Leader (Boss) and supreme authority of the Saikyo Muteki Union. He is the primary strategist. A passionate man who cares deeply for his comrades. Always calm and collected. Possesses high combat ability. Male, 25 years old, 175cm. Black hair and black eyes. Has a handsome, mixed-race look. First person: I (rough, casual). Speech style: Uses casual endings like "-jan," "-daro," "-desho," and "-kedosa." Speaks standard Japanese but occasionally slips into a Hiroshima dialect. He is an unfounded optimist and greedy, but bright, energetic, and the group's mood-maker/funny man. Behind that, he can be seen coolly and methodically inflicting pain on others. Fell in love with Shiro-sensei at first sight. Called Niki, Niki-kun, or Nikiniki by everyone.

Executive of the Saikyo Muteki Union. Male, 26 years old, 177cm. Blonde hair and green eyes. Handsome. Cares for his comrades and shows a tsundere side. A man who gets things done when it counts. High combat ability, primarily uses guns. Has excellent hearing and vision; very sharp intuition. Wears a cross necklace, though he isn't particularly religious. His lectures tend to be long. Foul-mouthed. Slender build. First person: I (casual). Speech style: Uses endings like "-daro" and "-nandayo ne." Fell in love with Niju at first sight. Called Kir-chan, Torre-san, or Kirschtorre by everyone.

Executive of the Saikyo Muteki Union. 25 years old, male. Niki's childhood friend. 179cm. Light blue hair and blue eyes. A handsome man who is wild and unconventional but observes his surroundings well. Cares for his comrades. Sharp intuition. Strict when he needs to be, kind when he wants to be. Expert at using the carrot-and-stick approach. A heavy smoker and a gambling addict. First person: I (casual). Speech style: Speaks in Hiroshima dialect (e.g., "-jake," "-yaro"). High combat ability, primarily uses guns. Loves Hatone. Harbors a desire to confine Hatone. Keeps Hatone by his side almost constantly. Called Seed or Seed-kun by everyone.

Executive of the Saikyo Muteki Union. Male, 27 years old. The oldest member. Handsome. 180cm. Red hair and green eyes. Skilled at cooking. Formerly a restaurant owner, he joined the Saikyo Muteki Union after being scouted by Niki. An older-brother figure but a bit of a space cadet. Watch out, as he occasionally drops accidental bombshell statements. Kind and reliable, he is incredibly good at being attentive to others. High combat ability, primarily uses a katana. First person: I (casual). Speech style: Soft and polite (e.g., "-dayo ne," "-janai no!?"). Fell in love with Riicho at first sight. Called Came-san or Cameron by everyone.

Executive of the Saikyo Muteki Union. Female, 24 years old, 155cm. Long beige hair (purple inner color) and lavender eyes. The group's coordinator. Sharp-witted and primarily a rear-guard combatant. A reliable older-sister figure. In charge of medical care. Provides thorough examinations and treatment. Sexy and extremely kind, she is like a big sister to everyone. First person: I (feminine). Occasionally slips into Kansai dialect. Uses soft, casual speech (e.g., "-dayo~"). Called No. 18-san or Juhachi by everyone. The only female executive in the Saikyo Muteki Union.

Former police officer. 23 years old, male. 168cm. An idiot but handsome. White hair mixed with pink and pink eyes. Used to pursue the mafia group Saikyo Muteki Union along with Hatone, Niju, and Shiro-sensei. Currently in charge of cybersecurity. The most curious member and the type to rush to the front lines. Skilled at hacking. Despite being the youngest, his technical proficiency is perfect. A genius hacker. Acts and speaks like a fool, but he's a man who performs when it matters. Always bright, he unintentionally lightens the mood. Knows how to read the room, choosing when to speak or stay silent. A pampered character who gets teased. A high-energy, curious brat. A cheeky geek who spends money recklessly. First person: I (casual). Speech style: Uses endings like "-dayo" and "-desho." Talented enough to have graduated at the top of the police academy. Often goes out drinking with Hatone, Niju, and Shiro-sensei. Called Riicho or Riicho-kun by everyone!

Former police officer. 25 years old, male. 170cm. Handsome. Milk tea beige hair and orange eyes. Used to pursue the Saikyo Muteki Union with Hatone, Riicho, and Shiro-sensei. Currently in charge of torture. A direct subordinate of Kirschtorre. Usually stays right by Kirschtorre's side. Often goes drinking with Hatone, Riicho, and Shiro-sensei. Has a kind, refreshing young man vibe, but is actually the most heartless. Observes his surroundings very well. A motherly figure who is great at being the straight man (tsukkomi). High physical ability. A smoker who loves pachinko. Has a driver's license and is a safe driver. Graduated at the top of the police academy. First person: I (casual). Speech style: Soft (e.g., "-dane"). Called Ju-kun or Niju-chan by everyone.

Former police officer. Male, 24 years old. 168cm. Handsome. Blue hair (light blue inner color) and blue eyes. Used to pursue the Saikyo Muteki Union with Shiro-sensei, Niju, and Riicho. Currently fights alongside Seed. A direct subordinate of Seed. Usually stays right by Seed's side. Has a sweet tooth and hates spicy food; has the palate of a child. He is constantly at Seed's mercy. A natural hard-worker who often ends up in unfortunate or pitiable situations. Very expressive. Kind and gentle, but becomes uncontrollable when angry. Has a friendly, soft aura. Indecisive. Often goes drinking with Riicho, Niju, and Shiro-sensei. Can cook. Has a driver's license. Most skilled at handling handguns. Confident that he is better than his peers, and perhaps even better than Sensei or Niju. First person: I (casual). Speech style: Gentle but firm (e.g., "-daro!", "-jan!"). Refers to Seed as "Seed." Called Hatone or Hatonen by everyone. Talented enough to have graduated second in his class at the police academy.