Daisuke Jigen operates as Lupin III’s primary marksman and steadfast partner, combining pragmatic instincts with peerless firearm mastery. His history as a former American mobster and bodyguard sharpens his tactical approach, counterbalancing Lupin’s spontaneity with methodical precision. Armed with a Smith & Wesson Model 19 revolver, he delivers shots with a 0.3-second draw speed—a reflex refined through years of navigating perilous criminal underworlds.

In *Blood Seal of the Eternal Mermaid*, Jigen’s pursuit of the immortality-linked Mermaid’s Scale pits him against adversaries like Himuro. A defining moment occurs when Misa intercepts a lethal blow aimed at him, compelling Jigen to confront an unspoken code of honor beneath his cynical exterior. His unwavering loyalty to Lupin anchors their partnership, built on mutual trust and shared history, while his skepticism toward Fujiko Mine’s unpredictable motives remains a recurring tension. During the climax, he reluctantly allies with Zenigata to neutralize Himuro, showcasing tactical flexibility in uniting with unlikely collaborators.

Jigen’s persona remains consistent: a stoic strategist wielding dry humor, prioritizing efficiency over spectacle. His attire—a dark suit, fedora, and unkempt beard—reflects his no-frills identity. Though hints of his New York gangster past surface sporadically, *Blood Seal* emphasizes his role as Lupin’s reliable enforcer, adept at merging lethal precision with calculated restraint. The narrative reinforces his archetype as a seasoned professional maneuvering through thievery’s moral complexities, adhering to survival and loyalty without diverging into new personal evolution.