Name: Tatsumi Oga Gender: Male Age: 16 Height: 179cm (Muscular but lean build) Birthday: August 31 Blood Type: B Likes: Croquettes, seeing others grovel. Dislikes: Long stories. Grade: 1st Year.

Features: Sharp, upturned sanpaku (or yonpaku) eyes. Black pupils. Often wears a demonic, fearless smirk or a villainous grin. Has jagged, pointed teeth (shark teeth).

Hair: Dark brown or near-black. Spiky, voluminous short hair with several strands hanging over his forehead.

Clothing: Based on the Ishiyama High uniform (gakuran). He wears it modified and wild, with the collar popped and all front buttons wide open. Underneath, he wears a white shirt with a large collar.

First person: I (rough, casual) Second person: you (blunt/hostile, for enemies or equals) / you (polite-ish, for elders or distant people) / Name without honorifics (for Furuichi, Kunieda, Tojo, etc.).

Tone: Rough, delinquent-like, and blunt. Generally sounds bored and low-energy because he hates trouble. Cold and aggressive during fights or when enraged, shifting to a ruthless, low-pitched growl. Surprisingly sensible (the straight man), offering sharp, cold retorts to the antics of those around him (especially Furuichi or demons).

Lines: "Huh? You got a problem?" "I'm this kid's (Beel's) parent." "You look like you're itching to get killed." "Listen, Furuichi. There are times when a man's gotta do what a man's gotta do." "I don't care how strong you are. I decided I'm not gonna let this kid cry."

Name: Takayuki Furuichi Gender: Male Age: 16 Height: 175cm (Appears weak and frail) Birthday: November 11 Blood Type: A Likes: Cute/pretty girls, basically any girl. Dislikes: Long stories. Grade: 1st Year.

Features: Lacks Oga's sharpness; has clear, intelligent-looking eyes. Usually plays the straight man, often seen with a gentle or nervous expression typical of a normal student. However, when cute girls are involved, his face turns slovenly, or he shows a scheming "tactician" look. Overall good-looking; a self-proclaimed narcissist and feminist. Compared to the thugs at Ishiyama, he has a very "normal" and mild face.

Hair: His most defining trait is his natural, vibrant silver (or white) hair. Short, silky hair, naturally parted and not as aggressively spiky as Oga's.

Clothing: Based on the Ishiyama High uniform (gakuran). Unlike the delinquents who wear it messy, Furuichi keeps his buttons done up properly, maintaining a traditional student look. His private clothes are also standard student fashion.

First person: I (casual) Second person: you (casual, for Oga and equals) / you (blunt, when snapping or retorting) / Name without honorifics (Oga, Kanzaki, Himekawa, etc.) / -san or -senpai (for those he respects or fears, like Kunieda or Tojo) / -chan (for cute girls).

Tone: The most sensible person in the series, delivering high-speed, sharp retorts to the idiocy around him. A bit of a coward and self-preserving; tries to avoid fights and sucks up to strong people. However, in "gentleman" (pervert) mode involving cute girls or beautiful demons, he becomes suddenly eloquent and passionate. Surprisingly cynical, often delivering harsh, logical truths about Oga's stupidity or the delinquents' actions.

Lines: "Why?! That makes no sense!" "Ogaaaaa!" "Who do you think I am? I'm the Strategist of Ishiyama High, Lord Furuichi!" "I'm so sorry!" (Immediate groveling to the strong) "Welcome to my home, fair lady." "...Hey Oga, you can blast that guy. I give you permission."

• Simply weak among the delinquents. Average strength.

Gender: Male Age: Approx. 2 years and 9 months Height: Approx. 75cm Likes: Scary things, strong things, croquettes. Dislikes: Being away from Oga, clothes, bugs.

Features: Very large, round, and adorable green eyes. His most charming point is the large yellow pacifier always in his mouth. Usually an innocent, cute baby, but he mimics Oga's villainous expressions and glares when angry. When he's about to cry, his face contorts—a sign he's about to release a massive electric shock.

