All-Genre: Iruma-kun Has Become a Demon!

Mairimashita! Iruma-kun (Japanese: 魔入りました！入間くん) is created by manga artist Osamu Nishimura and is set in a fantasy demon academy. The story centers on the human boy "Iruma Suzuki," who was sold to a demon by his parents. He hides his true identity while attending a demon school, leading to a series of hilarious and heartwarming school life adventures with his "Problem Children Class" companions who have distinct personalities.

Here is a detailed analysis of the main characters' settings:

👹 Protagonist Group and the Problem Children Class (Heretic Class)

This group of distinct demon students surrounds Iruma, growing together and facing various trials. Iruma Suzuki (鈴木イルマ) Identity: Human boy, grandson of the demon chairman Sullivan. Traits: Super nice guy, unable to refuse anyone's requests. Lived an extremely miserable and exploited life in the human world, developing "overwhelming crisis avoidance abilities." Magic Item/Ability: Possesses the Ring of Gluttony of the great demon Dalila, which can devour and release powerful magic. Becomes extremely kingly when activating "Blood Lust."

Asmodeus Alice (アスモデウス·アリス) Identity: Eldest son of a prestigious flame-element family. Traits: Top of the entrance exam. Initially held hostility towards Iruma, but after losing to Iruma in a duel, became his loyal friend and attendant. Magic Item/Ability: Proficient in "Bloodline Magic" that manipulates powerful flames, ranking among the top in the class.

Valac Clara (ウァラク·クララ) Identity: Eccentric female demon. Traits: Naive, lively, and noisy personality, often sticking close to Iruma. Magic Item/Ability: Bloodline magic is "Toy Box," able to infinitely pull out any item imagined in her mind from her pockets or body.

Jaz (アンドロ·M·ジャズ) Traits: A stylish thief-type demon with keen observation skills. Magic Item/Ability: Bloodline magic "Treasury," able to hide oneself or steal others' sight, items, and defenses.

Shax Lied (シャックス·リード) Traits: A demon boy obsessed with games and gambling, best friends with Jazz. Magic Item/Ability: Bloodline magic "Sense Deprivation," able to temporarily strip and manipulate others' five senses.

Asmodeus Ameri (アザゼル·アメリ) Identity: Student Council President, daughter of the Thirteen Crown "Anri." Traits: Strong exterior, but a pure-hearted maiden inside, full of admiration for the human world. Magic Item/Ability: "King of Fantasy" can materialize what she believes in and strengthen herself.

Purson Soi (プルソン·ソイ) Traits: Extremely low presence, accustomed to hiding in the shadows with a mask, introverted but highly talented. Magic Item/Ability: "Invisibility" can completely erase one's presence and aura.

Crokel Kerori / Irodori Kerori (クロケル·ケロリ / イロドリ·ケロリ) Identity: Sea demon tribe, popular demon idol "Spii (スッピィ)." Traits: Sweet in front of people, with a strong contrast and ambition behind the scenes. Magic Item/Ability: Can control ice and snow, transforming it into powerful stage effects and combat power.

Sabnock Sabro (サブノック·サブロ) Identity: Demon King worshipper, unrestrained personality. Magic Item/Ability: Bloodline magic "Body Expansion," able to partially enlarge the body by consuming specific minerals, possessing immense strength.

Gaap Goemon (ガープ·ゴエモン) Identity: Wind-element demon, reveres Bushido spirit. Magic Item/Ability: Uses bloodline magic "Wind Wind" to cleave all objects.

Kimaris Shiro (キマリス·シロ) Identity: Half-beastman and demon hybrid, calm and loyal personality.

Bishamon Gorgon (ベチ·ゴルゴン) Traits: Possesses petrifying demonic eyes, relatively introverted personality.

🏫 Demon School Faculty and Key Figures

Strict teachers and high-ranking officials managing Babyls. Naberius Callego (ナベリウス·カルエッゴ) Identity: "Problem Children Class" devilish instructor, beast tamer teacher. Traits: Stern and cold exterior, extremely strict with students, often called the "gloomy teacher." Magic Item/Ability: Can summon super-powerful demonic beasts. Under Iruma's contract, is forced into a fluffy familiar state.

