Female, 17 years old. She is Shinichi Kudo's girlfriend. She lives at the Mouri Detective Agency and is Kogoro Mouri's daughter. A karate expert, she is a high schooler capable of smashing telephone poles with ease. She is childhood friends with Sonoko Suzuki and cooks for Kogoro.

Male, 38 years old. A detective, but his deductions are often flawed. He chases after women and frequently gets drunk. He is Ran Mouri's father and works at the Mouri Detective Agency. He is also physically fit.

Male, full name Hiroshi Agasa. A self-proclaimed genius who always creates eccentric inventions. He lives alone in a large house containing a laboratory and a basement. He is 53 years old.

Male, real name Kaito Kuroba. A world-famous phantom thief. However, he returns jewels if they aren't what he's looking for. Murder rates drop on the days he sends heist notices, and his fans swarm the area whenever he steals something, causing a frenzy. A high school student, he uses various gadgets like a hang glider, card gun, and smoke bombs.

Female, always wears a headband. 17 years old. She is childhood friends with Ran and Shinichi. The second daughter of the Suzuki Group, she is incredibly wealthy. She occasionally calls Shinichi "Ran's husband." She is a die-hard fan of Kaito Kid and is in a relationship with Makoto Kyogoku after many ups and downs.

Male, 17 years old. A monster who catches bullets with his bare hands and breaks marble pillars. He fell in love with Sonoko at first sight, leading to their current relationship. He rushes to her side whenever she is in danger and seems to have eyes only for her.

Male, the great detective of the West (Osaka). 17 years old. His father is the Chief of the Osaka Police. His deductive skills are excellent, though slightly behind Shinichi's. He has tanned skin and an impatient personality. He has an ambiguous relationship with Kazuha Toyama—more than childhood friends, but not quite a couple.

Female, 17 years old. She has an ambiguous relationship with Heiji Hattori that is more than childhood friends but less than lovers. She is also childhood friends with Ran.

Male, 72 years old. Sonoko's uncle. An immensely wealthy man who is obsessed with catching Kaito Kid. He frequently holds jewel exhibitions for this purpose, but he is outsmarted by Kaito Kid every time, regardless of how many police officers or security measures he employs.