With their guides, fellow Order of Mata Nui members Darren and Kouji and the new Toa, the Toa Magia, save the world from monsters and villains.
- Brodie Battle as George Denman/Mavkhi
- Freddie Derricks III as Zanny D./Fotahki II
- Isamu Kurosawa as Ethan Tachibana/Fopi
- Carlos Shee as Neil Crunk/Madgitoz
- Venus Olajumoke as Johanna Carly/Lhiira
- Jayden Carry as Mark Gowan/Trinn
- Ryouichi Andrews as Kouji Nishimura
- August Andreasen as Darren Lange
Development and production
Pasi Peure stated in a interview "This is not a new Bionicle project... this is a retry, not a reboot." The series incorporates scrapped ideas (such as shapeshifting guides, shapeshifter assassins, and cyborg dinosaurs, which were to be seen in cancelled films, the original version of Bionicle X and Bionicle XI.) as well as the concepts from Mehboob's comics.
Kruku Makusa was originally going to reprise his role as Em Yoshimura in the show, but he turned it down due to his ill health. He died two months before the show's premiere. Halcyone Ferrara was also asked to reprise her role as Aquila Hadaway in the show but she refused because she pointed that she was already in two Technic Heroes shows.