The highly anticipated television anime adaptation of Kujira Tokiwa and Yuunagi’s light novel series, “The Holy Grail of Eris” (Erisu no Seihai), has officially revealed its second promotional video, confirming a January 2026 debut. The announcement was made at Anime Expo on Saturday, further solidifying the release window for fans eagerly awaiting the fantasy-suspense drama. In Japan, the series is slated to air on TBS and its affiliated stations, as well as on BS11.
The Premise of “The Holy Grail of Eris”
“The Holy Grail of Eris” is a fantasy and suspense series that delves into themes of injustice, revenge, and uncovering hidden truths. The story centers on Constance “Connie” Grail, a young noblewoman known primarily for her sincerity. Her life takes a dramatic turn when she is falsely accused of a crime and loses her fiancé. In her despair, Connie encounters the ghost of Scarlett Castiel, an infamous noblewoman executed ten years prior for seemingly wicked deeds, widely regarded as the “most notorious villainess of her time.”
Scarlett, with her undeniable charisma and intelligence, possesses Connie’s body, swiftly turning the tables on her tormentors and clearing Connie’s name. In return for this intervention, Scarlett demands Connie’s help in investigating the true circumstances surrounding her own untimely death and a conspiracy that continues to unfold. As Connie delves deeper, engaging in undercover operations, a fake engagement, and confrontations with powerful figures, she begins to uncover a far-reaching conspiracy.
Production and Staff Behind the Adaptation
The anime adaptation is being produced by Ashi Productions, with Good Smile Film and DRE Pictures handling general production. The directorial helm is taken by Morita to Junpei (also known as JUMPEI & MORITA), known for their work on “LOST SONG”. Kenichi Yamashita is responsible for the series composition and episode scripts, while Chie Kawaguchi is designing the characters. Other key staff members include Jun Yukawa for sub-character design, Nobuhito Sue (Kusanagi) as art director, Aiko Yamagami (T.D.I.) for color design, Yūko Kamahara (T.D.F.) as director of photography, Yuriko Sano (T.A.P.) as editor, and Yūichi Morita as sound director.
The light novel series, written by Kujira Tokiwa and illustrated by Yuunagi, originally began serialization online in October 2017 on the user-generated novel publishing website Shōsetsuka ni Narō. SB Creative later acquired the series, publishing four volumes under their GA Novel imprint from November 2019 to March 2022. A new edition, which includes a newly written fifth volume, began publication under Drecom Media’s DRE Novels imprint in November 2024. Yen Press licenses both the light novels and the manga adaptation in North America, with the latter featuring art by Hinase Momoyama and serialization on Square Enix’s Manga Up! website since November 2019. A sequel manga titled “Eris no Seihai S” by S. Kosugi also began serialization in November 2024.
Cast Members Bringing the Characters to Life
The anime boasts a talented voice cast, with some members reprising their roles from previous drama CDs. Kana Ichinose, known for her role as Fern in “Frieren: Beyond Journey’s End”, stars as Constance Grail. Sayumi Suzushiro, recognized for voicing Nijika in “BOCCHI THE ROCK!”, takes on the role of Scarlett Castiel. Additionally, Yōhei Azakami voices Randolph Ulster, and M.A.O portrays Lily Orlamunde.
The first anime adaptation announcement was made in October 2024, accompanied by a teaser video and visual. The release of the second promotional video at Anime Expo reaffirms the project’s progress and sets the stage for its highly anticipated premiere in early 2026. Fans can look forward to seeing the intricate plot and dynamic duo of Connie and Scarlett come to life on screen.
