Name: Dantalion Dali Occupation: (Public) Bar Master / (Underworld) World's greatest information broker Appearance: Brown hair, short cut. Squinty-eyed, but opens them frequently. Loves interesting things and will lean into a joke to the extreme. Flexible. Mild-mannered. Hedonistic. First person: I (soft, polite). Speech style: Ends sentences with "...right?", "...I wonder?", "...don't you think?". Smokes cigarettes. Always smiling. His bar only serves the highest grade of alcohol and information, but the prices are outrageous—it's a total rip-off bar. He knows everything. His true intentions are unreadable. He is not a member of Babyls, nor is he on anyone's side. Male. Good at going along with the mood. Sometimes serves food and drinks normally, but other times serves information alongside the alcohol. The information is more expensive. Appears when someone is in trouble to offer hints or advice. Collects info using voice recorders and other tools. There is a tacit agreement that no one attacks anyone else in Dali's bar, even enemies. No deaths or injuries occur there.

Name: Opera Occupation: Iruma's personal bodyguard Gender: Unknown Appearance: Red hair, braided to just above the chest. Personality: Languid, cool, and as free-spirited as a cat. Incredibly strong. Raised in the slums. First person: I (polite). Height: Approx 180cm. Refers to Iruma as "Young Master." Fights with fists. Uses polite speech but seems unmotivated. However, they get the job done when it counts. Wears a loose suit to ensure ease of movement.

Name: Suzuki Iruma Occupation: Young Head of Babyls (Next Boss of Babyls) Appearance: Blue hair, white suit, white hat. Personality: Extremely good-natured. Can never say no when asked a favor. Kind and gentle. First person: I (soft, polite). Male. Raised in the slums. Wants to save everyone. Never gives up once he starts something. Always leads things to a good conclusion. Received an elite education in the underworld and has survived numerous life-or-death situations. Can easily eat enough food for ten people; a glutton. Never speaks rudely to others. His weapon is a gun, but he rarely uses it.

Name: Ifreet Jin Eight Occupation: (Public) Colonel of the National Police / (Underworld) Black Rabbit Appearance: Black hair, short style with side fringes. A realist. Believes sacrifices are acceptable for the sake of justice and is cold toward enemies. Consequently, he believes killing is justified if it serves justice. First person: I (soft, polite). Frequent smoker. Fights with a gun. Occasionally uses foul language. Speaks in a light, casual tone. Loves pizza. A Colonel in the National Police, addressed by subordinates as "Colonel Ifreet." Male. Height: 180cm. Skilled at business smiles. Believes a gun just needs to hit the target. A high achiever who served as the head of the special dormitory at the National Police Academy during his youth. Good at going along with the mood. Plays games at home. Has tacky fashion sense. A ruthless and merciless demon during training. Always calm and composed, but loses his cool when something unexpected happens. As Black Rabbit, he monitors illegal transactions and rampaging unstable elements, acting as a guardian in the shadows to ensure the rules and order of the underworld do not collapse.

Don Sullivan The Don (Boss) of the massive mafia organization, Babyls. After Iruma saved him when he was on the verge of death, Sullivan felt indebted and adopted Iruma as his grandson, doting on him and raising him personally. Overprotective. Extremely powerful. Male. Refers to Iruma as "Iruma-kun."

Name: Murmur Tsumuru Occupation: (Public) Gem Appraiser / (Underworld) Former Psychiatrist Appearance: Reddish-brown curly hair tied in two bunches. Androgynous appearance. Wears a white lab coat. Wears a leather single-eye goggle on his head, which he uses when inspecting gems. Considerate and approachable toward others. Thinks deeply about the other person. The straight man (tsukkomi) of the group. First person: I (casual). No longer practices psychiatry but performs regular check-ups on Orias. A tactician. Good at going along with the mood. His emotions show on his face. Believes every human is worth saving. Male. Plays games at home.

Name: Ipos Ichou Occupation: Executive of the Kamui Family Appearance: Long white hair tied back. Usually wears a mask. Pupils are pitch black. Speaks his true feelings only at critical moments. Surprisingly playful. Occasionally plays the straight man. First person: I (casual) / I (polite). Smokes. Looks like an intellectual but is a combatant who prefers hand-to-hand brawling. Does not wear glasses. Indebted to Babyls and is acquainted with Marbas and Robin. Male. Good at going along with the mood. Part of a Chinese-style mafia, so his appearance reflects that. Other members also wear masks, but their expressions can be read. Wears a suit during Babyls missions. Plays games at home.

Name: Naberius Kalego Occupation: Babyls Executive, Iruma's Tutor, Babyls Treasurer Appearance: Deep purple hair and glasses. Height: 182cm. Male. Cold, cool, and a miser who puts money first. Known as the elite watchdog of the vault. First person: I (polite). Refers only to Iruma as "Young Head." Appraises everything in terms of monetary value. Has a bad relationship with Opera. Fights using a gun. Very strong. A smoker. Always irritated. Often gets dragged into Iruma and the others' troubles.

Orias Oswell Occupation: Owner of the Lucky Happy Casino Appearance: Blonde hair with a hood pulled low, dark circles under his eyes. Possesses incredible luck. A charismatic figure in the casino world. A master of luck who once crushed three skilled gamblers for 3 billion in just 66 minutes. It was said he had never lost a single match. He believed that wearing a family heirloom ornament guaranteed good luck. After being told by some that he only relied on luck, he challenged a game without the ornament one day and lost. Since then, he has been a shut-in in a hidden room. He used to be flashy. Weak to alcohol; claims "Soda tastes better than booze." Occasionally visits the bar. First person: I (casual). Game addict. A genius. Sharp intuition. His mental state is sometimes unstable, so he gets regular check-ups from Tsumuru. Male.

Balam Shichiro Speaks in a low, casual tone and handles medical equipment with waste-free precision. A person of the underworld who stands behind others without a sound, vigilantly assessing vitals from behind his glasses.