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
Stream
Stream
Stream
Stream
Stream
Stream
Stream
Stream
Stream
Stream
Stream
Rent
Stream
Stream
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.
Ask the Vault
Ask anything about The Holy Grail of Eris — answers are spoiler-safe.
Your verdict
Is The Holy Grail of Eris worth watching?
Cast
Episode guide
Spoiler-Safe Browsing Progress
Season 1 · 12 episodes
Open the complete Season 1 guide & lore primer →- E1 At the Grand Merillian Mytharc Jan 8, 2026
- E2 An Extraordinary Villainess and an Ordinary Girl Core Jan 15, 2026
- E3 Respective Answers and Beginnings Core Jan 22, 2026
- E4 The Silent Ladies' Tea Party Core Jan 29, 2026
- E5 And the Cock Crows to Herald the Dawn Core Feb 5, 2026
- E6 The Command of the Goddess Core Feb 12, 2026
- E7 A Banquet of Insectivorous Plants Core Feb 19, 2026
- E8 Lily Orlamunde Mytharc Feb 26, 2026
- E9 The Holy Grail of Eris Core Mar 5, 2026
- E10 For the Future Core Mar 12, 2026
- E11 Those Who Defy Fate Mytharc Mar 19, 2026
- E12 The Final Chapter: At the Grand Merillian Mytharc 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.