| Artist name | Roles | Recordings |
|---|---|---|
| Ayreon | ||
| Shadow Gallery | ||
| Therion | ||
| 박재천 |
| Artist name | Roles | Recordings |
|---|---|---|
| Ayreon | ||
| Shadow Gallery | ||
| Therion | ||
| 박재천 |
| Artist name | Roles | Recordings |
|---|---|---|
| Ayreon | vocal | Journey on the Waves of Time |
| Shadow Gallery | vocal | Strong |
| Therion | vocal | The Wild Hunt |
| 박재천 | vocal | Higher |