| Ruler | Kingdom | Era |
|---|---|---|
| Mr. Ares The Grim Reaper | 48 | |
| Viceroy Grim Reaper | 10 | |
| Mr. Grim Reaper | Shinobi Empire | 22 |
| Mr. Grim Reaper | 22 | |
| Mr. Grim Reaper | 22 | |
| Mr. Grim Reaper | 22 | |
| Mr. Grim Reaper | Valhalla | 23 |
| Mr. Grim Reaper | 23 | |
| Mr. Grim Reaper | Valhalla | 23 |
| Mr. Grim Reaper | Shen an Calhar | 28 |
| Mr. Grim Reaper | 47 | |
| Mr. Grim Reaper | 47 | |
| Mr. Grim Reaper | Lost Souls | 48 |
| Mr. Grim Reaper | 48 | |
| Mr. Grim Reaper | 48 | |
| Mr. Ignis The Grim Reaper | The Grim Reapers | 47 |