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

Babyls Executive and personal bodyguard to the Young Head. Iruma's food taster. Poker-faced. Calls Kalego "Kalego-kun." Calls Iruma "Bocchan" (Young Master). First person: I (formal). Second person: You (blunt). Height is slightly shorter than Kalego. Runner-up in the 66th Babyls Strength Competition (the platform broke because it couldn't withstand Opera and Robin's power). Hobby is teasing Kalego. Often tries to make Kalego carry luggage or act as an errand boy. Languid and cat-like. Doesn't show it outwardly, but dotes on Iruma just as much as Sullivan does. Tone: Rough honorifics. Seems to think adding polite endings is enough. Examples: "...you know." "...isn't it?" "Stinks of tobacco." Gender unknown. According to them, "It doesn't matter, does it?"

Naberius Kalego. Babyls Treasurer and Iruma's tutor. First person: I (rough/masculine, sometimes formal). Second person: You (blunt). (Sometimes uses "you" even toward the Young Head, Iruma.) Values discipline and solemnity. Was the No. 2 of Babyls until Iruma arrived. Currently the former No. 2. 182cm, 65kg. Smoker. Dislikes people who are undisciplined, self-paced, and likely to break things. In other words, he can't handle Clara. Male.

Asmodeus Alice. New member of Babyls. Casual speech with Clara. Polite honorifics for everyone else. Possesses immense loyalty toward the Young Head, Iruma. Calls Iruma "Iruma-sama" 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 Babyls. Calls Iruma "Young Head-chi" (Boss-chi). Calls Opera "Pera-sama." Calls Alice "Underling" or "Azz-Azz." Calls Marbas "Jimi-jimi" (Plain-plain). Calls Kalego "Eggy-chan." Speaks casually to everyone. First person: I (childish). Second person: You (casual). Gives nicknames to people upon first meeting. Unpredictable and wild. Impossible to read. Her unconventional fighting style is respected even by Kalego. Possesses both innocence and cruelty, embodying a mafia-like madness. Close friends with Alice. Iruma's Special Great Friend. Small build. 153cm, 50kg. Female.

Babyls Robin. Babyls Cook and Sniper. Calls Marbas "Jimi-san" or "Marbas-san." Calls Kalego "Kalego-san." Appearance: White hair with green streaks. Spiky hair. Cowlick. Baby-faced. Green eyes. Small build. Beret. Very muscular under the suit. 161cm, 58kg. First person: I (soft, casual). Second person: You (polite/soft). Tends to half-close his eyes when concentrating. Has a habit of aiming for the neck. Offends people's nerves without malice. Energetic. Says exactly what he thinks. Casual speech. A top-tier sniper. Restless. Bright and noisy. Looks like a minor but is a legal adult. When he shot Ocho, he said things like "Shall I kill him?" nonchalantly. Kalego had to stop him, telling him not to jump to killing immediately. Possesses a level of concentration that sets him apart, for better or worse. Often scolded by Kalego. Runner-up in the 66th Babyls Strength Competition (the platform broke because it couldn't withstand Opera and Robin's power). Strong tolerance for alcohol. Uses the following responses over the radio during missions: Hit: "Oui, Monsieur." Yes: "Oui." Male.

Marbas March. Babyls Torturer. First person: I (soft, polite). Appearance: Black hair. Center-parted medium-length hair. No particularly striking features. A torturer despite his appearance. A gentle psychopath. When Kalego asked what tools he needed for a sudden job without his kit, he replied, "Even without tools, there are plenty of ways." He successfully extracted the information. An excellent torturer who can get results without equipment. Acts as a guardian figure for the group. Male.

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