 Chloë Grace MoretzNimona (voice) | Nimona (voice) |
 Riz AhmedBallister Boldheart (voice) | Ballister Boldheart (voice) |
 Eugene Lee YangAmbrosius Goldenloin (voice) | Ambrosius Goldenloin (voice) |
 Frances ConroyThe Director (voice) | The Director (voice) |
 Lorraine ToussaintQueen Valerin (voice) | Queen Valerin (voice) |
 Beck BennettSir Thoddeus Sureblade (voice) | Sir Thoddeus Sureblade (voice) |
 RuPaulNate Knight (voice) | Nate Knight (voice) |
 Lillah Indya MooreAlamzapam Davis (voice) | Alamzapam Davis (voice) |
 Julio TorresDiego the Squire (voice) | Diego the Squire (voice) |
 Sarah ShermanCoriander Cadaverish (voice) | Coriander Cadaverish (voice) |
 ND StevensonKwispy Dwagon (voice) | Kwispy Dwagon (voice) |
| MMia CollinsDemon Baby (voice) | Demon Baby (voice) |
| ZZayaan KunwarYoung Ballister (voice) | Young Ballister (voice) |
| CCharlotte AldrichYoung Gloreth / Additional Voices (voice) | Young Gloreth / Additional Voices (voice) |
 Karen RyanGloreth / Sir Kahren Reehyan / Additional Voices (voice) | Gloreth / Sir Kahren Reehyan / Additional Voices (voice) |
 Nick BrunoSir Nicholas Brun / Additional Voices (voice) | Sir Nicholas Brun / Additional Voices (voice) |
 Troy QuaneSir Troy Quartermane / Additional Voices (voice) | Sir Troy Quartermane / Additional Voices (voice) |
 Julie ZackarySir Jule Zakaria / Additional Voices (voice) | Sir Jule Zakaria / Additional Voices (voice) |
| RRandy TragerSir Randall Editus / Additional Voices (voice) | Sir Randall Editus / Additional Voices (voice) |
| CChristopher CampbellSir Gottem Lilmush (voice) | Sir Gottem Lilmush (voice) |
 Cindy SlatterySyntheya - Voice of the Kingdom / Additional Voices (voice) | Syntheya - Voice of the Kingdom / Additional Voices (voice) |
 Matthew J. MunnAnnouncer (voice) | Announcer (voice) |
| SSommersill TarabekInstitute Analyst / Additional Voices (voice) | Institute Analyst / Additional Voices (voice) |
| SSebastian TragerDanks Kid (voice) | Danks Kid (voice) |
| SSadie TragerConcerned Citizen #1 (voice) | Concerned Citizen #1 (voice) |
| TTaryn BrunoConcerned Citizen #2 (voice) | Concerned Citizen #2 (voice) |
| LLincoln DavisGoldenloin Fan #1 (voice) | Goldenloin Fan #1 (voice) |
| LLylianna EugenePatience / Additional Voices (voice) | Patience / Additional Voices (voice) |
 Tim NordquistZombie Movie Voice #1 (voice) | Zombie Movie Voice #1 (voice) |
 Maurissa HorwitzZombie Movie Voice #2 / Additional Voices (voice) | Zombie Movie Voice #2 / Additional Voices (voice) |
