Tokyo, Japan – Renowned voice actors Maaya Uchida, Natsuki Hanae, and Jun Fukuyama have been announced as new additions to the cast of the upcoming TV anime adaptation of Kujira Tokiwa’s fantasy light novel series, The Holy Grail of Eris (Eris no Seihai). The trio will take on supporting roles in the series, which is set to premiere on January 8, 2026.
The official announcement details Maaya Uchida as Cecilia Adelweiss, Natsuki Hanae as Enrique Adelweiss, and Jun Fukuyama as Dominic Harmsworth. Their involvement further enhances the anticipation for the anime, which already features a prominent cast including Kana Ichinose as Constance Grail and Sayumi Suzushiro as Scarlett Castiel.
A Deeper Dive into the Cast and Characters
The newly revealed cast members are well-known for their extensive work across numerous popular anime titles.
Maaya Uchida as Cecilia Adelweiss
Maaya Uchida is celebrated for her versatile voice work, having lent her talents to characters such as Raphtalia in The Rising of the Shield Hero and Catarina Claes in My Next Life as a Villainess: All Routes Lead to Doom!. Her role as Cecilia Adelweiss is expected to bring a nuanced performance to the character.
Natsuki Hanae as Enrique Adelweiss
Natsuki Hanae, a highly acclaimed voice actor, is recognized globally for his portrayal of Tanjiro Kamado in Demon Slayer: Kimetsu no Yaiba and Ken Kaneki in Tokyo Ghoul. His addition as Enrique Adelweiss promises a compelling performance, adding another layer to the anime’s narrative.
Jun Fukuyama as Dominic Harmsworth
Jun Fukuyama brings a wealth of experience, known for iconic roles such as Lelouch Lamperouge in Code Geass and Koro-sensei in Assassination Classroom. His casting as Dominic Harmsworth is anticipated to deliver a memorable character to the series.
The Holy Grail of Eris: Story and Production
The Holy Grail of Eris anime is an adaptation of Kujira Tokiwa’s light novel series, which began serialization online in 2017 before being published in print with illustrations by Yuunagi. A manga adaptation by Hinase Momoyama has also been ongoing since 2019.
Plot Overview
The story centers on Constance “Connie” Grail, a sincere but unremarkable noblewoman who finds her life upended when she’s framed for a crime and loses her fiancé. In a twist of fate, she is possessed by the ghost of the infamous villainess Scarlett Castiel, who was executed a decade prior for allegedly attempting to poison Princess Cecilia. With Scarlett’s charisma and intellect, they work together to clear Connie’s name and, in return, Connie commits to uncovering the truth behind Scarlet’s unjust death and a far-reaching conspiracy. Yen Press publishes both the light novel and manga in English.
Production Details
The anime is being produced by Ashi Productions, with Morita to Junpei directing the series. Kenichi Yamashita is handling the series composition and script, while Chie Kawaguchi is responsible for character designs. Good Smile Film and DRE Pictures are handling general production.
The opening theme song, “Happy Ever After feat. YU-KA,” is performed by Reina Washio, and the ending theme song, “Camellia,” is performed by Yukari Tamura.
Release Information
The Holy Grail of Eris is slated to premiere on January 8, 2026, on TBS and 28 affiliated channels in Japan, and will also air on BS11. Aniplus Asia has licensed the series and will stream it for the Winter 2026 season. The anime was initially announced in September 2024, with a new trailer and the 2026 premiere date revealed at Anime Expo 2025.
