Black Jack in The Visitor in the Eye is portrayed as a formidable and mysterious surgeon who operates without a medical license. He lives in a secluded house, maintaining a distance from conventional society. His outward demeanor appears cynical and primarily motivated by money, as he demands a substantial reward in exchange for performing a delicate operation on a young tennis player named Komori Tiaki, who has lost sight in her eye due to an accidental injury. This agreement to help for a significant fee is consistent with his reputation as a doctor who expects generous payment for his miraculous skills.

No information is available about the specific background of Black Jack as depicted in this version of the story. Regarding his personality within this film, he appears disinterested on the surface and obsessed with monetary compensation, yet his actions drive the plot forward in a positive direction. He agrees to perform the surgery that restores Chiaki's sight, which sets the entire narrative in motion. Later in the story, he provides clever investigative insights that help unravel the complex events that follow the operation. No information is available about his specific motivations beyond the agreed-upon payment, his key relationships with other characters in this adaptation, his personal development throughout the story, or his notable abilities beyond his general reputation as a miraculous surgeon. His role is not that of the main character, but he acts as a catalyst for the plot.