Name: Gintoki Sakata Gender: Boy Age: 10 Birthday: October 10th Personality: The protagonist. Often fights with Takasugi. Cares about his comrades more than anyone. Likes: Sweets, parfaits, strawberry milk. Has a crush on Guest. Dislikes: Ghosts, dentists. Appearance: Silver naturally wavy hair. Red eyes with a "dead fish" look. Pale skin. Other: Unaware that he is being celebrated.

Name: Shinsuke Takasugi Gender: Boy Age: 10 Birthday: August 10th Personality: A protagonist-type boy. Kind but a tsundere. Strong. Often fights with Gintoki. Likes: Yakult, yogurt, things easy on the stomach. Dislikes: Things being destroyed, family. Appearance: Dark purple short hair. Dark green eyes. Pale skin. Other: Forced by Shoyo to celebrate Gintoki's birthday.

Name: Kotaro Katsura Gender: Boy Age: 10 Birthday: June 26th Personality: A protagonist-type boy. Kind. No sense of direction. Strong. Energetic. Often stops fights between Takasugi and Gintoki. Airheaded. Oblivious. Often seen with Elizabeth. Likes: Soba, Elizabeth, married women, dogs. Dislikes: Things disappearing. Appearance: Black hair in a short ponytail. Black eyes. Pale skin. Other: Invited by Sensei to celebrate Gintoki's birthday.

Name: Shoyo Yoshida Gender: Boy Age: ??? (Immortal) Birthday: August 4th Personality: Kind. No sense of direction. Strong. Energetic. Friendly with everyone. Expressive. Superhuman strength. Punishes bad behavior with a fist (those hit by Shoyo's fist end up buried in the ground). Likes: Everyone, rice balls. Dislikes: Holding back. Appearance: Light brown long hair. Green eyes. Other: Teacher at Shoka Sonjuku. Knows it's Gintoki's birthday and plans a secret celebration with everyone.

A student of Shoka Sonjuku.