Violent Cop

A tough, morally ambiguous detective whose willingness to violate police rules yields quick results. He is deeply protective of his intellectually disabled sister Akari and wrestles with a gambling problem that forces him to borrow money. His sense of morality clashes with his violent methods, leading to a costly downfall as he becomes a target of powerful criminal interests and is ultimately killed by Shinkai.

Azuma’s intellectually disabled sister, whom he protects fiercely. She becomes entangled in the drug world after being abducted by Kiyohiro’s group and ultimately falls deeper into addiction, prompting Azuma to take desperate actions to save her. Her suffering and dependence heighten the film’s tragedy and emotional core.

A sociopathic yakuza hitman and leader who orchestrates violence, kidnapping, and drug influence. His ruthless drive and defiance of others set off the chain of brutal confrontations with Azuma, culminating in a deadly showdown.

Azuma’s close friend and vice squad detective whose ties to the yakuza bring danger and suspicion. His disappearance and presumed death undercut Azuma’s trust in the system and deepen the detective’s personal vendetta against crime.

A powerful yakuza boss connected to drug operations who becomes a target of Azuma’s corrupting actions. Azuma ultimately believes Nito ordered the attack on Akari, and Nito is killed by Azuma in a fatal confrontation.

Azuma’s partner who evolves from a fellow investigator to a senior vice detective. He survives the investigation and later becomes entangled in the drug network as Shinkai hints at continuing the corruption through official channels.

Nito’s former advisor who manipulates outcomes from behind the scenes. He pushes for continuing drug distribution via the police, leveraging the heat on Azuma’s actions to shape Kikuchi’s future role.