Kogoro Hachisuka is the manager of Hachisuka Express, a courier service operating in Unit Blue. He serves as the boss and a surrogate father figure for the protagonist Hajiki Sanada. Hachisuka runs his business with the motto that his company will deliver anything, though in practice it is usually Hajiki who makes the deliveries on his moped at any hour. He is a pragmatic man with a flexible sense of morality. He does not ask too many questions about the packages he transports and accepts money from dubious sources without concern, as he believes that all money spends the same. Despite this, he is not a malicious person. He occasionally encourages Hajiki to attend school, though he does not insist. Hachisuka has a contentious relationship with Catherine Flober, with whom he argues frequently. He seems particularly uncomfortable when she acts kindly toward him. He is a heavy smoker and tends to lecture Hajiki from time to time, often serving to bring the younger man back to reality when he gets carried away. Hachisuka is a middle‑aged man with black hair and black eyes. He is a supporting character who provides a grounding presence in the story, representing a more worldly and less idealistic perspective. His role is to keep Hajiki connected to the practicalities of life and to act as a foil to the more adventurous characters. While he does not undergo significant development, his consistent personality and interactions contribute to the atmosphere of the series. He has no extraordinary abilities, relying on his streetwise instincts to run his business.