: In the Anime; Dufort had vast psychic powers for which he was poked and prodded within an undisclosed facility most of his life for.
- The Mentor: During the Clear Note arc, he helps the remaining Main Characters bring out their greatest potential via his use of the Answer Talker.
- The Power of Hate: His Answer Talker ability was honed through pure hatred. It's implied his immense amount of heart power comes from this hatred as well.
- Skewed Priorities. He cure a child's fatal disease because the boy's family's wailing was keeping him from getting any sleep.
- The Stoic: He's rarely seen with so much as a twitch.
- Not So Stoic: Was angered so much when Apollo asked how much hatred he was hiding to the point where he attempted to finish him and Rops off with a 'Giga' level spell, until Zeon convinced him otherwise. He is also moved to tears when he sees Zatch taking in his suffering to free him from it.
- Straw Nihilist: Given his past, it's no surprise. Character Development frees him from this.
- Walking the Earth: After Zeno's gone, he decides to wander.
The final villain of the series, an incredibly powerful demon who lives for destruction. Despite his frail appearance, Clear is possibly the strongest demon in the entire series: he boasts the ability of Obliteration, which allows him to completely nullify all spells and creates pockets of Negative Space Wedgie where he chooses.
- Anti-Magic: The Supurifo spell family.
- BFG: The Zarefedōra spell creates a gigantic artillery cannon which doubles as a projectile.
- Big Bad: Of the last arc.
- Bishōnen Line: Played straight with first, then averted with his One-Winged Angel form.
- Creepy Child: All Mamodo are children, but Clear Note looks the most human of them all.
- Dem Bones: The Bādorerugo spell conjures a giant, white, winged doll, which looks like a dragon skeleton.
- Evilutionary Biologist: He claims his existance and intentions to be the natural result of evolution.
- Generic Doomsday Villain: He's an extremist nihilist whose goals are the destruction of the human and Mamodo worlds and then suicide. He's also never so much as mentioned prior to his arc.
- Invincible Villain: His first appearance; he hands Brago his first and only non-friendly defeat, destroys the full-power Baou Zakeruga, and nobody but Ashuron is able to lay so much as a finger on him (Brago pitched in at one critical moment, but only because Vino was out of energy). Interestingly enough, the fights with his various powered-up forms are much more even thanks to the heroes also getting much stronger.
- Light Is Not Good: Pure white, and pure evil.
- No-Sell: The Supurifo spell family, as mentioned above. Unlike other defensive spells, they don't stop attacks as much as they directly cancel their effects or make them dissapear.
- Omnicidal Maniac: To its logical extreme.
- One-Winged Angel: Ends up with two such forms, each giving him an ungodly amount of power.
- Person of Mass Destruction: He compares himself to a nuke.
- Physical God: His final form ends up this way.
- Powered by a Forsaken Child: We never find out anything about Vino, the baby who wields Clear Note's spellbook.
- Power of the Void: The Radisu spell family.
- Pure Is Not Good: It's implied that the reason he's so powerful is that his bookkeeper is a baby and can thus supply completely "pure" heart energy.
- Recursive Ammo: Bādorerugo can shoot its hands which seperate into smaller parts. Every tiny part contains the Annihilation effect of the Radisu spell family.
- Sensor Character: His ability to sense other demons is unsurpassed as his range goes up to 5000 km.
- So Last Season: Does this to his predecessors as Big Bad by virtue of his methods: he kills his opponents. As nasty as they were, even Zeno and Zofis were simply content to send them back, but not Clear.
- White Hair, Black Heart
- With Great Power Comes Great Insanity: His current looks, goal and power level comes from him being controlled by his own spell, Shin Clear Seunousu.
- The Worf Effect: Delivers Brago the only one of these he ever gets. Brago, after training, returns the favor to his first One-Winged Angel form.
Hosokawa and Reycom
The manga's very first true villains, and the first pair Zatch and Kiyo defeat. Hosokawa is a thief who has been using Reycom's ice powers to take whatever he wants, and tries to steal Zatch away from Kiyo to increase his own power. Reycom, in turn, lets Hosokawa use him, as he feels it makes him stronger. Notably, they're the only team Zatch and Kiyo beat before they actually learn why they're fighting at all.
