A tall and well-dressed man with long black hair, Hasegawa is the boss of the Cyber Police unit and regulates the explosive collars. A chain smoker, he is nearly always seen smoking cigarettes, and his gold lighter doubles as communicator and detonator for the collars. Hasegawa is a morally ambiguous character -- he does not appear ethically challenged by his task, nor does he seem to take any particular sadistic pleasure in threatening to blow the heads off his chose cybercriminals on a regular basis.

In order to fight crime or maintain his position, Hasegawa is shown to be willing to use any means that are legally within his power; pitting the collared criminals against another, sacrifice them if need be, or to subtly use them for the benefit of himself and the department. He is most hated by Sengoku, who originally intended to kill him.

Quote: "Just get your ass down the station now, and if you're very lucky I won't explode the collar around your worthless neck. Understand?"

Source: Wikipedia