Twin Engine has released a promotional video for The Ribbon Hero, a new anime film adapting Osamu Tezuka's classic Princess Knight (Ribbon no Kishi) manga. The promo focuses on the relationship between the two main characters, Sapphire and Pine, highlighting their connection as the story unfolds.

The film arrives exclusively on Netflix worldwide on August 8, 2026. It's also being featured at this year's Annecy International Animation Film Festival in France as part of "Annecy Presents," a non-competitive festival section.

The story follows Sapphire, a princess from the fallen kingdom of Silverland who has lost everything to a destructive force called Nergal. After arriving in Goldland, she finds hope through the kindness of its people—including her friend Pine. When Nergal resurfaces and threatens her new home, Sapphire resolves to fight back and protect those around her.

Saya, from the comedy duo Lalande, voices Sapphire in what Netflix confirms is her first lead role in a feature-length animated production. Seiran Kobayashi plays Pine, with additional cast members including Kōki Uchiyama as Velvet and Mayumi Shintani as Zirco.

Yuuki Igarashi, known for his work on Star Wars: Visions and Jujutsu Kaisen, directs the film through his new studio OUTLINE, marking his feature-length directorial debut. Kei Mochizuki handles character design with assistance from Mai Yoneyama (Kiznaiver), while Issei Arakaki serves as animation character designer. The music comes from Satoru Kōsaki and Ryūichi Takada of MONACA, both veterans of major anime productions.

The theme song "Reborn" is performed by the Japanese/Korean group Girls Archives. Additional creative contributors include artist director Cédric Hérole and character designer okama, among others.

This marks a fresh take on Tezuka's 1953 manga, one of the medium's most influential works, bringing his classic story to modern audiences through a contemporary lens.