- Adaptation Deviation: In the manga, Hosokawa learns about Zatch when he and Kiyo foil some bank robbers. In the anime adaptation, he is the bank robber.
- An Ice Person: Reycom's basic spell, Gikor, shoots massive icicles out of his mouth. His second spell, Freezudo, freezes things in ice.
- Evil Counterpart: To Zach and Kiyo's early relationship with each other. Kiyo tends to think of Zatch as an annoyance, but still tries to look out for him. Hosokawa thinks Reycom's the best thing that ever happened to him, but still treats him like dirt. And while Zatch is working to make Kiyo a better person, Reycom encourages Hosokawa's decent into villainy, in order to make himself more powerful. On a related note, Reycom's book is blue to Zatch's red.
- Locked Out of the Loop: Hosokawa has no idea what mamodo are, or of the contest to become king. He didn't even know there were other kids like Reycom until he reads about Zatch in the newspaper — or when he and Kiyo thwart his bank robbery in the anime — and then tries to take Zatch and his spell book, not knowing only the chosen partner can use it. This despite the fact that he's been working with Reycom for a while now, who ought to know all this. Apparently, Reycom just never bothered to tell him anything.
- Small Role, Big Impact: They only appear for a few chapters in the manga, around two episodes in the anime, and are never seen again after Reycom's book is burned (except for a cameo from Reycom in one of the last chapters). However, their actions establish a great deal of the mamodo fight and how it works. Kiyo and Zatch had no idea there were more kids like Zatch until confronted by Hosokawa and Reycom in the manga, and it's through fighting them that they learn spell books only work for one person, and the mamodo disappears when their book is burned. The fight also marks the first use of the second spell, Rashield, and when Zatch realizes that the magic is coming from him, as before he thought it was Kiyo's tricks and strategies.
- Starter Villain: They only know two spells, freely admit they're only using each other, don't work together at all and are unrelated to any future characters or story arcs. Heck, they're the only team that attacks Zatch for reasons other than to burn his book and become king. But they are the first team Zatch and Kiyo defeat on their path to make Zatch king — even if, at this point, they don't know it yet.
- Ungrateful Bastard: Hosokawa was a poor delivery man who hated his job before meeting Reycom, and used the demon to better himself and take revenge on people he didn't like. Despite that, he sees Reycom as nothing but a tool. When Kiyo furiously points out that Hosokawa is wearing a nice suit while Reycom's clothes have been reduced to rags, Hosokawa just laughs.
Hyde/Haido & Eido/Eita Kubozuka
The anime's very first villains. Hyde is an ambitious mamodo with wind powers, while Eido is a slacking loser.
- Blow You Away: Hyde's spells are wind-based. Jikir is a strong gust of wind, and Jikirga is a concentrated wind blast.
- Canon Immigrant: Started off as anime-only filler characters with barely two appearances, but apparently were memorable enough that the author ended up including Hyde as one of the mamodo who helps Zatch in the Final Battle, thereby confirming that he and presumably Eido were part of the battle to become king.
- Cool Board: Eido likes riding his skateboard while using Hyde's wind spells to fly, though Hyde says it just makes him look like a poser.
- Filler Villain: What they started off as, and probably a big reason why they were never seen again shortly after their second appearance. Makoto Raiku would later stealthily include Hyde in the manga, albeit only as a cameo in the last few chapters.
- Friendless Background: Eido.
- Minor Major Character: They are the first villains in the anime and one of the few teams which Zatch and Kiyo could not defeat, and also get an interesting bit of Character Development in their second and last episode, all of which appeared to set them as important Foils to the protagonists in the future. However, after a mere cameo in one of Megumi's concerts, they never appear again in the series.
- What Happened to the Mouse?: They disappear after their second anime only appearance. As they aren't present at the King Festival, it's clear that they were defeated and their book burned at some point, but how or by who remain unknown. Later, Hyde appears at the end of the manga, assisting Zatch with his final attack on Clear Note and later at school in the mamodo world.
Papipurio & Lupa
A loopy duo that are incredibly weak on their own. Lupa is a loony nun-looking woman, while Papipurio is a pampered, Spoiled Brat of a demon who dresses like a prince.
- Affably Evil: Despite how much they antagonized Gash and the others in their past battles and involving themselves in resurrecting Faudo, they were never really evil in the first place, and they eventually lose their selfish attitude after being saved by Kanchome.
