James Black, a high-ranking FBI agent leading operations against the Karasuma Group in Japan, was born in London's Marylebone district before relocating to Chicago and becoming a naturalized American citizen. His history includes an encounter during an animal show visit to Japan, where Conan Edogawa, Professor Agasa, and the Detective Boys rescued him after a mistaken celebrity identity led to his kidnapping. This incident earned James's deep respect; he nicknamed Conan "Cool Guy" and later deduced his true identity as Shinichi Kudo. He maintains a stoic, collected demeanor and trusts subordinates like Jodie Starling and Shuichi Akai, deferring to their expertise and valuing Conan's insights during joint investigations. His relationship with Jodie is paternal, rooted in a promise to her deceased father; he persistently urged her into the Witness Protection Program for safety, eventually agreeing to her condition of an FBI position upon adulthood. With Akai, James exhibits unwavering trust despite Akai's independent operations and was privy to his faked death plan. He also correctly identifies Akai's sister, Masumi Sera, as female amid others' misidentification, though denies prior acquaintance. In *Lupin III vs. Detective Conan: The Movie*, James investigates the Cherry Sapphire theft orchestrated by Lupin III under coercion from antagonist Alan Smithee. He coordinates with Tokyo police Inspector Megure and Interpol's Inspector Zenigata, supporting the pursuit while Lupin's team and Conan confront Smithee and Italian mafia figure Luciano Carnevale over Vespanian ore—a mineral enabling advanced stealth technology. Non-canon portrayals include his appearances in films like *Dimensional Sniper*, *The Darkest Nightmare*, *The Scarlet Bullet*, and *Black Iron Submarine*, without specific plot roles detailed. He notably admires Fujiko Mine, Lupin III's associate, during crossovers. Trivia notes his namesake inspiration from fictional spies James Bond and James Moriarty. He drives a white Mercedes-Benz CLK320, and his hair color transitioned from blond in initial appearances to silver from Episode 425 onward. He is right-handed.