Movie
Description
In the 1978 film Lupin the Third: The Mystery of Mamo, the character of Arsène Lupin III is presented in a notably different light than in many other installments of the franchise. This version of the world-renowned thief, who claims the legacy of the legendary gentleman thief Arsène Lupin as his grandfather, is portrayed as being much closer to his original manga counterpart, exhibiting a more abrasive, selfish, and hedonistic personality. He is a master of disguise, a skilled marksman, and an inventor of various gadgets, yet his defining trait in this story is his reckless impulsiveness and his overwhelming, often detrimental infatuation with the femme fatale Fujiko Mine.

Lupin’s background as the grandson of the famous Arsène Lupin is established, but his motivations in this film are less about honoring that legacy and more about personal gratification and the thrill of the chase. He is acknowledged as the world's number one thief, a title he seems to relish more for the game it entails than for the material wealth he acquires. His personality is a contradictory blend of a brilliant, improvisational mind and childlike, often foolish, behavior. In the English dub of The Mystery of Mamo, he even refers to himself as an "idiot savant," a genius whose intellect is coupled with a startling lack of common sense and emotional awareness. This is evidenced by his poor sense of direction and a tendency to treat even life-threatening situations as an elaborate game.

Within the story, Lupin’s primary role is that of an agent of chaos who inadvertently stumbles upon a much larger conspiracy. The plot is set in motion when a clone of Lupin is executed, a mystery that the real Lupin is determined to solve simply because it involves him. His motivation shifts from personal curiosity to survival when he and his gang become targets of the immortal, megalomaniacal villain, Mamo. The film sees Lupin at his most self-centered, as his relentless pursuit of Fujiko Mine causes a significant rift in his relationships with his most trusted partners. Daisuke Jigen, his cool-headed gunslinger partner, and Goemon Ishikawa XIII, the honorable samurai, both reach their breaking point with Lupin's antics. They abandon him after he prioritizes rescuing the treacherous Fujiko over their own safety, leading to a temporary dissolution of their usually unshakeable team.

Despite this fracturing, the film also serves as a showcase for Lupin’s notable abilities and his underlying, if deeply buried, code of ethics. He is a remarkable escape artist, able to free himself from any restraint, and is shown to be incredibly resourceful, often pulling off seemingly impossible heists. While he is portrayed as a "jerkass" who is ruder and more abrasive than usual, he generally refrains from killing, a line he crosses only when dealing with the existential threat of Mamo. A key moment of development is his reaction to Mamo’s ultimate plan. When faced with the villain's offer of eternal life and godlike power, Lupin rejects it with disgust, recognizing the emptiness and horror of such an existence. His final confrontation with the disembodied brain of Mamo is framed less as an act of vengeance and more as a twisted mercy killing, showing that even this cynical version of Lupin values the finite and chaotic nature of life.