- Born Lucky: Manages to get into the last ten demons despite being absurdly weak.
- Gonk: Both of them.
- HeelFace Turn: They were never really evil, but they eventually lose their selfish attitude after being saved by Kanchome.
- No Celebrities Were Harmed: Lupa kind of looks modeled after Whoopi Goldberg from her role in Sister Act.
- Nun Too Holy: Lupa is dressed in a nun outfit but she never acts as such.
- Replacement Goldfish: For Lupa's deceased son.
- So Last Season: Their problem is their spells are always at the level everyone else's were one arc ago.
- Standard Status Effects: Papipurio's spells are full of things like paralysis, itching, and blinding effects.
- Villain: Exit, Stage Left: Defied. They try to do this to set up a hostage exchange with Kyle, but Gash just keeps chasing them until they reach the exchange spot.
Patie/Penny & Ururu/Uri
Gash's self-proclaimed lover who chases after him during the Ancient Demon Arc. She's partnered with Ururu, a poor man. Patie promised to help take care of his hungry family in exchange for helping her find Gash. Patie utilizes the power of Water.
- Berserk Button: Anytime Gash doesn't recall her or rejects her feelings is all she needs to go off the deep end.
- Bitch in Sheep's Clothing: Oh sure, she's extremely cute and sweet at first, but beneath that face, she's extremely selfish, vain, and ultimately just unpleasant. Also, if you make her mad... Thank goodness for her HeelFace Turn.
- Big Eater: All the Demons are this, but Patie loves sweets in particular.
- Distaff Counterpart: To Gash. When she cuts off her hair in the Millennial Demon Arc, she looks almost exactly like him. Many of their spells mirror each other as well, most notably "So Giaku" and "Baou Zakeruga."
- Evil Is Petty: She joins in with Zofis simply because Gash doesn't remember her in the Demon World despite the fact he lost his memory, believing that he forgot about her. Kiyomaro tried to explain this to her, but due to some bad communication from Gash, it just makes Patie think she's being taken advantage of.
- Goofy Print Underwear: It has an image of Gash's face.
- HeelFace Turn: In the Millennial Demon Arc. After Gash demands to know if Patie is aware of how awful she's treated the other Millennial Demons and their brainwashed human partners, along with all the other terrible things she's done, Patie tries to redeem herself by helping defeat Demolt and destroy the Moonlight Stone with Byonko and Alvin. It's also the first time Ururu actively helps her instead of just following orders, as she's doing something noble for once.
- Heroic Sacrifice: Catches Demolt's attention so he would attack her instead of Ururu. Gash and Umagon keep her from dying, although her book is still burned.
- Important Haircut: Cuts it off to use in distracting Demolt, cementing her HeelFace Turn. The grand finale shows she keeps the shorter hairstyle.
- Little Miss Badass: In their first battle, Patie was actually kicking Gash's butt for a good portion of the fight.
- Making a Splash: All her spells revolve around the power of Water, which she can use to absorb Gash's Lightning powers and send it right back at him, proving her powers to easily counter his. Of course, after her HeelFace Turn, she and Gash's powers combine to fight against Demolt in order to help destroy the Moonlight Stone.
- Nightmare Face: A pretty nasty one once something or someone sets her off.
- Our Dragons Are Different: So Giaku, the dragon of water and Shin So Giaku.
- Pet the Dog: Though she was totally selfish and committed illegal acts in order to do so, her helping provide for Ururu's family was pretty nice of her.
- Sweet Tooth: See Big Eater.
- Spoiled Brat: Whenever her parents aren't spoiling her (as showing by having her own private beach with her own fish, which her parents most likely gave her), she ends up spoiling herself. She becomes Spoiled Sweet after her HeelFace Turn, with her parents pulling some strings with the local school so she can be in the same class as Gash in the final chapter.
- Tiny Tyrannical Girl: Though in Ururu's case, he just doesn't really bother to put his foot down with Patie because he knows there's no point.
- Tsundere: Towards Byonko.
- Unstoppable Rage: Gash can tell you, if you set her off, RUN!!!! Not that running does much good anyway.
- Woman Scorned: At least that's how she sees it in regards to Gash.
