| Seiyuu | Role |
| Ami Koshimizu | Tenma Tsukamoto |
| Hiroki Takahashi | Kenji Harima |
| Daisuke Kishio | Kyousuke Imadori |
| Shinji Kawada | Haruki Hanai |
| Mako | Karen Ichijou |
| Yukari Fukui | Sarah Adiemus |
| Kaori Shimizu | Akira Takano |
| Hitomi Nabatame | Mikoto Suou |
| Yui Horie | Eri Sawachika |
| Mamiko Noto | Yakumo Tsukamoto |
| Satomi Hanamura | Ayano Kinugawa (Episode 2 - 7) |
| Hiroki Yasumoto | Masakazu Tougou |
| Nobuyuki Hiyama | Harry MacKenzie |
| Yuu Kobayashi | Lara Gonzales |
| Makoto Yasumura | Ryuuhei Suga |
| Mariya Ise | Satsuki Tawaraya (Episode 8 - 10, 23) |
| Mitsuhiro Ichiki | Hiroyoshi Asou |
| Yuuki Tai | Kentarou Nara |
| Yuu Asakawa | Itoko Osakabe |
| Hiroyuki Yoshino | Takeichi Fuyuki |
| Yuri Amano | Eri's Mother (Episode 17) |
| Tomoyuki Shimura | Noboru Tennouji (Episode 1, 5, 22, 25) |
| Rina Satou | Kousuke Ichijou (Episode 22 & 23) |
| Tetsu Inada | Gorou (Episode 22) |
| Norihiro Inoue | Narration (Episode 25) |
| Norihiro Inoue | Tenma's Father (Episode 26) |
| Yuuki Tai | Masaaki Mitsui (Episode 15 & 25) |
| Tomoe Oumi | Madoka Kido (Episode 2, 5, 6, 13) |
| Hiroki Yasumoto | Masaru Suzuki (Episode 16 & 17) |
| Kouji Ishii | Gotou (Episode 15, 19, 23, 25) |
| Mika Kanai | Piotr (Episode 12 & 23) |
| Hiroki Yasumoto | Koriyama-sensei (Episode 3 & 5) |
| Maria Yamamoto | Rinko (Episode 2 , 6, 10) |
| Maria Yamamoto | Saeko (Episode 5 & 13) |
| Daisuke Hirakawa | Kazuya Tanaka (Episode 2, 3, 6, 11, 13) |
| Yuuko Sanpei | Shuuji Harima (Episode 5 & 12) |
| Sayuri Yahagi | Mio Tennouji (Episode 5) |
| Aya Hirano | Youko Sasakura (Episode 7, 16, 19, 22, 23) |
| Katsuyuki Konishi | Killer (Episode 8 & 21) |
| Makoto Yasumura | Hayato Tani (Episode 10) |
| Sayaka Ohara | Tae Anegasaki (Episode 5, 8, 9) |