Sullivan (サリバン) Identity: Chairman of Babyls, one of the current Three Great Demons, highly likely to become the next Demon King. Traits: Dotes on his grandson Iruma, cheerful personality but unfathomably powerful.

Opera (オペラ) Identity: Chairman Sullivan's loyal attendant. Traits: Nekomata demon, calm, collected, and unfathomable personality. Skilled in cooking and housework, and is Callego's senior.

Bals Robin (バルス·ロビン) Identity: "Problem Children Class" assistant instructor, rookie teacher. Traits: Passionate, simple personality, greatly admires Callego and Iruma.

Dalí (ダ利) Identity: Babyls Dean of Students, frivolous but sharp-witted.

Amduscias Poem (アムドゥスキアス·ポエム) Identity: Entertainer professor, flamboyant and loves extravagance.

👑 Three Great Demons and Thirteen Crowns (Demon Realm's Pinnacle)

Rulers and key decision-makers of the Demon Realm. Belial (ベリアール) Identity: One of the Three Great Demons, member of the Thirteen Crowns.
Amaiimon (アマイモン) Identity: One of the Three Great Demons, member of the Thirteen Crowns, personality like a playful child who never grows up.
Behemoth (ベヘモット) Identity: One of the Thirteen Crowns, immense physique.
Baal (バール) Identity: One of the Thirteen Crowns, the Thunder Emperor. A dangerous figure attempting to stage a coup in the Demon Realm.

Battalion and Family Key Figures

Important supporting characters closely related to plot progression. Kisch Orobos (キッシュ·オロバス) Identity: Member of the Darius Magic Item Research Battalion, Iruma's formidable opponent.
Rei (レイ) Identity: Powerful senior demon, serves as battalion instructor.
Leiji (レイジィ) Identity: Son of the Thunder Emperor, possesses a powerful background.

In Mairimashita! Iruma-kun, the main antagonistic forces primarily revolve around the "Six Fingers," who aim to overthrow the Demon Realm's order, and terrorists lurking within the demon school. Most of these villainous characters possess twisted values or extreme demon supremacy.

Here is a detailed analysis of the core villain characters in this work:

Core Villain Organization: Six Fingers (六指)

The Six Fingers are a terrorist organization aiming to disrupt the existing order of the Demon Realm and unleash the chaotic state before "Blood Lust." All members possess high levels of stealth and disguise abilities. Mige/Mige Mamimon (ミケ/ミケ・マミモン) Leader and strategist of the Six Fingers. Responsible for planning multiple large-scale attacks, such as the Walter Park incident. Extremely cold-hearted, views others' lives as pawns, skilled at controlling the overall situation.
Atum (アットム) Member of the Six Fingers. Possesses a瘋狂 and cruel personality, with a highly destructive fighting style. Has a close cooperative relationship with Kirio, specializing in creating chaos.
Shiro (シロ) Member of the Six Fingers. Skilled in disguise and information gathering, often infiltrates various important occasions for reconnaissance.
Beretta (ベレッタ) Member of the Six Fingers. Mysterious in appearance and abilities, responsible for logistics and support tasks. Antagonists lurking in the Demon School Core characters secretly plotting conspiracies within the campus and posing direct threats to Iruma and others. Azazel Kirio (アザゼル・キリオ) Former head of the Magic Item Research Battalion, later joined the Six Fingers. Appears as a weak and cute senior, but actually suffers from severe "Despair Fanaticism." Believes that pushing others from happiness to despair is the most beautiful art. Bloodline magic is [Enhancement and Shrinkage], capable of greatly enhancing the destructive power of tiny objects.
Andro M. Jazz / Andro M. Polo (アンドロ·M·ジャズ/安度西亞斯·波羅) A legendary problematic demon at the demon school.
His true identity is one of the founders of the Six Fingers, possessing immense power. Aims to reshape the Demon Realm's order through destruction.
Hidden and Side Story Antagonists Och (オチョ) Spy who infiltrated the Harvest Festival. Appears as a participant or harmless demon on the surface, but is actually responsible for covert observation and sabotage. Retreats after being severely injured by Bals Robin.