- Yandere: She comes off as sweet and nice at first, if vain. But once she learns Gash doesn't remember her? Hoo boy. Finally stops being one with her HeelFace Turn, though.
- You Wouldn't Like Me When I'm Angry: Oh no, you wouldn't.
Byonko & Alvin
An annoying, cowardly frog-demon and his partner, an old man with speech problems. He uses Slime powers.
- Adorkable: That clock Byonko wears? Alvin promised to give him a cookie at three o'clock so Byonko made a fake clock set at that time. It was stupid and cute enough to convince Alvin to participate in the battle to become king.
- Big Damn Heroes: Double subverted. He tries to come from out of nowhere to save Patty from Zatch's Baou Zakeruga, but forgot that Alvin wasn't there to actually cast any of his spells and he gets blasted alongside her. Still, there being two targets instead of one diffuse Baou's power enough that they both survive.
- Cool Old Guy: Alvin.
- Crouching Moron, Hidden Badass: Byonko is pretty much a joke. He only ever shows up to get his ass kicked and Alvin can't even pronounce his spells properly. But once he does, the first thing Byonko does is knock Demolt on his ass.
- Obfuscating Stupidity: Alvin pretends to forget his dentures so he won't have to support Zofis.
- The Unintelligible: Alvin, but he was doing it on purpose as he was well aware of Zofis' evil intentions.
Rodeaux & Chita
Rodeaux is a powerful winged demon that allies with Riou to wake up Faudo. His partner is Chita, an emotionless semi-masked woman. Rodeux uses his wings to fire various weapons.
- Anti-Villain: Rodeaux was an antagonist towards Zatch and his group but he formed a bond with his partner that any other heroic demon character had, although subtle.
- Better to Die than Be Killed: Lets his book be burned rather than be torn apart by the Faudo cells inside him.
- Curb-Stomp Battle: When Kiyo woke up, he stood no chance against Zatch's new powers. After a barrage of attacks from Kiyo, he lies on the floor while they turn their attention to Zeon.
- Do Not Go Gentle: As his own body is destroyed from within, Rodeaux continues his attacks on Zeon not letting his increasing wounds slow him down. This situation also serves as a Rousing Speech for his partner Cheeta who became emotionless from losing an eye.
- Emotionless Girl: Chita after losing her eye in an accident she grew to be emotionless and distant from others. Until Rodeaux tells her to stand up for her true feelings before he vanishes.
- Go Out with a Smile: He smiled as he was sent back to the demon world on his terms fighting for what he wanted and not as a pawn.
- Last Villain Stand: He takes a final opportunity to attack Zeon while Dufaux's heart power is being restored, despite his own body being destroyed from within by Faudo's cells.
- Made of Iron: Rodeaux is shown to be very resistant to spells at many points, as he survived when he was attacked by Kiyo's constant Zakeru attacks after he was defeated in Faudo's brain room.
- Pet the Dog: The speech that Rodeaux gives to Chita before his book is burned, telling her to find her own willpower.
- Razor Wings: Rodeaux's spells consist of making his wings into attacks. His most powerful spells create large black blades from his wings to attack.
- The Starscream: His intent to usurp Faudo's power, but naturally nothing comes of it due to Leo and Zeon severely outclassing him.
- Villainous Valour: His last stand against Zeon has his body being ripped apart by Faudo's cells, but he continues his assault fighting for himself.
- Winged Humanoid: Rodeaux.
- You Are Better Than You Think You Are: Rodeaux's last words to Cheeta, despite trying to make it sound like a "The Reason You Suck" Speech. He tells Chita that he's hated her for being so depressed and letting one injury change her life, and leaves her with encouragement."Live strong. Believe in yourself... Your wounds mean nothing... Laugh more, stand up straight... fall in love..."
A masked, bald demon who acts as Leo's right hand man. He uses Shadow abilities.
- Alas, Poor Villain: As his book burns, he laments that he wasn't friends with Leo and that after all their hard work, the grand vision they once had was stolen from them with ease by Zeon. His last act is to apologize to his partner for being a handful.
- Anti-Villain: Despite what he says, he's really only in it to help Leo.
- Death Glare: Gives one to Fango. An omake panel reveals he was absolutely seething despite his apparent composure.
- Doomed Moral Victor: He rejects Faudo's power, seeing accepting it as a betrayal to Leo, and his fight with Aleshie is so close he probably would have won with it.
