Nekketsu High School[]
| Character | Japanese Voice | English Voice | Description |
|---|---|---|---|
Kōji  |
? | Michael Adamthwaite | A player on the Dodgeball team |
Sanjuro Sugata  |
? | Andrew Francis | the self-proclamed apprentice of Kunio |
Rika Asano  |
Masako Nozawa | Xanthe Huynh | The manager of the Baseball team who is prone to illness |
Yōichi  |
? | Samuel Vincent (credited as Sam Knouth) | A hockey player |
| Kaori | Cristina Vee | The manager of the newspaper of Nekketsu High School | |
Tadokoro Junji  |
Donpei Tsuchihira | Greg Chun | The previous banchō of Nekketsu High School |
Hanazono High School[]
| Character | Japanese Voice | English Voice | Description |
|---|---|---|---|
Hikaru Saotome  |
? | CJ Dachamp | the second strongest deliquent in Hanazono High after Riki |
Shuji Washio  |
? | Ian James Corlett | Hanazono High's top baseball player |
Kōichi Shimizu  |
? | Mark Oliver | Washio's best friend |
Mitsuaki Yoshino  |
Ryō Horikawa | Brent Miller | One of Riki's disiples |