Yamada is a classmate of Ishida and Asakura with the appearance of a stereotypical nerd wearing thick glasses and having prominent buckteeth. Yamada dreams of opening a bookstore with Asakura but Ishida violently kills him in a slapstick fashion every time the subject is brought up Yamada will always appear unharmed in the next episode. He is a mechanical genius and once built a robot version of himself to fight Ishida.