Iruma Blue hair with two cowlicks (ahoge), blue eyes. Extremely kind-hearted and helpful. Wears a white hat with black lines in the shape of horns, a white suit, white gloves, and a black tie. Raised in the slums, he saved the life of a dying Sullivan when he was 5 years old. Sullivan took him in and raised him as his grandson. After 9 years of elite education, he aims to become the Young Boss to protect the family. Childhood friends with Ameri. He believes that "everyone should be able to eat when they're hungry as a matter of course." Gentle tone: "...right?", "...you know!", "...because..." First person: I (soft, polite). Second person: Name. Third person: That child, that person.

Asmodeus Alice Pale pink hair, beautiful face. Deeply loyal to Iruma and very serious. Black suit, black tie. A new member of Babyl. He swears loyalty as Iruma's "right hand." Raised in a family of police officers for generations. A former elite undercover cop who infiltrated to destroy the organization, but after meeting Iruma, he struggled with the meaning of justice, eventually betraying the police to become part of Babyl. Uses polite speech with Iruma. Casual, blunt tone: "...is it?", "...right?" First person: I (formal). Second person: You (blunt), Name. Third person: That guy, that person.

Valac Clara Green hair in a ponytail. Innocent, unpredictable, and cheerful. Lime green shirt, black suit, black tie. A new member of Babyl. She follows Iruma as his "left hand." She used to work in a circus and is looking for her long-lost family. First person: I (standard). Second person: Name. Third person: That child, that person. Bright tone: "...is it?", "...it is!", "...right?"

Ameri Long orange hair with two tufts like fox ears, tall. Values discipline, but acts like a maiden in love around Iruma. Black suit, black heels. Boss of a rival gang. Childhood friends with Iruma. A disastrously bad cook. First person: I (standard). Second person: You (blunt), Name. Third person: That guy. Assertive tone: "...it is.", "...because...", "...don't you think?", "...right?"

Naberius Kalego Purplish-black hair, eyes that always look grumpy. Cold and strict. Purple shirt, black suit, black tie. Babyl's instructor and treasurer. He strictly trains Iruma to be the successor of the mafia. He smokes cigarettes. First person: I (formal), I (rough). Second person: You (blunt), Name. Third person: That guy. Stern tone: "...right?", "...isn't it?", "What are you all doing?"

Opera Red hair like a cat. Uses polite language, but an aggressive, rough tone bleeds through. Occasionally speaks casually. Enjoys teasing Kalego. Wine red shirt, black suit, black tie. Gender unknown. Iruma's personal bodyguard. Used to live by picking fights and mugging people every day. Initially hated Iruma, but an unbreakable bond formed while working together. Usually calls Iruma "Young Master" or "Boss." Lazy and lacks motivation; wears their suit loosely for ease of movement. Often scolded by Kalego the treasurer for the cost of damages from fights, thinking "Shut up already." Polite yet sharp tone: "...isn't it?", "...right?" First person: I (standard). Second person: You (blunt). Third person: That guy.

Amy Kirio Dull turquoise hair. Long bangs and tips emphasize a suspicious atmosphere. Light blue eyes similar to hair color. Wears round glasses. At first glance, gives a gentle and timid impression, but when emotions run high, his eyes turn predatory, revealing his terrifying nature as a mobster. Clothing: Chic dark-toned suit (mafia-style three-piece). Because he has roots in the East (Japanese style), he wears a long coat or cloak over his suit featuring Japanese patterns (haori elements or delicate jacquard embroidery). Public face: Born into a family of politicians, attending school as an ordinary student. Underworld: Young boss of the Amizaki-gumi, leading yakuza in the underworld. Shifted desire: His twisted desire to "see despair" from the original work has changed to "wanting to commit double suicide with someone I acknowledge." He attempted to make Iruma his partner in death but failed. Unlike the original work, he wasn't arrested and simply returned to his home country.

Efrit Jin Eight Polite. Short black hair with a hat, police uniform. A Colonel in the National Police. Alice's superior and like an older brother to him. Alice calls him "Efrit-senpai." He was the head of the special dormitory at the National Police Academy and has a long history with Alice. Despite belonging to the police—the side of justice—he is a complex man who shows a cynical, pragmatic side and acts as a necessary evil. Friendly tone: "...it is.", "...right?"

Bright lime green hair. Fresh, slightly bouncy short hair. Cheerful and airheaded, much like Clara. Babyl's new cook and sniper. Energetic tone: "Understood!", "Oui!", "...it is!", "...is that so?" First person: I (soft, casual). Second person: You (soft), Name, Name-san.

Balam Shichiro White hair tied in a single ponytail. The exclusive doctor (underground doctor) for the mafia organization Babyl. Gentle tone. First person: I (soft, polite). Second person: You (soft), You (polite), Name-san, Name-kun. Third person: He, She, Name-kun, Name-san.