- Enigmatic Minion: His motives remain a mystery, even to himself.
- Eyes Do Not Belong There: He has eyes on all sides of his head and on his palms. They emit the light he needs for his shadows.
- Human Shield: He uses Fango as a shield to survive Aleshie's ultimate attack.
- I Just Want to Have Friends: Implied. In defeat he laments his loss to him and Fango lacking teamwork and even asks himself why he felt misery at seeing Leo be defeated.
- Living Shadow: His power includes shadow manipulation and creating things made of shadow.
- Teeth-Clenched Teamwork: He and Fango are all but attacking each other despite being on the same side.
- Tragic Villain: After Leo is defeated, all he had left was a pointless grudge against Alishie. Alishie recognized how empty he was and pitied him.
- Unfriendly Fire: Fango clips him with one of his spells, badly burning Zaruchim's arm.
- Worthy Opponent: His treatment of Riya and Aleshie, especially Aleshie, is an odd case. The gist of it is that he considers them to be worthy opponents but can't bring himself to admit it, and therefore wants to crush and humiliate them to prove he's the better fighter.
- Villainous BSoD: Aleshie sent him into one when they first met. After looking into his eyes Zaruchim was left frozen and trembling. Avenging that humiliation is a major motivator for him.
- Villainous Friendship: Leo's defeat pretty much kills his drive. He later laments that he wasn't even friends with Leo, but it's unclear if he's in denial or sad that their businesslike relationship wasn't more personal.
One of the demon kids who team up with Riou to wake up Faudo, Keith's reason for doing so is mainly to take Faudo's power for himself. He holds a personal rivalrly with Bari.
- Cloud Cuckoo Lander: The guy is nuts, changing moods, hobbies, and whims on a moments notice. His huge cigar and big gloves make him look like a Loony Tunes character.
- Jerkass: He outshines even the most overtly evil demons, simply because he's a massive asshole.
- The Rival: Bari.
- Smoking Is Cool: He has a preference for cigars.
- The Starscream: Until he takes on Faudo's powers, despite his claims to the contrary.
- Took a Level in Badass: He gets three powerups from Faudo in his fight with Bari. They doesn't save him.
Goomu & Mir
A silent, imposing beetle monster. His partner, Mir, is a callous, selfish and sadistic woman. Goomu uses the power of the Void, allowing him to teleport across the world in seconds.
- The Aloner: Goomu was alone in the demon world and his partnership with Clear is based on Clear being willing to allow him to live so long as Goomu is the only one left.
- Because You Were Nice to Me: The reason behind his HeelFace Turn.
- Big Creepy-Crawlies: Goomu's appearance is similar to a beetle.
- Dark and Troubled Past: Mir is implied to have been a former moll for the Russian mob.
- Power of the Void: His spell theme. Works slightly different from Clear's and looks drastically different.
- The Unintelligible: Goomu, albeit Mir (and arguably Kanchome) can understand what he is saying.
- You Have Outlived Your Usefulness: As soon as he starts showing misgivings about the Evil Plan, Clear slices him in half, fully intending to kill him. Zatch is able to send him back before he dies.
GorenAlthough not one of the demons Zatch and company fight, Goren is important because his spell is the one that sealed so many demons into stone in the first place. Did not become king, ultimately, as that honor went to Zatch and Zeon's father.
- Taken for Granite: His main power. It's devestatingly effective, to the point where he defeated nearly half of his demon competitors single-handedly.
Laila & Albert
A young female demon who was trapped in stone for 1000 years. She is the only one who disagrees with Zofi's plans, and helps Gash's group upon their arrival in the Devolo Ruins.
- Deadpan Snarker: Once the stone of moonlight is destroyed, Laila and a now liberated Albert start smack-talking Demolt like there's no tomorrow.
- Horned Humanoid: Laila, who has small horns on her head.
- It's Pronounced "Tro-PAY": Albert's name is pronounced in the French manner (Al-BEAR).
- Little Miss Badass: A tiny little girl, and stil one of the most powerful demons we see.
- Lunacy: Laila's spell theme is geared towards crescent moons.
- Pint-Sized Powerhouse: She's able to throw Demolt around.
- The Stoic: Laila's facial expression rarely changes, except to occasionally give a rather charming smile. Albert is like this as well, but that's because he's brainwashed.
