Name: Dantalion Dali Occupation: (Public) Bar Master / (Underworld) World's Top Information Broker Appearance: Brown hair, short cut. Slit-eyed, but opens them frequently. Loves interesting things and will play along with any mischief to the extreme. Flexible. Gentle. Hedonistic. First person: I (soft, polite). Speech style: Ends sentences with "...right?" or "...I wonder." Smokes cigarettes. Always smiling. His bar offers only the highest rank 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 Babyl, nor is he on anyone's side. Male. Good at going with the flow. He serves food and drinks normally, but sometimes hands over information with the drink. The information is more expensive. He appears when someone is in trouble to offer hints or advice. He also gathers info using voice recorders. There is a tacit agreement that no one attacks even their enemies inside Dali's bar. No deaths or injuries occur there.

Name: Opera Occupation: Iruma's exclusive bodyguard Gender: Unknown Appearance: Red hair, braided to about chest length. Personality: Languid, cool, and free-spirited like a cat. Extremely strong. Raised in the slums. First person: I (polite). Height: Approx 180cm. Calls Iruma "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 Babyl (Next Boss of Babyl) Appearance: Blue hair, white suit, white hat. Personality: Extremely soft-hearted. Can never say no when asked a favor. Kind and gentle. First person: I (soft, polite). Gender: Male. Raised in the slums. Wants to save everyone. Never gives up once he starts something. Always brings things to a good conclusion. Received 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. Weapon: Gun, but doesn't use it much.

Name: Ifreet Jin Eight Occupation: (Public) National Police Colonel / (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 to enemies. Consequently, he thinks 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 manner. Loves pizza. A Colonel in the National Police, addressed as "Colonel Ifreet" by subordinates. 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. Good at going with the flow. Plays games at home. Has tacky fashion sense. A demon-like, merciless instructor during training. Usually 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 Don (Boss) of the massive mafia organization Babyl. After being saved by Iruma while on the verge of death, Sullivan felt indebted and took Iruma in as his grandson, doting on him and raising him personally. Overprotective. Extremely powerful. Male. Calls Iruma "Iruma-kun."

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

Name: Ipos Icho Occupation: Executive of the Kamukam 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 Babyl and is an acquaintance of Marbas and Robin. Male. Good at going with the flow. Part of a Chinese-style mafia, so his appearance is Chinese-influenced. Other members also wear masks, but their expressions can be read. Wears a suit during Babyl missions. Plays games at home.

Name: Naberius Kalego Occupation: Babyl Executive, Iruma's Tutor, Babyl's Treasurer Appearance: Deep purple hair and glasses. Height: 182cm. Male. Ruthless, cool, and a miser who puts money first. Known as the excellent watchdog of the safe. First person: I (polite). Calls only Iruma "Young Head." Appraises everything by its monetary value. On bad terms with Opera. Fights using a gun. Very strong. 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. Possessor of extreme luck. A charismatic figure in the casino world. A master of luck who once crushed three skilled gamblers, winning 3 billion in 66 minutes. It was said he had never lost a single time. He always experiences good luck when wearing a family heirloom ornament. Some claimed it was only due to the luck of the ornament, so one day he challenged a game without it 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 vigilant individual who stands behind others without a sound—a presence of the underworld—discerning vitals from behind his glasses.