| Seiyuu | Role |
| Nobutoshi Hayashi | Ryou Takatsuki |
| Shinichirou Miki | Hayato Shinguu |
| Yuuji Ueda | Takeshi Tomoe |
| Minami Takayama | Kei Kuruma |
| Aya Hisakawa | Alice |
| Juurouta Kosugi | Knight |
| Shuichi Ikeda | Jabberwock |
| Atsushi Kisaichi | Keith Green |
| Houko Kuwashima | Keith Violet |
| Yasuhiko Kawazu | Keith Silver |
| Kinryu Arimoto | Iwao Takatsuki |
| Ryoutarou Okiayu | Keith Black |
| Daiki Nakamura | Kouichi |
| Megumi Ogata | Al Bowen |
| Hisao Egawa | Horst (Episode 15 & 22) |
| Masashi Hirose | Pasolini (Episode 13) |
| Yuuji Takada | Huey (Episode 20 - 22) |
| Shinpachi Tsuji | Graham (Episode 8) |
| Mariko Suzuki | Charlie (Episode 3 - 5, 9) |
| Yasuyuki Kase | Hound (Episode 2 & 5) |
| Mami Matsui | Oscar (Episode 2 - 5, 9, 11) |
| Kazuhiko Inoue | Keith White (Episode 16, 23 - 26) |