| Seiyuu | Role |
| Houko Kuwashima | Bocca Serenade |
| Masumi Asano | Sayoko |
| Mitsuru Miyamoto | Kurofune Ballade (Episoe 1, 2, 13, 14, 16) |
| Sanae Kobayashi | Toone Requiem (Episode 6 - 9, 16, 17, 20 - 23) |
| Yukari Tamura | Coco (Episode 9 - 11, 16 - 23) |
| Souichirou Hoshi | Skyblue (Episode 6 - 8, 15 - 23) |
| Daisuke Namikawa | Kron (Episode 9 - 11, 18 - 23) |
| Issei Miyazaki | Hikari |
| Tomo Saeki | Solo (Episode 12 - 14, 19, 20, 24) |
| Katsuhiro Harasawa | Nick |
| Mamiko Noto | Melody of Oblivion |
| Shoutarou Morikubo | Hol (Episode 1, 2, 13, 14) |
| Mai Nakahara | Elle Sonoda (Episode 1, 2, 12, 13) |
| Yuri Amano | Keiko Hamazaki (Episode 3 - 5) |
| Kana Ueda | Kyuu-chan (Episode 3 - 5) |
| Aya Hisakawa | Miri (Episode 6 - 8) |
| Yasuyuki Kase | Wakadan (Episode 3 - 5) |
| Mitsuaki Madono | Masaru (Episode 9 - 11) |
| Kouichi Tohchika | Eichi Hikoyama (Episode 6 - 8, 20) |
| Ryoutarou Okiayu | Global Yamaneko (Episode 11, 12, 23) |
| Rio Natsuki | Chief V (Episode 11) |
| Hiroko Taguchi | Yuu (Episode 12 & 13) |
| Mami Kosuge | Tamakorogashi (Episode 10, 14, 24) |
| Toru Furusawa | Young Tsunagi (Episode 11) |
| Yuri Shiratori | Flying Bunny / Mito (Episode 15 - 17, 21 - 23) |
| Yasunori Matsumoto | Lucky Thoroughbred (Episode 15 - 17) |
| Yoshino Takamori | Discount Uribou (Episode 4, 19, 21 - 23) |
| Ken Yamaguchi | Child Dragon (Episode 17, 19 - 23) |
| Yumiko Kobayashi | Yousui / Electric Sheep (Episode 18 - 20) |
| Katsuhiro Harasawa | Arukoto Naikoto Parakeet |
| Hiro Shimono | Elan Vital (Episode 2 & 24) |
| Fuyuka Ooura | Kaon (Episode 24) |
| Youji Ueda | Bocca's Father (Episode 1 & 2) |