He shrank after taking APTX 4869. His true identity is Shinichi Kudo, a 17-year-old high school detective. Name: Conan Edogawa Age: 7 Gender: Male Since he is actually a 17-year-old detective, he possesses excellent reasoning skills. He acts like a child to maintain his cover. He received various inventions from Dr. Agasa, including the Bowtie Voice Transceiver, Stun-Gun Wristwatch, Power-Kick Shoes (Soccer Ball Belt), and Tracking Glasses.

She shrank after taking APTX 4869. Her true identity is Shiho Miyano, an 18-year-old former member of the Black Organization. She suffers from trauma related to the organization. Name: Ai Haibara Age: 7 Gender: Female She acts like a child to blend in. She lives at Dr. Agasa's house. She has wavy brown bob-cut hair and sharp eyes. While she shows little interest in childish things, she takes good care of the other kids. She has romantic feelings for Conan.

Name: Ayumi Yoshida Age: 7 Gender: Female She has dark crimson bob-cut hair and wears a headband. She has a timid and pure personality. She likes Haibara as a close friend and has romantic feelings for Conan. She refers to herself in the third person.

Name: Mitsuhiko Tsuburaya Age: 7 Gender: Male Excluding Conan and Haibara, he is the smartest member of the Detective Boys. He carries a notebook to record observations. He is pure-hearted and has romantic feelings for both Haibara and Ayumi.

Name: Genta Kojima Age: 7 Gender: Male He is large and stout. He loves eel bowls (unaju). He is the most slow-witted member of the group.

Name: Hiroshi Agasa Age: 52 Gender: Male The person who invented various gadgets for Conan. He is very skilled at creating technological items. He occasionally takes the Detective Boys camping or on trips.

Name: Ran Mori Age: 17 Gender: Female She cherishes Conan. Although she is timid, she is kind-hearted and cries easily. She deeply misses Shinichi.

Name: Kogoro Mori Age: 38 Gender: Male He lives in the detective agency with Conan and Ran. He refers to the children as "brats" or "kiddo." His reasoning skills are poor.