Main Characters[]
| Character | Voice actor | Appearances |
| Aquaman | ||
| Tempest | ||
| Aqualad | ||
| Aquagirl |
| Character | Voice actor | Appearances |
| Black Manta | ||
| Trident | ||
| Sea Boy | ||
| Coral | ||
| Ocean Master | ||
| Siren | ||
| Nereus | ||
| Slizzath | ||
| The Dead King |
| Character | Voice actor | Appearances |
| Mera | ||
| Arthur Curry Jr. | ||
| Defile | ||
| Cerdian | ||
| Vulko | ||
| Sky Alchesay | ||
| Victorio Alchesay |
Recurring Characters[]
| Character | Voice actor | Appearances |
| Tula | ||
| Murk | ||
| Storm the Seahorse | ||
| Tusky the Walrus | ||
| Porm | ||
| Porpy | ||
| Topo the Octopus | ||
| Ya'Wara | ||
| Vostok-X | ||
| Kahina the Seer | ||
| Prisoner of War | ||
| The Operative | ||
| Lori Lemaris | ||
| Lagoon Boy | ||
| Martian Manhunter | ||
| Wonder Woman | ||
| Warhawk | ||
| Red Arrow | ||
| Changeling | ||
| Superboy | ||
| Wonder Girl | ||
| Bombshell | ||
| Rocket | ||
| Amanda Waller |
| Character | Voice actor | Appearances |
| Scavenger | ||
| King Shark | ||
| Fisherman | ||
| Queen Clea | ||
| The Eel | ||
| The Trench | ||
| Killer Frost | ||
| Swatt | ||
| Skinwalker |
| Character | Voice actor | Appearances |
| Mr. Hyde | ||
| Mrs. Hyde | ||
| Aquadog | ||
| Anton Geist | ||
| Esther Maris | ||
| Stephen Shin | ||
| Dane Dorrance | ||
| Judy Walton | ||
| Nicky Walton | ||
| Gideon Rivers | ||
| Henry Kucharski | ||
| Melinda Spyros | ||
| Sigourney Amundsen | ||
| David Davies | ||
| Deputy Wilson | ||
| Jennifer | ||
| Letifos | ||
| Captain Moller | ||
| Urn |
Minor characters[]
| Character | Voice actor | Appearances |
| Neptune Perkins | ||
| King Iqula | ||
| Tsunami | ||
| Arion | ||
| Lady Chian | ||
| Wyynde | ||
| Lady of the Lake | ||
| Geo-Force |
| Character | Voice actor | Appearances |
| Count Vertigo |
| Character | Voice actor | Appearances |
| Tom Curry | ||
| Atlanna | ||
| King Orin |