The Holy Grail of Eris 2026
What is The Holy Grail of Eris?
The television series The Holy Grail of Eris is a 2026 production that features a complex storyline with themes of betrayal, secrets, and power. According to the series' synopsis, the story revolves around Constance Grail, a viscount's daughter known for her honesty, who faces a dramatic turn of events.
- Type
- TV series
- Year
- 2026
- Status
- Ended
- Episodes
- 12
- First aired
- Jan 8, 2026
- Last aired
- Mar 26, 2026
- Original language
- JA
- Origin
- JP
- Networks
- MBS, TBS, CBC, Tulip Television
- Genres
- Animation, Mystery, Sci-Fi & Fantasy
- Updated
Where to watch
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Streaming availability data provided by JustWatch via TMDB. Availability changes by country and date; verify on the provider before subscribing or purchasing.
How long to binge?
Estimate the schedule using 12 episodes and an average 45-minute runtime.
Trailer
Overview
The television series The Holy Grail of Eris is a 2026 production that features a complex storyline with themes of betrayal, secrets, and power. According to the series' synopsis, the story revolves around Constance Grail, a viscount's daughter known for her honesty, who faces a dramatic turn of events. The series brings together Constance and Scarlett Castiel, a noblewoman thought to be dead, as they form an unlikely alliance. As they work together, they uncover a dark conspiracy lurking in the heart of high society. The series features a cast including Tomokazu Sugita, Shoya Chiba, Hika Tsukishiro, and Ayako Kawasumi. The title of the series, The Holy Grail of Eris, incorporates the term "holy", which is defined as exalted or worthy of complete devotion, according to Merriam-Webster. The series is listed on various online databases, including IMDb and The Movie Database, where viewers can find more information about the show.
Should you watch it?
“A betrayed noblewoman teams up with a vengeful spirit to expose a deadly conspiracy.”
- Intriguing dual-protagonist dynamic
- Rich gothic atmosphere
- Twists rooted in high-society intrigue
- Pacing may feel slow to some
- Supernatural elements might confuse viewers
You enjoy dark fantasy with strong female leads and ghostly alliances.
Contains themes of betrayal, execution, and supernatural possession; suitable for mature teens and adults.
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Cast
Episode guide
Season 1 · 12 episodes
Open the complete Season 1 guide →- E1 At the Grand Merillian Jan 8, 2026
- E2 An Extraordinary Villainess and an Ordinary Girl Jan 15, 2026
- E3 Respective Answers and Beginnings Jan 22, 2026
- E4 The Silent Ladies' Tea Party Jan 29, 2026
- E5 And the Cock Crows to Herald the Dawn Feb 5, 2026
- E6 The Command of the Goddess Feb 12, 2026
- E7 A Banquet of Insectivorous Plants Feb 19, 2026
- E8 Lily Orlamunde Feb 26, 2026
- E9 The Holy Grail of Eris Mar 5, 2026
- E10 For the Future Mar 12, 2026
- E11 Those Who Defy Fate Mar 19, 2026
- E12 The Final Chapter: At the Grand Merillian Mar 26, 2026
Frequently asked questions
Is The Holy Grail of Eris based on a book?
Yes, it is adapted from a novel series by Kujira Tokiwa.
How many episodes are there?
The series consists of 12 episodes.
Where can I watch it?
It aired in Japan and is available via various streaming platforms.
What genre is the show?
It blends dark fantasy, mystery, and supernatural drama.
Who are the main characters?
Constance Grail and Scarlett Castiel are the central figures.