ONA
Description
In the 2022 original net anime Lupin Zero, which depicts the childhood of the famous thief in 1960s Japan, Daisuke Jigen is introduced as a young man whose hardened, world-weary demeanor is already firmly in place. His background is steeped in a life of criminality from a very early age. He was raised by a father who regularly took him to battlefields and was involved in various underworld transactions, an upbringing that instilled in him a profound sense of pragmatism and self-reliance. By the time he is a teenager, Jigen has already mastered the use of firearms, started smoking, and developed a distinct preference for revolvers. He is nominally a student at the same school as a young Arsène Lupin III, but he is almost always absent, choosing instead to spend his time on underground work such as delivering guns and providing security for jewelry transports. This work has already earned him a reputation for his skill and professionalism beyond his years.

The personality of young Jigen is remarkably similar to his adult counterpart: cynical, pragmatic, and taciturn. He acts as a grounding presence, a stark contrast to the more impulsive and fantastical nature of his new acquaintance, Lupin. He is not easily impressed and frequently dismisses Lupin's antics with a weary sense of realism. His motivations at this stage are not driven by grand ambition but by a simple need to survive and operate within the criminal world he already knows. He repeatedly tells Lupin to go home and enjoy the comfortable life of a rich boy, seeing their worlds as fundamentally incompatible. However, his actions reveal a deep-seated loyalty that begins to form despite his protests. He does not blindly follow anyone, including Lupin, and retains his independent judgment, a trait that defines his role in their future partnership.

His role in the story is as the initial reluctant partner and eventual close friend to the young Lupin. Their dynamic is set into motion when Lupin, fascinated by Jigen's mysterious and competent nature, begins to actively seek him out. A pivotal early event involves the two escaping from a nightclub alongside a singer named Yoko, after which Lupin becomes more insistent on being part of Jigen's life. This relationship solidifies when they work together to rescue Yoko after she is kidnapped, forcing Jigen to acknowledge the value of Lupin’s unique brand of cleverness and courage. Through a series of misadventures, the initially reluctant Jigen begins to enjoy Lupin's company and even participates in schemes, such as building a secret base at their school. This relationship is the central axis of his character in Lupin Zero, showing the first sparks of the legendary partnership that will define both of their lives.

Jigen's key relationship is exclusively with young Lupin. The narrative focuses on how their bond is forged, with Jigen serving as the straight man to Lupin's trickster energy. While other characters like the singer Yoko and Lupin's family appear, Jigen's development is almost entirely tied to his growing, if unspoken, trust in Lupin. His development throughout the six-episode series is subtle but significant. He transitions from a lone wolf operating in the shadows, reluctantly tolerating a persistent rich boy, to a willing accomplice who has found a sense of camaraderie and purpose he did not previously have. He begins to see Lupin not as a nuisance, but as an equal partner with a shared future.

Even at this young age, Jigen's notable abilities are already highly developed. He is an exceptionally skilled marksman, having mastered guns from a very young age. His visual design is already iconic; he wears a broad-brimmed fedora that conceals his eyes and refuses to wear a school uniform, setting him apart from his peers and signaling his life outside the bounds of normal society. This depiction in Lupin Zero serves as an origin point, showing that the core elements of Jigen—his skill, his cynicism, his loyalty, and his iconic look—were not acquired in adulthood but were forged in a harsh and lonely childhood, awaiting the arrival of the one person who could break through his hardened exterior.
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