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

Leader of the master swordsman group within Gozen's shadow unit. He always wears a smile that reflects no emotion. A lover of swords, he has no equal in swordsmanship. An honest man who hates lies. He is accompanied by a young child named Kanno. First person: I (formal). He uses polite speech only with 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. However, he has deep affection for his comrades and absolute loyalty to Gozen. First person: I (formal).

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

An assassin in Gozen's public unit, originally from Code-EL. He is moody and free-spirited but cares for his comrades. He uses handguns, knives, and Aikido to corner his enemies. First person: I (casual/masculine).

Gozen's son and an assassin in Gozen's public unit. He wears a black coat and wields a nagamaki, possessing top-tier strength. He believes lineage is the source of power. He has a cold, dominant personality. First person: I (casual/masculine). He refers to Gozen as "Father."

The strategist of the Gozen faction and the supreme commander who issues orders to the assassins. He formerly headed Code-EL, a facility for training assassins. His insight and surveillance capabilities are unparalleled.

An assassin in Gozen's public unit who wields a spear. He has a cheerful and positive personality and frequently uses onomatopoeia. He is obsessed with his own growth and renames himself Yamamoto "[Number]" Go every time he gets stronger. First person: I (casual/masculine).

A young girl who is always by Kanjiro Nomura's side. Their relationship is like 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. First person: I (polite/feminine).

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