| Seiyuu | Role |
| Yuuji Ueda | Hameln |
| Mayumi Iizuka | Flute |
| Kouki Miyata | Lute |
| Unsho Ishizuka | Hell King Bass |
| Chinami Nishimura | Cornet (Episode 7 - 14, 16 - 23, 25) |
| Mitsuaki Madono | Clarinet |
| Sumi Shimamoto | Queen Horn |
| Shigeru Chiba | Obo |
| Kouji Tsujitani | Raiel |
| Megumi Ogata | Sizer |
| Takashi Matsuyama | Beast King Guitar |
| Shinichirou Miki | Gaita (Episode 16 - 20) |
| Tomomichi Nishimura | King Zithern (Episode 16 - 24) |
| Kyoko Tsuruno | Ocarina (Episode 15, 17 - 23, 25) |
| Ginzou Matsuo | King Syrinx (Episode 5, 6, 22) |
| Eiji Maruyama | Horo (Episode 3, 16 - 19) |
| Kiyoyuki Yanada | Gong (Episode 16 - 20, 23) |
| Kiyoyuki Yanada | Dragon King Drum (Episode 1, 4 - 14, 24, 25) |
| Mugihito | Narration |
| Mugihito | Resik (Episode 1, 2, 7, 10, 11) |
| Yuuji Ueda | Chestra (Episode 24) |
| Takashi Matsuyama | Vocalist (Episode 1 & 2) |
| Kiyoyuki Yanada | Zampano (Episode 21 & 22) |