Answer
In Detective Conan, Kappei Yamaguchi lends his voice to two iconic characters: Shinichi Kudo, the intelligent high school detective whose body was shrunk to that of a child, and Kaito Kid, the mysterious and skilled phantom thief who challenges Conan's detective abilities. Both characters are known for their complex personalities, and Yamaguchi's voice acting brings them to life, adding depth and charm to their interactions with other characters.