| Seiyuu | Role |
| Junichi Kanemaru | Sonic |
| Ryo Hirohashi | Tails |
| Kujira | Ella |
| Sayaka Aoki | Cream |
| Bin Shimada | Chuck (Chris's Grandfather) |
| Chikao Ohtsuka | Dr. Eggman |
| Nobutoshi Hayashi | Knuckles |
| Taeko Kawata | Amy |
| Sanae Kobayashi | Chris |
| Naomi Shindou | Lindsay (Chris's Mother) |
| Naomi Shindou | Danny |
| Yumiko Kobayashi | Messenger Robo |
| Ken Yamaguchi | Deco |
| Noriko Hidaka | Helen |
| Rumi Ochiai | Rouge |
| Bin Shimada | Boco |
| Yuri Shiratori | Maria (Episode 35 - 38) |
| Kouji Yusa | Shadow (Episode 35 - 38) |
| Masakazu Morita | Chris (as an adult Episode 52) |