In Mairimashita! Iruma-kun, the faculty of the demon school "Babyls" is vast and has distinct personalities. Here are the character settings and backgrounds of the core faculty members:

Core Faculty Naberius Callego (Voice Actor: Daisuke Ono) Identity: "Problem Children Class" instructor, Chief of Discipline. Setting: Stern, meticulous personality, catchphrase is "Silence." Due to an accident becoming Iruma's familiar, he is particularly strict with Iruma, but is actually extremely dedicated. His family has served as Babyls' "guard dog" for generations, inheriting the magic of the black dog Cerberus.
Baram Shichiro (Voice Actor: Katsuyuki Konishi) Identity: Biology teacher, demon beast expert. Setting: Although his appearance is like a terrifying monster covered in spikes, he has an extremely gentle heart, loves small animals, and is deeply loved by students. He was a classmate and close friend of Callego during their school days.
Azazel Anri (Voice Actor: Koji Yusa) Identity: Student Council Advisor, Captain of the Demon Realm Border Guard. Setting: Father of Student Council President Ameri. Stern personality and a "daughter complex," initially very wary of Iruma, but gradually recognizes his abilities.
Dalí (Voice Actor: Mark Ishii) Identity: First-year homeroom teacher. Setting: Frivolous, cheerful personality, often serves as commentator and host for school events and special tests.
Malphas Mar (Voice Actor: Hiro Shimono) Identity: Cultural History and Basic Magic teacher. Setting: Appears as a short demon wearing a mask, gentle personality, responsible for teaching students basic magic theory.
Robin (Voice Actor: Takuto Yoshinaga) Identity: Rookie teacher. Setting: Passionate, energetic (even a bit scatterbrained) personality, is an archer, greatly admires Callego.
Lime (Voice Actor: Nao Toyama) Identity: Charm Magic teacher. Setting: Succubus tribe, cute appearance, unique teaching style.
Suki (Voice Actor: Yumi Hara) Identity: Physical Education teacher. Setting: Tall, bold appearance, responsible for guiding students' physical fitness and combat training.

Chairman and Hidden Mentor Sullivan (Voice Actor: Chō) Identity: Chairman of the Demon School, one of the Demon Realm's "Three Great Demons." Setting: One of the Demon King candidates. Bought Iruma because he wanted a grandson and dotes on him. His power is unfathomable, and he often secretly resolves the troubles Iruma causes.
Opera (Voice Actor: Mitsuki Saiga) Identity: Sullivan's attendant, also holds the status of senior and mentor. Setting: Extremely high rank, Sullivan's senior during his school days, calm, unfathomable personality, excellent cook, often gives Iruma practical advice.

Special Instructors for the Problem Children Class (Harvest Festival Arc)

To help the "Problem Children Class" reach "Rank 4" before their second year, the school hired seven renowned demons from the Demon Realm to serve as special instructors: Gentleman of Discipline Mr. Hat (Voice Actor: Masami Iwasaki): A gentleman demon skilled in summoning.
Weeping Empress Wei Pei (Voice Actor: Mariko Futa): An excellent water manipulator.
Guard Chief Strice: Former head of the Demon Realm Prison specializing in binding magic.
Undying Old Man Gorgon: A strict teacher specializing in poisons, who disregards students' lives.
Lodi: A demon skilled in stealth operations.
Murumuru: An extremely fast training teacher.
Kirara: Responsible for charm and potential awakening.

In Mairimashita! Iruma-kun, students at the demon school "Babyls" perform "Familiar Summoning" at the beginning of the school year to form contracts. Here is a list of the familiars of the protagonist Iruma and the main characters of the "Problem Children Class":

Iruma Suzuki: Contract familiar is teacher Naberius Callego (accidentally summoned, transforms into a fluffy chibi bird).
Asmodeus Alice: Contract familiar is a snake (a Gorgon snake skilled in flame magic).
Valac Clara: Contract familiar is Fafnir (a mysterious creature resembling an old man, can pull out various items from his pockets).
Naberius Callego: Naturally possesses the abilities of Cerberus (three-headed hellhound), later becomes Iruma's familiar.
Other Problem Children Class members:

Lied (familiar is a Riptail Wolf), Kamui (familiar is a giant owl), etc. Most contract beasts are powerful demonic beasts.