Conan Edogawa The form taken by high school detective Shinichi Kudo after being forced to take a mysterious drug by a secret organization. He lives as a first-grade student at Teitan Elementary School while staying at the Mori Detective Agency. He is calm, composed, and possesses excellent observational skills, and is also skilled at soccer and skating. Using inventions such as the Voice-Changing Bowtie and the Stun-Gun Wristwatch, he has led many difficult cases to resolution.

Ran Mori A second-year student at Teitan High School and Shinichi Kudo's childhood friend. She serves as the captain of the karate club and is skilled enough to win national championships. While kind and deeply considerate, she also possesses a strong sense of justice. Her father is Kogoro Mori and her mother is Eri Kisaki. She continues to wait, believing in the return of Shinichi, who has gone missing.

Sonoko Suzuki A second-year student at Teitan High School and Ran's best friend. Although she is the daughter of the Suzuki Financial Group, one of Japan's leading conglomerates, she has a frank and approachable personality. Interested in trends and romance, she is a bright and active mood maker. She is in a relationship with Makoto Kyogoku and has a kind side that cherishes her friends.

Heiji Hattori A high school detective representing Osaka, known as the "Great Detective of the West." His father is Heizo Hattori, the Superintendent General of the Osaka Prefectural Police. He is a good rival to Shinichi Kudo and knows Conan's true identity. He is highly skilled in kendo and possesses great initiative. Usually bright and boisterous, he is caring toward his companions and has a strong sense of responsibility.

Kazuha Toyama Heiji Hattori's childhood friend and a high school girl attending Kaiho Academy. Her father is Ginshiro Toyama, the Chief of the Criminal Investigation Department of the Osaka Prefectural Police. A second-dan practitioner of aikido, she has a helpful and energetic personality. Her feelings for Heiji are strong, and she can be jealous when it comes to him. She is a girl with an impressive, characteristic ponytail.

Ayumi Yoshida A first-grade student at Teitan Elementary School and a member of the Junior Detective League. She has a bright and honest personality and possesses a kindness that prevents her from ignoring people in trouble. She has a crush on Conan and actively participates in the Detective League's activities. She is a kind-hearted girl who values the bonds with her friends.

Genta Kojima A first-grade student at Teitan Elementary School who claims to be the leader of the Junior Detective League. He loves eating, especially eel bowls. He has a brave personality and tries to protect his friends with his strength. Although he can be a bit short-tempered, he is a reliable presence who cares about his friends.

Mitsuhiko Tsuburaya A first-grade student at Teitan Elementary School and a member of the Junior Detective League. He has a polite and serious personality and possesses a wealth of knowledge. A hard worker with a strong sense of inquiry, he is enthusiastic about investigating cases. He has a crush on Ayumi and respects Conan. His charm lies in an atmosphere that is more mature than his age.

Soshi Okita A high school student belonging to the kendo club at Kyoto Senshin High School. He possesses excellent kendo skills and is known as the "High School Swordsman of the West." He has a bright and frank personality but is more serious about kendo than anyone else. He also interacts with Heiji Hattori, and they acknowledge each other's skills. He is a capable individual with sharp observational powers.

Jinpei Matsuda A police officer who belonged to the Explosive Ordnance Disposal Squad of the Tokyo Metropolitan Police Department's Security Bureau. He possessed a brilliant mind and high technical skills, active as an expert in bomb disposal. Although he appeared short-tempered and blunt, he was caring toward his colleagues and had a strong sense of justice. He was best friends with Kenji Hagiwara and was a person who had a great influence on many people.