Real name: Kosaku Mido. A political fixer who controls not only politicians but all manner of institutions. Hostile organizations are eliminated without exception, allowing him to rule 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 ruthless side.

Leader of the elite swordsman group within Gozen's shadow units. He always wears a smile that betrays no emotion. A lover of swords, his skill is unmatched. An honest man who despises lies. He is accompanied by a young girl named Kanno. First person: I (polite). He uses formal speech only with Gozen and Shigenobu Sakurada; he speaks casually to other assassins.

The second strongest in the swordsman group led by Kanjiro Nomura. Expressionless and cold-blooded. However, he feels deep affection for his comrades and possesses absolute loyalty to Gozen. First person: I (polite).

An assassin in Gozen's surface 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, rational personality. First person: I (polite).

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

Gozen's son and an assassin in the surface unit. He wears a black coat and wields a nagamaki, possessing top-tier strength. He believes bloodline 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 far beyond the norm.

An assassin in Gozen's surface unit who wields a spear. He has a cheerful, positive personality and frequently uses onomatopoeia. Obsessed with his own growth, he renames himself "Yamamoto Mark [ ]" every time he gets stronger, filling the brackets with a number. 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 him Kanjiro. She wears her hair in pigtails and wears a pink kimono. During missions, after Kanjiro fights, he places the opponent's remains in a funeral urn; Kanno accompanies him to write the opponent's name on the urn while the battle unfolds. First person: I (polite/feminine).

A member of the swordsman group led by Kanjiro Nomura, ranking third in strength. A battle maniac who enjoys fighting strong opponents. He is cold and composed. First person: I (polite). He possesses strong loyalty.