| Artist name | Roles | Recordings |
|---|---|---|
| Sequoia String Quartet | ||
| Syu (metal guitarist) |
| Artist name | Roles | Recordings |
|---|---|---|
| Sequoia String Quartet | ||
| Syu (metal guitarist) |
| Artist name | Roles | Recordings |
|---|---|---|
| Sequoia String Quartet | vocal | Fast as a Shark |
| Syu | vocal | The Damnation Game |