Netflix began streaming on Thursday the final trailer for The Ribbon Hero , Twin Engine 's new anime film based on Osamu Tezuka 's Princess Knight ( Ribbon no Kishi ) manga, and it previews the English dub . Twin Engine also streamed the Japanese version of the trailer, which reveals five new cast members, who play Sapphire's coworkers at the mining site. Image courtesy of Netflix ©TWIN ENGINENetflixThe film will premiere exclusively onworldwide on August 8. This year's Annecy International Animation Film Festival featured the film as part of "Annecy Presents," one of the festival's non-competitive sections. The additional staff members include:Kodansha USA Publishing most recently released Tezuka's Princess Knight manga as a one volume omnibus in August 2022.