| Ruler | Kingdom | Era |
|---|---|---|
| Mr. Hammerhead | Global Defence Initiative | 31 |
| Mr. Hammerhead | 48 | |
| Mr. Jarhead | 23 | |
| Mr. Jarhead | 38 | |
| Mr. Jarhead | Dorian Empire | 38 |
| Mr. Jarhead | 48 | |
| Mr. Jarhead | 48 | |
| Sir Jondrus Copperhead | Dendarii Mercenary Corps | 43 |
| Mr. Overheat | Peacekeepers | 47 |
| Mr. Peckerhead | Pestilence | 48 |
| Ms. Rheaea | 48 | |
| Mr. Silverheart | Super Happy Fun Group | 47 |
| Mr. Silverheart | Rome | 47 |
| Mr. Silverheart | Super Happy Fun Group | 48 |
| Mr. Silverheart | 48 | |
| Mr. Spearhead | 48 | |
| Mr. Superheat | Peacekeepers | 47 |
| Mr. Warhead | Death Eaters | 47 |
| Sir Warheart | The Ravage Regime | 44 |
| Sir Warheart | The Ravage Regime | 44 |