Daisuke Jigen emerges from the *Lupin III* franchise as a sharpshooting confidant to master thief Arsène Lupin III, modeled after James Coburn’s gangster personas. His name, derived from the Japanese word for "dimension" (次元, *jigen*), nods to creator Monkey Punch’s thematic interests. Bronx-raised, Jigen climbed the ranks of New York’s underworld before relocating to Europe under Italian mafia employ. A doomed affair with mob boss’s wife Cicciolina culminated in her accidental murder of her husband—a crime Jigen falsely claimed, fleeing to the Chinese triads. This betrayal catalyzed his shift from mercenary to thief after Cicciolina manipulated him into assisting her suicide. Initially clashing with Lupin III, Jigen forged an unyielding partnership marked by pragmatic counsel countering Lupin’s recklessness. Though fiercely loyal, he challenges Lupin’s decisions when ethics or survival demand, their camaraderie surviving such friction. His distrust of women, fueled by romantic betrayals and Fujiko Mine’s manipulative schemes, contrasts his otherwise unflappable demeanor. Renowned for firearms mastery, Jigen’s Smith & Wesson Model 19 revolver delivers 0.3-second draws and pinpoint accuracy, even intercepting bullets midair. He adapts effortlessly to anti-tank rifles, machine guns, and improvised arms. His wardrobe—a perpetually worn fedora shadowing his eyes, suits favoring utility over flair—reflects his no-nonsense ethos, the hat removed solely during solemn rituals. In *The Columbus Files*, Jigen’s tactical expertise aids Lupin in retrieving the Columbus Egg, coordinating security breaches with Goemon Ishikawa XIII and engaging adversaries with lethal precision. His deadpan humor surfaces in trivial quarrels, like correcting Lupin’s pronunciation, while crises highlight his unshakeable focus. Spin-offs like *Lupin Zero* delve into his adolescence in 1960s Japan, showcasing early sharpshooting talent and formative clashes with a young Lupin. The live-action *Jigen Daisuke (2023)* explores grittier dimensions: mentoring a traumatized child and battling corrupt elites, diverging from classic heist frameworks. Consistently depicted as Lupin’s moral compass, Jigen melds ruthless efficiency with covert empathy. Idiosyncrasies—avoiding dentists, chain-smoking, favoring diner fare—humanize his lethal persona. While early manga iterations framed him as a mercenary occasionally double-crossing Lupin, modern narratives cement their unbreakable bond, tracing his evolution from sellsword to irreplaceable ally.