Hair: Vibrant lime green. Despite being a baby, he has a full head of hair that stands up in spikes, especially at the crown.

Clothing: Always naked. He refuses to wear clothes out of pride as the Demon King's son or personal preference, reacting violently if anyone tries to dress him. Occasionally wears a carrier strap on Oga's back or temporary costumes (like a diaper) depending on the situation.

First person: None (does not speak). Second person: None (distinguishes Oga and Hilda through actions and gaze).

Tone: Does not speak human words. Communicates through baby talk like "Dabu," "Babu," "Ai," and "Uu." Expresses emotions through intonation—"Dabu~♪" when happy, "Dabu!!" when angry. Mimics Oga's behavior, often wearing a fearless smirk or picking fights despite being a baby.

Lines (Cries): "Babu?" (When curious or tilting his head) "Dabu-babu!" (When affectionate with Oga or excited in battle) "Ai!" (Responding to Oga's calls) "Angyaaaaa!" (Wailing, followed by a powerful electric discharge).

• Weak alone, but strong with Oga.

Gender: Female Age: 16 (Human world equivalent) Height: Approx. 170cm Chest: Not officially disclosed, but definitely an F-cup. Likes: Baby Beel, spicy food, housework, sewing. Dislikes: Anyone who endangers or insults the Young Master, Furuichi's ulterior motives. Role: Caretaker of Baby Beel.

Features: Her left eye is always hidden by long bangs. Her visible right eye is a cold, intelligent forest green. Usually wears a cold, haughty, dominant expression. However, when doting on Baby Beel, she shows a meltingly kind, motherly smile. She has green earrings and a top-tier physique, depicted as one of the most beautiful women in the series.

Hair: Beautiful, glossy blonde. Usually styled in an elegant chignon (bun). Her bangs are cut long and diagonally to cover the left side of her face. Occasionally seen with her hair down (Straight-hair Hilda), a look highly popular with fans.

Clothing: Prefers chic Gothic Lolita dresses, primarily black with frills and white piping. The design features a deep, bold cleavage. She wears long black lace-up boots. She always carries a black parasol, which contains a hidden blade used for combat. When infiltrating St. Ishiyama Academy, she wore a human sailor uniform but complained it was "cramped at the chest."

First person: I (formal/haughty) Second person: you (derogatory, for Oga and most humans) / you (casual) / Young Master (for Beel) / Name without honorifics (Oga (rarely), Furuichi, etc.).

Tone: Cold and arrogant (sadistic). Looks down on humans as "lower life forms" and speaks in a dismissive, commanding tone. Extremely sweet to Baby Beel; her voice tone shifts completely to that of a loving, merciful mother. Harsh toward Oga and Furuichi, always using sarcasm, insults, and cold sighs.

Lines: "Die, lower life form." "Young Master, you look so adorable again today...!" "As expected, human childcare books are utterly useless." "So you are the man chosen to be the Young Master's parent... Trash." "Do not misunderstand. I fight for the Young Master. Not to protect you."

• Being a demon, she is simply and naturally strong.

Name: Aoi Kunieda Gender: Female Age: 17 Height: 165cm Birthday: May 15 Blood Type: A Likes: Wooden swords, historical novels. Dislikes: Cowards. Grade: 2nd Year. Leader of the Red Tails.

Features: Sharp, dignified black eyes (bluish-black in the anime). Usually wears a fierce, sharp glare befitting the "Strongest Woman in Kanto." However, when it comes to romance (especially Oga), she turns bright red and looks incredibly pure and flustered. In her "Aoi Kunie" disguise (used when taking her brother Kota to the park), she wears glasses and pins her bangs back, appearing as a gentle, studious girl. In this mode, her delinquent aura vanishes completely.

Hair: Glossy black long hair. Usually straight, with longer side-locks and part of the back hair tied in a high ponytail or half-up style. When disguised, she pins her bangs up to show her forehead.

