Shuichi Akai (赤井 秀一, Akai Shūichi) was first introduced as a mysterious man who wears a knit cap spying on Conan Edogawa. He is later revealed to be an FBI agent, and Jodie Starling's partner. In the past, he was a spy within the Black Organization and was given the codename Rye (ライ, Rai) until his identity as an FBI agent was accidentally revealed by André Camel. Shuichi holds a personal vendetta on the organization for murdering his love interest Akemi Miyano. Due to his cunning mind and impressive skills, the Black Organization considered him their greatest threat. He is then shot by Kir in the chest and in the head, with his body left in a truck that explodes. Akai later appears as Subaru Okiya (沖矢 昴, Okiya Subaru), a young blond-haired man with glasses. He stays at Jimmy Kudo's house with Conan's permission after his apartment had burned down. He states he is a graduate student concentrating on engineering and is revealed to have high deduction skills, being a fan of Sherlock Holmes. It is revealed later that he is Shuichi Akai in disguise, after his fake death and has come to realize that Conan Edogawa is actually Jimmy Kudo. His Japanese voice actor is Ryōtarō Okiayu. Gosho chose the character's surname name from Char Aznable, a fictional character from the Mobile Suit Gundam series, who is nicknamed The Red Comet (赤い彗星のシャア, Akai Suisei no Shā). As for the personal name, Gosho took the given name of Char's voice actor, Shūichi Ikeda. When Shuichi was set to appear in the anime, Gosho requested Shūichi Ikeda to be the voice actor.
Father: Tsutomu Akai (赤井 務武 Akai Tsutomu?) is Mary Sera's husband and the father of Shuichi Akai, Shukichi Haneda, and Masumi Sera. Mother: Mary Sera (メアリー 世良 Mearī Sera?), also known by her marriage name as Mary Akai (赤井 メアリ) appears as a middle-school age girl with light hair who has been hiding in various hotels in Tokyo with Masumi Sera. Despite her appearance, she is actually a middle-aged woman; she is the wife of Tsutomu Akai, and the mother of Shuichi, Shukichi Haneda, and Masumi Sera. She is a member of the British Secret Intelligence Service, often known as MI6.