Daisuke Jigen is a professional marksman and thief defined by his unwavering loyalty to Lupin III, despite frequently disapproving of Lupin's undisciplined behavior with women. His appearance draws inspiration from American gangsters, particularly James Coburn's role in *The Magnificent Seven*, and his name originates from the Japanese phrase "jigen daisuki" ("I love dimensions"). Initially portrayed in early manga as a cynical hitman who occasionally betrayed Lupin for profit, their first encounter involved Jigen being hired to assassinate Lupin, with neither succeeding. Their partnership solidified when Jigen, forced to target Lupin under duress, was spared after Lupin revealed he had already neutralized the threat against Jigen's sister. Later manga and anime adaptations firmly established him as Lupin's steadfast right-hand man. Anime backstories depict him as a Bronx native who joined the New York mob in his youth before relocating to Europe and affiliating with the Italian mafia. A romantic involvement with his boss's wife, Cicciolina, led to her accidentally killing her husband. Jigen took the blame to protect her and acquired her gun, which became his signature weapon. Cicciolina later committed suicide using Jigen's gun, prompting him to abandon killing and transition solely into theft. This traumatic history fostered his chronic distrust of women, particularly Fujiko Mine. Jigen possesses a 0.3-second quick-draw and near-superhuman accuracy, enabling feats like shooting missiles mid-flight or deflecting bullets. He favors a Smith & Wesson Model 19 revolver for its reliability and often uses his trademark fedora for aiming, though he maintains proficiency without it. His marksmanship extends to sniper rifles, machine guns, and anti-tank weaponry. He is also adept in hand-to-hand combat, vehicle piloting, and disguises. Personality-wise, he balances Lupin's impulsiveness as a pragmatic "big brother" figure. Despite his gruff exterior and quick temper, he exhibits ironic humor and deep commitment to the team. Recurring traits include chain-smoking (60 cigarettes daily), avoiding dentists despite chronic toothaches, and preferences for American cuisine, spaghetti westerns, and classical music. In *Lupin Sansei: Lupin Ikka Seizoroi*, Jigen attends a reunion at Lupin's island villa after five years. He grows suspicious of Lupin's unusual behavior, investigates a man chained in an iron mask, and this leads to a fatal confrontation with Goemon due to misunderstandings. His relationships encompass deep loyalty to Lupin, mutual respect with Goemon Ishikawa XIII despite occasional clashes, and antagonism toward Fujiko. His romantic life remains tragic, with figures like Karen Korinsky and Cicciolina meeting fatal ends.