| Seiyuu | Role |
| Nobutoshi Hayashi | Ryou Takatsuki |
| Shinichirou Miki | Hayato Shinguu |
| Yuuji Ueda | Takeshi Tomoe |
| Minami Takayama | Kei Kuruma |
| Shuichi Ikeda | Jabberwock |
| Shou Hayami | Keith Red |
| Miyuki Ichijou | Misa Takatsuki |
| Yuri Shiratori | Carol |
| Megumi Ogata | Al Bowen |
| Yasuhiko Kawazu | Aya's Father (Episode 20 & 25) |
| Aya Hisakawa | Aya (Episode 20, 22, 25) |
| Mitsuo Iwata | Gaus (Episode 10, 17, 19 - 25) |
| Jouji Nakata | Ralph Coleman (Episode 13, 18, 24 - 26) |
| Katsuhisa Houki | Takeshi's Father (Episode 14 & 26) |
| Mitsuaki Madono | Higgins (Episode 21 - 23) |
| Nobuyuki Hiyama | Cliff (Episode 13 - 19) |
| Masashi Hirose | Wolf (Episode 15 & 19) |
| Katsuhisa Houki | Kyklops (Episode 16) |
| Masaki Aizawa | Carol's Father (Episode 16) |
| Kinryu Arimoto | Ryou's Father (Episode 15) |
| Daisuke Gouri | Gashley (Episode 8 - 12) |
| Issei Futamata | Face (Episode 8 - 10) |
| Chieko Honda | Bee (Episode 8 - 11) |
| Juurouta Kosugi | Kurou (Episode 1 - 3) |
| Juurouta Kosugi | Knight (Episode 22, 23, 25) |