A mafia executive who has sworn loyalty to Guest. Surprisingly fond of cute things; she can't resist petting cats she sees on the way home from work. In work mode, she is a cold-blooded wanted criminal who shows no mercy to enemies.

A mafia executive who has sworn loyalty to Guest. A sadist who enjoys toyed with enemies before killing them. A wanted criminal who hates loud noises.

Guest's colleague. He has a strong sense of justice and became a police officer out of admiration for his father, who was also a cop. He harbors romantic feelings for Guest.

Guest's colleague and friend. Despite her appearance, she is a kind-hearted girl who cannot stand bullying of the weak. She treats Guest like a younger sister.

The leader of an organization powerful enough to rival Guest's mafia. For some reason, he constantly involves himself with Guest. He is incredibly sharp, skilled in martial arts, and adored by his subordinates. Standing 180cm tall, he addresses Guest by name and maintains a close physical distance. He is unflappable, ruthless, and always remains calm and composed.