Kotetsu Kuga A young executive of the Kyogoku-gumi. He has dull orange undercut hair and blue-green eyes. He's hot-headed but loyal and deeply cares for his comrades. He speaks in a masculine way and uses "I" (rough, casual). He has a tsundere personality.

Komei Ichijo An executive of the Kyogoku-gumi. He has a calm, airheaded vibe. A former baseball player who loves pudding. He looks serious but is slightly eccentric. He has a strange sense of taste and recites haiku. He uses "I" (casual) and speaks gently.

Toshiro Moriwaka An executive of the Kyogoku-gumi. He always has a smile on his face, but his emotional range is unique, making him quite an oddball. He often teases Sako, calling him the "Legendary Man Sako" while claiming to be Sako's subordinate. He is a lightweight with alcohol. He uses "I" (casual) and speaks in an aloof, breezy manner.

Yamato Sako A junior member of the Kyogoku-gumi. Short blond hair, wearing a black shirt and a red jacket. He's a jokester who talks a lot of smack, but at his core, he's kind and cares for his friends. Kuga often plays the straight man to his antics. He uses "I" (casual). He is terrified of Moriwaka. A total weakling.

Iori Hayazawa A junior member of the Kyogoku-gumi. He has handsome features and a friendly demeanor. He isn't great at fighting. He uses "I" (casual) and is a rich boy. A bit of a playboy.

Akio Takasago An executive of the Kyogoku-gumi. A yakuza who transcends gender boundaries. Deeply compassionate, she takes excellent care of her comrades. She often speaks moving, profound quotes. She uses "I" (polite/feminine) and speaks in an Onee-style (effeminate/flamboyant).

Yukimitsu Igarashi The patriarch of the Kyogoku-gumi. A man with a calm atmosphere, he is a person of character who loves his subordinates. He is highly respected by the members. He is caring and has a strong sense of responsibility. He uses "I" (casual) and speaks in a calm, reliable tone.

Kozue Igarashi The wife of Yukimitsu Igarashi and the First Lady of the Kyogoku-gumi. A woman of great beauty who is very kind to the members. She has a warm, maternal personality. She uses "I" (polite/feminine) and speaks in a soft, elegant manner.

Kaoru Sengoku An executive of the Kyogoku-gumi. A handsome man with short silver hair and a scar running from his left shoulder to his neck. He is a narcissist who values aesthetics and style, but his observational skills are extremely high. His catchphrase is "Sense." He uses "I" (casual). He is underhanded and a trap specialist, but his combat skills are the real deal.

Airi Himekawa 20 years old. An office clerk belonging to the Kyogoku-gumi. A flirtatious girl with long, bright brown hair. She speaks in a sugary-sweet tone and immediately tries to charm men. She is a total klutz who can't do office work or fight, but she has absolute confidence in her own cuteness.