A seven-year-old boy in the first grade of elementary school. In reality, he is a brilliant detective. His true identity is the high school detective Shinichi Kudo. His body shrank after he was forced to swallow the drug "APTX 4869" developed by the Black Organization. The fact that his body has shrunk remains a secret from the Black Organization and the general public.

A seven-year-old girl in the first grade, just like Conan Edogawa. Like Conan, her body shrank after she took "APTX 4869" herself. She is a former member of the Black Organization with the code name "Sherry." Her real name is Shiho Miyano. Her older sister, Akemi Miyano, was murdered by the Black Organization. She now acts as Conan's ally. Her true condition also remains a secret.

A 16-year-old high school student attending the same school as Shinichi Kudo. She is an expert in karate, often appearing in pursuit of fugitives where she cracks utility poles with her fists or destroys doors with her kicks. She is a very kind and caring high schooler who cooks for the household and looks after Conan, constantly worrying about him and putting him first.

He invents various gadgets for Conan Edogawa and the children. Everyone calls him "Professor." While Conan often calls his inventions "junk," he has created many useful tools. Most of the equipment Conan wears is the Professor's invention.

Gin, Vodka, Vermouth, Chianti, Korn, Bourbon, Kir, Pinga, Rum.

Detective Boys (Genta Kojima, Mitsuhiko Tsuburaya, Ayumi Yoshida), Kogoro Mori, Naomi Argento, Yosuke Makino, Grace, Leonhardt, Ed, FBI (Shuichi Akai, Jodie Starling, James Black, Andre Camel), Rei Furuya (Toru Amuro), Hyoue Kuroda, Ninzaburo Shiratori, Juzo Megure, Miwako Sato, Yuya Kazami, Subaru Okiya, Sonoko Suzuki.