Tokyo, Japan – July 19, 2025 – The highly anticipated anime adaptation of A Tale of the Secret Saint (Tensei Shita Daiseijo wa, Seijo de Aru Koto wo Hitakakusu) is officially slated for a 2026 premiere, as announced during the Earth Star Novel 10th Anniversary Summer Festival in Tokyo. The event unveiled the first teaser promotional video and introduced the key production staff and voice cast, heightening excitement for the upcoming fantasy series. Produced by FelixFilm, the anime promises to bring the beloved light novel series to life with a talented team and a visually captivating adaptation.
The teaser trailer, showcased at the festival, offers a glimpse into the world of A Tale of the Secret Saint. It opens with a dramatic scene featuring the protagonist, Fia Ruud, lying injured on the ground, surrounded by a pool of blood, hinting at the high stakes and emotional depth of the story. The trailer highlights the lush animation style of FelixFilm, known for its work on titles such as Nekopara and I Want to Eat Your Pancreas, setting the stage for a visually striking adaptation. Alongside the trailer, the main staff and cast were revealed, showcasing a blend of seasoned professionals and rising stars in the anime industry.
Leading the creative direction is Tomoe Makino, who serves as the director, bringing experience from Aharen-san wa Hakarenai and Woodpecker Detective’s Office. Naoki Murata, known for his episode direction on Sasaki and Miyano and Teasing Master Takagi-san, joins as assistant director. The series scripts are overseen by Deko Akao, whose portfolio includes Higehiro and Komi Can’t Communicate, ensuring a strong narrative foundation. Character designs are crafted by Satomi Kurita, previously involved with Dahlia in Bloom: Crafting a Fresh Start with Magical Tools, while Ryosuke Naya serves as sound director, and Kenichiro Suehiro composes the music, promising an evocative soundtrack to complement the story.
The main voice cast, bringing the characters to life, includes:
Shion Wakayama as Fia Ruud
Shinnosuke Tokudome as Zavilia
Yuichiro Umehara as Saviz Nabu
Nobunaga Shimazaki as Cyril Sutherland
What is A Tale of the Secret Saint about?
A Tale of the Secret Saint originates from a Japanese light novel series written by Touya with illustrations by chibi. Initially serialized on the user-generated website Shosetsuka ni Naro in January 2019, the series caught the attention of Earth Star Entertainment, which began publishing it under their light novel imprint in June 2019. The novels have since garnered significant popularity, with over 3.5 million copies in circulation. A manga adaptation by Mahito Aobe launched in December 2019 on the Comic Earth Star website, further expanding the franchise’s reach. Additionally, a prequel light novel series, A Tale of the Secret Saint ZERO, began publication in July 2022, with its own manga adaptation starting in October 2023. The series has earned critical acclaim, ranking second in the Tankōbon and Novel categories of Takarajimasha’s Kono Light Novel ga Sugoi! guidebook for both 2024 and 2025.
The story, as described by Seven Seas Entertainment, which publishes the English editions of both the light novels and manga, follows a young woman’s journey in a fantasy world imbued with magic and personal conflict:
Born into a long line of knights, Fia is determined to become a knight herself, just like all her siblings. But a brush with death awakens memories of her past life as a Saint–a woman who wields rare, powerful healing and protection magic–along with the ability to use that magic herself! The downside is that Fia also remembers her past life’s untimely death, and the danger she will be in if anyone finds out what she really is. She vows to stay on her knighthood path and keep her powers a secret forever! But how can she resist using her newfound powers when they’re just so useful?
This narrative blends themes of self-discovery, secrecy, and resilience, as Fia navigates her dual identity as both a knight-in-training and a reincarnated Saint with extraordinary abilities. The story promises a mix of action, emotional depth, and fantasy elements, appealing to fans of the isekai and female-led fantasy genres.
With its 2026 release, A Tale of the Secret Saint is poised to be a standout addition to the anime landscape, combining a compelling story with a skilled production team and a promising voice cast. The teaser trailer has set high expectations, offering a taste of the emotional and visual journey awaiting viewers. As production progresses, further details on additional cast, theme songs, and a precise premiere date are expected to be revealed, building anticipation for this adaptation of a beloved light novel series.
Source: Comic Natalie