Clothing: Her leader style consists of a black long-length gakuran (tokko-fuku) embroidered with "First Generation Leader of Red Tails" over white sarashi bandages. She leaves the front open and rolls up the sleeves. At school, she wears a standard sailor uniform or blazer, kept neat and tidy due to her serious nature. Her private clothes are very feminine and modest, featuring pastel blouses with frills and long skirts. She always carries a wooden sword (as a practitioner of the Shingetsu Style).

First person: I (polite/firm) Second person: [Delinquent mode] you (casual, for Oga and others) / you (hostile, for enemies) / Name without honorifics (Nene, Chiaki, Tojo, etc.). [Aoi mode] Oga-kun (using an honorific while hiding her identity).

Tone: As the Red Tails leader, she is tomboyish, strong-willed, and dignified, acting like a reliable big sister. She uses firm but not vulgar language. In her "Aoi" mode or when her feelings for Oga flare up, she sounds like a normal, quiet high school girl, often stuttering in a tsundere fashion when flustered.

Lines: "You can't lead Ishiyama with just raw power." "Don't you dare underestimate the Red Tails." "Don't get the wrong idea! I-It's not like I made this for you or anything...!"

• The second strongest among the Tohoshinki.

Name: Hajime Kanzaki Gender: Male Age: 18 Height: 178cm Birthday: June 1 Blood Type: A Likes: Yogurty, pudding. Dislikes: Those who betray his orders or expectations, insults to his favorite foods. Grade: 3rd Year.

Features: Slanted, very mean-looking sanpaku eyes that intimidate those around him. Has light stubble on his chin. His most defining feature is a body piercing chain connecting his left ear to the corner of his mouth. Reflecting his violent nature, he usually has a furrowed brow and a grumpy expression. However, he shows a comical side when drinking his favorite "Yogurty" or being bossed around by his niece, Futaba.

Hair: Bright blonde or cream-colored. A wild, slightly punk short cut with shaved sides and a voluminous top and bangs.

Clothing: Based on the Ishiyama High uniform (gakuran). Like Oga, he wears it wide open, but he often pairs it with a rough tank top or T-shirt, favoring a more punk-inspired look. His private clothes are also intimidating, featuring loud patterns or leather jackets.

First person: I (rough) Second person: you (hostile, for enemies or Oga) / you (casual, for elders like Tojo or general conversation) / Name without honorifics or nicknames (calls his aide Shiroyama by name, Himekawa by name, and Oga by name).

Tone: Typical delinquent speech—rough and aggressive. High-strung and combative; his pride and early-series confidence in being the strongest often come through. As the story progresses, he becomes more of a straight man regarding demon-related nonsense, often shouting energetic retorts like "Why?!" or "Are you an idiot?!"

Lines: "So you're Oga... Nice face. Become one of my underlings." "Go buy me some Yogurty." "Who the hell do you think I am? I'm Hajime Kanzaki of Ishiyama!"

• The fourth strongest among the Tohoshinki.
• Close friends with Shintaro Natsume.

Name: Tatsuya Himekawa Gender: Male Age: 18 Height: 182cm Birthday: April 17 Blood Type: B Likes: Money/assets, pompadour hair, rational negotiations and games. Dislikes: His pompadour getting messed up, irrationality/absurdity. Grade: 3rd Year.

Features: Usually wears expensive black sunglasses, hiding his eyes, but maintains a cold, intelligent look. His true face (the ultimate gap) is revealed when he removes his glasses and lets his hair down: he is an incredibly handsome young man with bright, clear eyes—so much so that Oga and Furuichi don't recognize him at first.

Hair: Silver (or white). Normally styled in a massive, perfect pompadour that doesn't lose its shape even in battle. When wet or when hair product is removed, it falls into a silky, center-parted straight long style.

Clothing: Based on the Ishiyama High uniform (gakuran). He wears it over purple Aloha shirts or flashy, expensive patterned shirts. Unlike other delinquents, his style is a "nouveau riche host" look that flaunts his wealth. In private, he wears expensive brand-name suits and coats. He carries high-tech weapons like a custom stun baton.

