Daisuke Jigen is a highly skilled gunman and the primary partner of Arsène Lupin III. His background features a complex history across various adaptations. In the original manga, Jigen first appeared as a hitman hired to eliminate Lupin; after his attempt failed, their dynamic shifted from rivalry to partnership. The manga notes he had a sister and a brother who were killed by a man named Kido. Alternative anime backstories offer different origins. One version states he was born in the Bronx, New York, joined the mob at a young age, and was trained by a figure named Joe of Spades. He later worked as a mercenary in South America before moving to Europe and joining the Italian mob. There, he became involved with his boss's wife, Cicciolina. After the boss was accidentally killed, Jigen took the blame and inherited the boss's gun, which became his signature Smith & Wesson Model 19 revolver. A later meeting with Cicciolina, arranged by Fujiko Mine, ended with Jigen shooting her, only to learn she had orchestrated her own death. This event influenced his transition from gunman to thief. Another narrative from *The Woman Called Fujiko Mine* depicts their first meeting inside a pyramid, where they initially tried to kill each other before cooperating to escape and agreeing to a future duel. Their partnership solidified when Lupin saved Jigen from the police, with a suggestion they knew each other from childhood. Jigen possesses exceptional marksmanship, capable of a 0.3-second quick-draw with superhuman accuracy. His skills include shooting skeet with a handgun, detonating missiles by targeting the warhead, and deflecting bullets in mid-flight. He is proficient with a wide array of firearms but favors his Smith & Wesson Model 19 revolver. Beyond firearms, he is adept in hand-to-hand combat, capable of knocking out an attacker with a single blow, and skilled in operating various motorized vehicles, including planes and tanks. His personality is pragmatic and cynical, often serving as the voice of reason. He has a quick temper and responds with violence to insults from both enemies and friends. Despite a gruff exterior, he displays an ironic sense of humor and demonstrates loyalty to Lupin, though he remains consistently distrustful of Fujiko Mine. He is the least apprehensive within the group about taking human life but considers killing women and children a personal taboo. Jigen's appearance is defined by his trademark broad-brimmed fedora, which almost always obscures his eyes, and a short chin curtain beard. His wardrobe is minimalist, typically consisting of a dark-colored business suit, a light-colored dress shirt, a black tie, and lace-up or Chelsea boots. The hat is one of his most prized possessions, second only to his firearms. His hobbies and habits include smoking cigarettes, with a preference for brands like Pall Mall or Marlboro, drinking Scotch and bourbon, target practice, visiting bars, playing poker, watching boxing matches, and eating American food. He has a noted resistance to intoxication. The prequel series *Lupin Zero* suggests that Lupin and Jigen knew each other as children in 1960s Japan, with Jigen already demonstrating advanced marksmanship skills.