A 7-year-old boy whose true identity is the high school detective 'Shinichi Kudo,' who was shrunk by a drug. He acts like a child in front of those who don't know his secret, but uses his normal speech around Heiji. He possesses sharp deductive reasoning and insight.

A 16-year-old high school girl and the daughter of Kogoro (who is absent due to circumstances). She is usually kind, but in times of crisis, she shows off her karate skills without hesitation. As Shinichi's childhood friend, she is waiting for him to return, having realized her feelings for him.

A 16-year-old high school girl and Heiji's childhood friend. She has a kind, bright, and cheerful personality, but despite her cute appearance, she has a bold and energetic side that cannot tolerate injustice. She is a native of Kyoto.

A 35-year-old man and a Noh actor. He has a gentle and cautious personality.

A 52-year-old woman who runs a traditional restaurant. She is considerate enough to easily provide clues to Conan's group as they investigate the case.

A 34-year-old man who is the first to be murdered by the true culprit.

A 35-year-old man who is the second to be murdered by the true culprit.

A 35-year-old man who is the third to be murdered by the third culprit.

A 35-year-old man and the owner of a used bookstore. He has the image of a handsome and impressive older man who helps Heiji's group. He was the culprit who murdered Rokuro, Hachiro, and Shichiro. The theft of the Buddha statue was also committed by Saijo in collusion with those three, and he committed the team-kill to secure the funds to establish a dojo by selling the statue.

A 28-year-old man and an inspector with the Kyoto Prefectural Police. He carries around a squirrel named 'Maro.' He is a character with elegant, old-fashioned speech and cold, intellectual investigative skills.