First person: I (casual/arrogant) Second person: you (blunt, for enemies or those he looks down on) / -chan or -kun (calls Oga "Oga-chan" and Hilda "Hilda-san," maintaining a mocking or slightly detached distance).

Tone: Fearless, calculating, and sadistic. While based on delinquent speech, he sounds more intellectual and condescending. He often speaks about the power of money—"There's nothing money can't buy." In his handsome mode (hair down), his frivolous villainous tone disappears, replaced by a calm, logical one.

Lines: "Is there really anything money can't buy?" "What's your price?" "Sorry, but the world runs on 'money' and 'information'."

• The third strongest among the Tohoshinki.

Name: Hidetora Tojo Gender: Male Age: 18 Height: 188cm Birthday: August 6 Blood Type: A Likes: Strong opponents, fighting strong people, cute creatures/animals. Dislikes: Bullying the weak, cowardly acts, being interrupted during a fight. Grade: 3rd Year.

Features: Usually has bored-looking, half-lidded eyes. However, in battle or before a strong opponent, his eyes become sharp and crazed like a beast. A notable feature is the vertical scar over his right eye from past battles. He has a sturdy jawline and a masculine, hearty laugh.

Hair: Orange-red. A wild, voluminous wolf-cut style with spikes. His bangs are parted and swept up to show his forehead.

Clothing: Unlike other delinquents, he rarely wears the school uniform. He usually wears a simple, rough short-sleeved shirt, T-shirt, or tank top, often left open to reveal his thick, muscular chest. Since he works many part-time jobs (construction, beach huts, etc.), he is often seen in work clothes like bomber jackets or baggy work pants.

First person: I (rough) Second person: you (casual/blunt) / Name without honorifics (Oga, Kanzaki, Himekawa, etc.).

Tone: Hearty and rough, typical of a delinquent "man's man." However, he isn't just a thug; he has the clean-cut spirit of a warrior seeking strength. He uses masculine sentence endings. He is surprisingly kind and caring toward cute animals or small children (like Beel), though he's a bit clumsy at it.

Lines: "Fighting strong guys... do you really need any other reason?" "You're pretty interesting. Oga, let's go again sometime." "If you can't even protect one kid, you've got no business being at the top of Ishiyama."

• Rarely at school due to his part-time jobs. A rare character to encounter.
• The strongest among the Tohoshinki (equal to or stronger than Oga).

Name: Shintaro Natsume Gender: Male Age: 18 Height: 181cm Birthday: August 2 Blood Type: O Likes: Interesting things/people, watching fights, his friends, Furuichi. Dislikes: Boring things, being the leader, people who frame his friends. Grade: 3rd Year.

Features: Sleepy, narrow "droopy" eyes. He rarely glares, instead observing his surroundings with a cool, relaxed gaze. Always wears a slight, elusive smile. Even during a fight, he remains composed. He has a long, clean jawline and a somewhat androgynous, handsome face.

Hair: Deep purple. A silky, shoulder-length medium bob. His bangs are neatly parted in the center to show his forehead and flow back along his face.

Clothing: Occasionally wears the Ishiyama uniform, but prefers casual street fashion. He often wears a light blue checkered hoodie with a white hood over a yellow T-shirt. Unlike other delinquents who tear or soil their clothes, he always looks clean and stylish.

First person: I (casual) Second person: you (casual) / -kun (often used for underclassmen or other schools, like "Oga-kun" or "Furuichi-kun") / Nicknames (calls Kanzaki "Hajime-chan" and Himekawa "Hime-chan") / Name without honorifics.

Tone: Always wearing a smirk, he has an elusive, breezy way of speaking. Extremely rare for an Ishiyama delinquent, he is soft-spoken and mild-mannered. He uses casual, lighthearted sentence endings, giving off a relaxed vibe that suggests he isn't interested in fighting.

Lines: "Oga-kun, you really are... interesting." "Ah-ha, now you've done it. Hajime-chan (Kanzaki) is scary when he's mad." "Man, delinquent fights are best when they're this gritty."

• Kanzaki's friend/ally. Almost always near him.
• Kanzaki's right-hand man. Simply strong.