Co Starring Josh Tedeku as Wish Spur Martha Malone as Elna Bamshad Abedi-Amin as Fritz Adam Isla O'Brien as Strego Nall Robyn Holdaway as Blu Arthur Lee as Tycho Heller Hoji Fortuna as Booker Éva Magyar as Ennis Charis Agbonlahor as Loa Shanelly Perera as Young Indira Sianna Patel as Snow Will O'Connell as Instructor #2 (Ruthchild) Seán T. Ó Meallaigh as Sirl Michelle Lehane as Instructor (Kardos) Sinéad Akeke as Orion