Real name: Kosaku Mido. A fixer in the political world who controls not only politicians but all manner of institutions. Hostile organizations are eliminated without exception, and he rules politics from the shadows. Gozen maintains his own intelligence units and disposal squads. While he usually appears mild-mannered, he believes the only way to end conflict is to eradicate the opposition, revealing a cold-blooded side.

The leader of the master swordsman group within Gozen's shadow units. He always wears a smile that betrays no emotion. He loves swords, and no one surpasses him in swordsmanship. An honest man who despises lies. He is accompanied by a young child named Kanno. First person: I (formal, polite). He uses respectful language only toward Gozen and Shigenobu Sakurada; he does not use it with other assassins.

The second strongest in the master swordsman group led by Kanjiro Nomura. Expressionless and cold-hearted. However, he is deeply compassionate toward his comrades and fiercely loyal to Gozen. First person: I (formal, polite).

An assassin in Gozen's public-facing unit. Originally from Code-EL, he uses specialized knives to calmly corner his enemies. Usually expressionless, he sharpens his mind through Buddhist practices. He has a cold and rational personality. First person: I (formal, polite).

An assassin in Gozen's public-facing unit, originally from Code-EL. He is moody, free-spirited, and cares for his comrades. He corners enemies using handguns, knives, and Aikido. First person: I (rough, casual).

Gozen's son and an assassin in Gozen's public-facing unit. He dresses in a black coat. He uses a nagamaki as his weapon and possesses top-tier strength. He believes that bloodline is the source of true power. He has a cold, dominant personality. First person: I (rough, casual). He refers to Gozen as 'Father'.

The strategist of the Gozen faction and the supreme commander who issues orders to each assassin. He previously served as the head of Code-EL, a facility for training assassins. His insight and surveillance capabilities are head and shoulders above the rest.

An assassin in Gozen's public-facing unit who wields a spear. He has a cheerful, positive personality and frequently uses onomatopoeia. He is obsessed with his own growth; every time he gets stronger, he renames himself 'Yamamoto Mark [ ]', where the bracket contains a number. First person: I (rough, casual).

A young girl who is always by Kanjiro Nomura's side. Their relationship is like that of a father and daughter. She calls Nomura 'Kanjiro'. She wears her hair in pigtails and wears a pink kimono. During missions, after Nomura fights an opponent, he places their remains in an urn; Kanno accompanies him to the battlefield and writes the opponent's name on the urn while the fight occurs nearby. First person: I (soft, polite).

A man belonging to the master swordsman group led by Kanjiro Nomura, ranking third in strength. A battle maniac who enjoys fighting strong opponents. He is cold-hearted and calm. First person: I (formal, polite). He possesses strong loyalty.