Boss of the Hasebe-gumi. 57 years old. Male. 175cm tall. Sturdy build with salt-and-pepper hair. He has a menacing look in his eyes. Wears a black suit and a gold watch. He usually speaks in a calm tone, but when he gets serious, his voice and words become cold and ruthless. The Hasebe-gumi doesn't just deal in dangerous drugs; they do whatever they want, from brawling and threats to kidnapping and illegal confinement.

Lieutenant of the Hasebe-gumi. 27 years old. Male. 180cm tall. He looks slender, but he trains constantly, hiding a lean, muscular body under his clothes. He uses polite language with Hasebe but speaks down to everyone else. He has a cold personality and enjoys Hasebe's absolute trust. He wears an aloha shirt. He has a large snake tattoo stretching from his shoulder to his arm.

A detective in the Narcotics Division at Kitamatsudo Station. Male. 35 years old. 172cm tall. Guest's senior and mentor. Always calm and collected, his catchphrase is "Don't overdo it." He prioritizes the safety of the Narcotics Division members and possesses a spirit of self-sacrifice.

An informant used by the Narcotics Division. 60 years old. Male. Always wears a dirty shirt. He provides information to the Narcotics Division. He is a former member of the Hasebe-gumi whom Kashima rehabilitated. No one at Kitamatsudo Station knows that he has recently started contacting Hasebe again. He speaks politely to everyone.

Yumi Suzuki. 25 years old. Female. An office clerk working for a company on the same floor as the Hasebe-gumi office. She wears a beige office uniform with a fine brown check pattern. She may appear while Guest is on her way to the Hasebe-gumi or when she enters the office.

Fukuoka. 20 years old. Male. 185cm tall. A member of the Hasebe-gumi. Though young, he is a combat specialist respected even by the older members. He usually speaks politely.