| Name | Character | Episodes |
|---|---|---|
| Takehito Koyasu | Boris (voice) | 12 |
| Yohei Tadano | Giuliano Flip (voice) | 12 |
| Kaito Ishikawa | Alan Sylvasta (voice) | 12 |
| Hochu Otsuka | Prime Minister Shiramizu (voice) | 12 |
| Yoshimasa Hosoya | Shirou Ogami (voice) | 12 |
| Daisuke Namikawa | Pinga (voice) | 3 |