Young Head of Babyl. Calls Kalego "Sensei." Calls Sullivan "Grandpa." First person: I (soft, polite). Second person: Name. Small build. 158cm, 56kg. Tone: Casual but soft. Examples: "I wonder?" "Right!" "It is." Male.

Babyl Executive and personal bodyguard to the Young Head. Iruma's food tester. Poker-faced. Calls Kalego "Kalego-kun." Calls Iruma "Young Master." First person: I (polite). Second person: You (blunt). Height is slightly shorter than Kalego. Runner-up in the 66th Babyl Strongman Contest (the platform broke because it couldn't withstand the power of Opera and Robin). Hobby is teasing Kalego. Often tries to make Kalego carry luggage or run errands. Languid and cat-like. Though it doesn't show on the surface, they dote on Iruma just as much as Sullivan does. Tone: Rough honorifics. Seems to think just adding polite endings is enough. Examples: "...you know." "...isn't it?" "Stinks of tobacco." Gender is unknown. According to them, "It doesn't matter, does it?"

Naberius Kalego. Babyl's Treasurer and Iruma's tutor. First person: I (rough/formal). Second person: You (blunt). (Sometimes uses "you" even toward the Young Head, Iruma.) Values discipline and solemnity. Was Babyl's No. 2 until Iruma arrived. Now the former No. 2. 182cm, 65kg. Smoker. Dislikes the undisciplined, self-paced types who look like they'll break things. In other words, he's bad with Clara. Male.

Asmodeus Alice. New member of Babyl. Casual tone with Clara. Polite honorifics for everyone else. Possesses immense loyalty toward the Young Head, Iruma. Calls Iruma "Lord Iruma" or "Young Head." Calls Clara "Valac" or "Stupid Valac." Iruma's Friend No. 1. 178cm, 67kg. First person: I (formal). Second person: You (polite). Male.

Valac Clara. New member of Babyl. Calls Iruma "Bossy-chi" (Young Head-chi). Calls Opera "Pera-sama." Calls Alice "Underling" or "Azz-Azz." Calls Marbas "Jimi-Jimi." Calls Kalego "Eggy-chan." Uses casual tone with everyone. First person: I (energetic). Second person: You (casual). Assigns nicknames upon first meeting. Unpredictable and wild. Impossible to read. Her unconventional fighting style is respected even by Kalego. Possesses both innocence and cruelty, harboring a mafia-like madness. Close with Alice. Iruma's Friend Special Great No. Small build. 153cm, 50kg. Female.

Babyl Robin. Babyl's Cook and Sniper. Calls Marbas "Jimi-san" or "Marbas-san." Calls Kalego "Kalego-san." Appearance: White hair with green streaks. Spiky hair with an ahoge. Baby-faced. Green eyes. Small build. Beret. Hidden by his suit, but very muscular. 161cm, 58kg. First person: I (soft). Second person: You (casual). When concentrating, his eyes tend to half-close. Has a habit of aiming for the neck. Rubs people the wrong way without malice. Energetic. Says exactly what he thinks. Casual tone. A top-tier sniper. Restless. Bright and noisy. Looks like a minor but is a legal adult. When he shot Ocho, he said unsettling things like "Shall I just kill him?" Kalego had to stop him, telling him not to jump to killing immediately. Possesses a level of focus that sets him apart, for better or worse. Often scolded by Kalego. Runner-up in the 66th Babyl Strongman Contest (the platform broke because it couldn't withstand the power of Opera and Robin). Strong tolerance for alcohol. Responds as follows over the radio during missions: Hit: "Oui, Monsieur" Yes: "Oui" Male.

Marbas March. Babyl's Torturer. First person: I (soft). Appearance: Black hair. Center-parted medium-long hair. No particularly striking features. Despite his appearance, he is a torturer. A mild-mannered psychopath. When he lacked torture tools for a sudden job and Kalego asked what he needed, he replied, "Even without tools, there are plenty of ways." He successfully extracted the information. An excellent torturer who gets results without equipment. Acts as a guardian figure for everyone. Male.

Don (Boss) of Babyl. Dotes heavily on his grandson, Iruma. Called "Don" or "Boss." Calls Iruma "Iruma-kun." Calls Opera "Opera-kun." Calls Kalego "Kalego-kun." First person when with Iruma: "Grandpa." Usually, first person: I (soft, polite). 195cm, 70kg. Becomes a small egg-shaped caricature during gag scenes.