| Seiyuu | Role |
| Houko Kuwashima | Kou Shuurei |
| Tomokazu Seki | Shi Ryuuki |
| Hikaru Midorikawa | Shi Seiran |
| Toshiyuki Morikawa | Ran Shuuei |
| Nobuyuki Hiyama | Ri Kouyuu |
| Shuichi Ikeda | Kou Shouka (Shuurei's Father) |
| Kouji Ishii | Advisor Shou |
| Akemi Okamura | Shusui |
| Eri Sendai | Kourin |
| Mitsuru Ogata | Sou Taifu |
| Hidenobu Kiuchi | Ran Ryuuren (Episode 5, 13, 21) |
| Kentarou Itou | Rou Ensei (Episode 8 - 10, 17 - 24) |
| Kazuhiro Nakata | Kou Kijin (Episode 9 - 11, 14, 17 - 19) |
| Mitsuaki Madono | Kou Reishin (Episode 9, 11, 14 - 16, 18, 19) |
| Daisuke Namikawa | To Eigetsu (Episode 12 - 17, 19, 21 - 24) |
| Noriaki Sugiyama | Santa (Episode 12 & 13) |
| Atsushi Kisaichi | Heki Hakumei (Episode 14, 16, 18, 19) |
| Ryoutarou Okiayu | Kou Kurou (Episode 16, 17, 19, 21) |
| Takehito Koyasu | Rin Senya (Episode 23 & 24) |
| Junichi Suwabe | Sa Soujun (Episode 23 & 24) |
| Akemi Okamura | Ryuuki (as a child Episode 4 & 20) |
| Mie Sonozaki | Kou Shoukun (Episode 11 & 20) |
| Nobutoshi Hayashi | Tei Yuushun (Episode 22) |
| Masami Iwasaki | Sa Chuushou (Episode 23) |
| Kousuke Toriumi | Sa Kokujun (Episode 24) |