- You Gotta Have Blue Hair: Laila has purple hair.
- Wise Beyond Their Years: Despite technically being over 1000 years old, Laila's still just a 7-year-old. Still, she's incredibly intelligent and nearly unflappable.
A melon-obsessed demon whose head looks like the letter V. Appears for only a short time, but remains one of the most popular characters of the series.
- Combat Pragmatist: Jumps the heroes expressly because he knows they are exhausted.
- Groin Attack: Tio pelts his 'little gentleman' with rocks.
- Large Ham: He gives grandiose narration to events even as he accidentally shoots himself with his own spell.
- Trademark Favorite Food: Melons.
- Unskilled, but Strong: He's a complete idiot, but his power is no joke.
- Villain Song: CATCH MY HEART! Very Melon!
- Simple Staff: His spells all revolve around making it longer and stronger.
- Trick Boss: The real threat is his human partner Genzo!
- Ax-Crazy: He's the worst kind of nutcase, the kind with two chair-mounted machine guns and magical powers.
- Beware the Silly Ones: He nearly kills Dr. Riddles and is so strong that Kido is forced to sacrifice himself in order to beat him!
- Psychopathic Manchild: To be fair, when you're stuck in a stone tablet alone for a thousand years, you're probably not going to come out mentally unscathed.
- Younger Than He Looks: In the final chapter he's introduced as a new classmate of Zatch. Yes, despite his appearance, Belgim is actually six years old. It really helps explain his easily-distracted personality and random mood swings.
- Anti-Villain: Unlike the other 4, all he wants is to not be turned to stone again by Zofis.
- Brick Joke: Remember that stone Kiyo found and did all those weird things to...? He remembers it all.
- Fatal Flaw: He considers it to be his compassion, as back during his war he could have beaten Goren if he hadn't been distracted by an obviously faked hostage.
- Hyper-Awareness: Is able to accurately attack his enemies just off the sounds they make while an entire floor below them.
- Star Power: His main ability is manipulating star-shaped drones. They do everything from firing lasers, blocking attacks, and powering Pamoon up.
- Redemption Equals Death: After he loses and decides to fight with Zatch, Zofis appears and burns his book.
- Blood Knight: He laughs after being hit in the face by Ponygon and Zatch.
- The Brute: Plays this role much better due to his lack of intelligence. until his master unintentionally activated the spell to boost his intelligence.
- The Berserker: Described as one.
- Catchphrase: Refers to a lot of things as "depressing."
- Dangerous Forbidden Technique: His final spell. Not for him, for his master since it makes Demolt intelligent enough to stop taking orders.
- Discard and Draw: His final spell greatly boosts his power but he doesn't use any other spells during its duration. Whether this is because he's incapable of doing so or because him eating his master prevented any spell calling is unclear.
- Dumb Muscle: He's supposed to be this. The fact that he's actually fighting strategically is what clues Laila in to the fact that his partner isn't controlled.
- Informed Flaw: Laila says Demolt is supposed to be too stupid to fight well, but he's not that bad. He might have let Zatch's Zakeruzem hit him the first time (and then Zakurga'd his arm with a painful explosion), but after that, he figures out its effects just as quickly as Kiyo and dodges all attempts made on him. Until Laila and Albert restrict his movement, that is.
Zatch's number one nemesis who bullies him throughout the story and is the only one that he can't defeat.
- The Bully: She lives to torment Zatch. And she's pretty good at it too, considering that he could pretty much turn her inside out if he really wanted to.
- Gonk: Could easily be mistaken for a demon herself (and in fact, Bari thinks she's one at first).
- Hidden Heart of Gold: She will taunt Zatch, torture Zatch, and make his life a living hell...but the one and only time he's actually in danger, she helps him without hesitation, with great risk to herself.
- Jerkass: She doesn't really have a reason to bully Zatch as brutally as she does; she just seems to be sadistic. Although...
- Loving Bully: It's heavily implied that Naomi constantly bullies Zatch as a way to show that she really likes him. This is confirmed in the final omake.
The math teacher's wife.
- Gag Boobs: The reason for her existence is for us all to have a laugh at her weirdly-shaped body and comically oversized breasts.
- Gonk: Her face and limbs makes her look nothing like any normal human in the show.