This is episode 0, the prequel to the main Keroro Gunsou anime series. KeroZero was shown in theaters with Keroro Gunsou Movie 4.
| Actor | Role |
|---|---|
 Kumiko WatanabeNot listed | Not listed |
 Etsuko KozakuraNot listed | Not listed |
 Jouji NakataNot listed | Not listed |
 Takehito KoyasuNot listed | Not listed |
 Takeshi KusaoNot listed | Not listed |