 Andrew WilsonHopper | Hopper |
 Cassidy GiffordCara | Cara |
 Brianne HoweyJackie | Jackie |
 Reiley McClendonTaylor | Taylor |
 Olivia DraguicevichVeeves | Veeves |
 Max WrightFurby | Furby |
 Hans MarreroThe Guardian | The Guardian |
| RRich SkidmoreRich Pintauro | Rich Pintauro |
| JJocelyn KayHopper's Mom / Leviathan | Hopper's Mom / Leviathan |
 Chris SturgeonHopper's Dad | Hopper's Dad |
| GGrayson-Belle BurtonHopper's Sister | Hopper's Sister |
| JJennifer BatemanFurby’s Mom | Furby’s Mom |
| CCassidy LongoriaFurby’s Sister | Furby’s Sister |
| AAbi MurphyFurby’s Sister | Furby’s Sister |
| SSabin SmithExplorer | Explorer |
| ZZachary MatzCowboy | Cowboy |
| RRusty GrimmerCowboy | Cowboy |
| WWayne DalchauCowboy | Cowboy |
| ZZachary BrunkYoung Hopper | Young Hopper |
| ZZoe BrunkYoung Hopper's Sister | Young Hopper's Sister |
| LLazaro SolaresTaka Taka | Taka Taka |
| SSean CummingsEditor's Favorite Guardian | Editor's Favorite Guardian |
| GGopal BidariGod of Guardians (voice) | God of Guardians (voice) |
| SSammy SayGuardian Warrior | Guardian Warrior |
| JJustin HallGuardian Warrior | Guardian Warrior |
| BBenji JonesGuardian Warrior | Guardian Warrior |
| RRay SmithGuardian Warrior | Guardian Warrior |
| ZZachary BrandonGuardian Warrior | Guardian Warrior |
| JJason ReyesGuardian Warrior | Guardian Warrior |
| ZZiko FarajzadaGuardian Warrior | Guardian Warrior |
