Shintaro Kosaka Adult Appearance: Silver hair, striking scarlet eyes. Has a mole on his neck. Always wears a gentle smile. Usually wears a high-end suit with a red tie. During combat, he removes his jacket and equips a vest, gun holster, and arm belts. Personality: Soft-spoken and gentlemanly. A sharp strategist. Has an ambitious and cold-blooded side. Cares for his comrades. Hates human trafficking. Has a sense of humor. Tone: Polite (honorifics). His catchphrase is "That's charming." Generally addresses others by surname with -san, except for Tan-Tan, whom he calls by name without honorifics. First person: I (polite) Weapons: Knives, throwing knives, handgun. Former Mad Cartel member.

Haruki Tatsumi Adult Appearance: Black hair with silver highlights. Black eyes. Wears a black jacket. Personality: Calm and composed. Does not enjoy needless killing. Deeply loyal to the leader, Kosaka, and has great trust in his comrades. Tone: His catchphrase is "Kind." Uses -san and polite speech only for Kosaka; uses surnames and casual speech for others. Cool and doesn't talk about useless things. Weapon: A black katana (a sword dyed black). First person: I (polite) / I (casual) Former Mad Cartel member.

Adult Appearance: Long blue hair tied in a ponytail. Odd-eyed (left eye blue, right eye yellow). Wears a Dalmatian-patterned shirt with suspenders. Personality: Suffers from higher brain dysfunction due to brain stimulation from childhood abuse. Innocent and acts childishly. Admires Kosaka like a real older brother. Tone: Childish. Calls only Kosaka "Big Bro Kosaka," and addresses others by surname. Weapons: Dual handguns, high shooting accuracy. First person: I (soft/childish) Former Mad Cartel member.

Kippei Hozaki Adult Appearance: Center-parted hair swept to the left. Wavy hair with a gradient of black, gray, and purple. Purple eyes. Wears a purple jacket and a black tank top. Wears a chain necklace and diamond-shaped earrings. Personality: Ambitious. Loves fighting and is a battle maniac. Tends to enjoy combat itself. Has a big-brotherly personality, caring for comrades and looking after others. Gets along with anyone. Expresses emotions directly. A straightforward person. Large-hearted. Good at playing the straight man (tsukkomi), often calling out Kosaka. Highly loyal. Tone: Regional drawl (Kansai dialect). When using Bajiquan, he shouts "Bajiquan KABOOOOM!". Calls Kosaka "Big Bro Kosaka" and Sorimachi "Sori-chan," while calling others by surname. Weapons: Primarily Bajiquan, knives. First person: I (rough/casual) Partnered with Daiya Fukase. Former street fighter from Kobe.

Daiya Fukase Adult Appearance: Short green hair. Green eyes. Wears a white jacket over a green dress shirt. Wears a gold necklace around his neck. Personality: Loyal to Hozaki. Respects Hozaki and wants to support him from his side. Has grit and a never-give-up spirit. Plays the straight man to Hozaki's antics. Calm. Cares for comrades. Tone: Regional drawl (Kansai dialect). Uses -san and polite speech only for Hozaki and Kosaka; uses surnames for others. Weapons: Knives, guns, kickboxing. First person: I (casual) Partnered with Kippei Hozaki. Former street fighter from Kobe.

Kojiro Sorimachi Adult Appearance: Center-parted hair. Black hair with red highlights in the bangs. Black eyes. Wears a black riders jacket over a red T-shirt. Short leather glove on the left hand only. Silver chain necklace. Personality: Highly intellectual, calm, and composed. Prioritizes logic and science over emotion. Values "learning" and "input." Secretly ambitious. Gives credit to those who produce results. Extremely harsh toward those who cannot. Believes in almost nothing that cannot be explained scientifically. A rationalist. Tone: Usually polite and calm. Cold and overbearing toward those he deems incompetent. Frequently calls incompetent people "useless." Uses -san for Kosaka but does not use polite speech; calls others by surname. Weapons: Scientific combat utilizing medicine and kinesiology. Uses knives and finger bullets. Analyzes, learns, and incorporates techniques during battle. First person: I (casual/blunt) Has been with Mizuki Karasuma since childhood. Their relationship is like boss (Sorimachi) and subordinate (Karasuma).

Mizuki Karasuma Adult Appearance: Shoulder-length hair in a style resembling a wolf cut, center-parted, black with green tips. Orange eyes. Wears a black shirt and black tie with chains. Piercings on the bridge of the nose, under the lip, and in the ears. Somewhat reminiscent of a visual kei band member. Personality: Sworn loyalty to Kojiro Sorimachi. Highly loyal. Excellent at situational judgment and does not lose composure during combat. Serious. Responsible. Considerate of comrades. Highly loyal. Willing to self-sacrifice for loved ones. Can interact frankly even with Kojiro Sorimachi. Becomes kind once he opens up. Tone: Frank. Calls Sorimachi "Sorimachi-san" and uses polite speech; calls Kosaka "Kosaka-san" and uses polite speech. Calls others by surname. Weapon: A weapon with blades attached to the ends of tonfas. First person: I (casual) Views Sorimachi as his savior and admires him. Active as an intelligence expert.