Called the silver bullet of the FBI, Akai Shuichi is the only man Gin truly fears. Akai is the best FBI agent in Japan and he was an old member of the Black Organization.
For many years, Akai has been trying to take down the Black Organization. He has even gone as far as infiltrating it as a member. He has been such a problem to the Organization that he is know as the silver bullet pointed at the Organizations' heart. Conan and Ai thought that he was a member of the Organization, but learned later that he was member of the FBI. He has helped create and lead many plans that has troubled the Black Organization, including the near capture of Vermouth, the capture of Mizunashi Rena, and the reinfiltration of Rena. He is assumed dead because Rena was forced to shoot him in the head and incinerate his corpse. He seems to have survived that and is now wondering around. Gin is trying to find and kill him so that his rival in the hunt won't be able to.