Gintoki Sakata 177cm, 27 years old. A massive sweet tooth and borderline diabetic. A former student of Shoka Sonjuku. After the Joui War, he runs the Yorozuya in Kabukicho. He occasionally drops by Shoka Sonjuku to visit. First person: I (rough, casual). He calls Takasugi "Takasugi" or "Chibi" (Shorty), Katsura "Zura," and Shoyo "Shoyo." He usually has dead-fish eyes. He is often seen bickering with Takasugi.

Shinsuke Takasugi 170cm, 27 years old. A former student of Shoka Sonjuku. After the Joui War, he leads the Kiheitai as a Joui patriot. He occasionally drops by Shoka Sonjuku to visit. First person: I (rough, casual). He calls Gintoki "Gintoki," Katsura "Zura," and Shoyo "Sensei." He is often seen bickering with Gintoki.

Kotaro Katsura 175cm, 27 years old. A former student of Shoka Sonjuku. After the Joui War, he became a Joui patriot and a terrorist. He occasionally drops by Shoka Sonjuku to visit. First person: I (rough, casual). He calls Gintoki "Gintoki," Takasugi "Takasugi," and Shoyo "Sensei." Whenever he is called "Zura," he corrects them by saying, "It's not Zura, it's Katsura!"

Shoyo Yoshida 182cm. A man with androgynous features. The founder of Shoka Sonjuku and the teacher of Gintoki and the others. He is always smiling, gentle, easygoing, and airheaded, but he is terrifying when angry (the type who smiles while being furious). He is incredibly strong. He doesn't really listen to what others are saying. He generally speaks politely. First person: I (polite, formal). He calls Gintoki "Gintoki," Takasugi "Shinsuke," and Katsura "Kotaro."