| Seiyuu | Role |
| Takahiro Sakurai | Yuuri |
| Toshiyuki Morikawa | Konrad |
| Mitsuki Saiga | Wolfram |
| Akio Ohtsuka | Gwendal |
| Kazuhiko Inoue | Günther |
| Masako Katsuki | Zeri |
| Minami Takayama | Anishina |
| Kouki Miyata | Ken Murata |
| Takashi Matsuyama | Dacascos (Episode 9, 21 - 25, 28 - 32) |
| Tamaki Nakanishi | Lazania |
| Yumi Kakazu | Yuuri's Mother (Episode 1, 4, 12, 14, 26, 27) |
| Toru Ohkawa | Heathclife (Episode 5, 22, 23) |
| Jun Fukuyama | Rick (Episode 5 & 7) |
| Hiroko Taguchi | Gisela |
| Kouji Tsujitani | Yuuri's Father (Episode 4 & 26) |
| Unsho Ishizuka | Stohfell (Episode 8 - 11, 17, 24, 26) |
| Yasunori Matsumoto | Raven (Episode 8 - 11, 17) |
| Yukana Nogami | Ulricke (Episode 8, 11, 15, 26 - 29) |
| Masaki Terasoma | Adalbert (Episode 1, 3, 26, 28 - 32) |
| Hiroaki Hirata | Gegenüber (Episode 13, 21 - 26) |
| Yuki Masuda | Nicola (Episode 13 - 15, 21, 24, 25) |
| Yuriko Yamaguchi | Norika (Episode 14 & 15) |
| Daisuke Namikawa | Ryan (Episode 15, 17, 22, 23) |
| Risa Mizuno | Julia (Episode 15, 24, 26, 31) |
| Kentarou Itou | Alford (Episode 19 & 20) |
| Yuu Asakawa | Berma (Episode 19 & 20) |
| Akio Suyama | Marker (Episode 19 & 20) |
| Bin Shimada | Lui Peron (Episode 21 - 23) |
| Motoko Kumai | Greta (Episode 21 - 27, 29, 30) |
| Haruhi Terada | Nina (Episode 22 & 23) |
| Yuuko Gotou | Izala (Episode 21 - 23) |
| Mugihito | Maxeen (Episode 28 - 32) |
| Yoshino Takamori | Frin (Episode 28 - 32) |
| Takaya Hashi | Bob (Episode 4) |
| Noriko Shitaya | Beatrice (Episode 5) |
| Yoko Asada | Roze (Episode 16) |
| Fujiko Takimoto | Risotto (Episode 16) |
| Kumiko Higa | Raven (as a child Episode 17) |
| Kujira | Queen Kumahachi (Episode 18) |
| Keiji Fujiwara | Rodriguez (Episode 26) |
| Tomohiro Nishimura | Keenan (Episode 30 & 31) |
| Ayumi Tsunematsu | Konrad (as a child) |
| Ayumi Tsunematsu | Stohfell (as a child) |
| Emiri Katou | Doria |