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Series · 2026 · Animation

The Holy Grail of Eris

★7.4 2026 1 Season TV-MA

Betrayed by her fiancé's lover and sentenced to public execution, Constance Grail, a plain viscount's daughter known for her honesty, faces death—until a mysterious voice offers salvation. Scarlett Castiel, a noblewoman long thought dead, may be her only hope. Together, these unlikely allies uncover a dark conspiracy lurking in the heart of high society, where betrayal, secrets, and power collide.

Seasons & episodes

1 season · 12 episodes

At the Grand Merillian

Episode 01

At the Grand Merillian

Jan 8, 2026 · 23 min

Constance Grail attends a party only to find her fiancé kissing another woman and herself accused of a crime.

An Extraordinary Villainess and an Ordinary Girl

Episode 02

An Extraordinary Villainess and an Ordinary Girl

Jan 15, 2026 · 23 min

The ghostly Scarlett demands that Constance repay her help by avenging her death.

Respective Answers and Beginnings

Episode 03

Respective Answers and Beginnings

Jan 22, 2026 · 23 min

Constance and Scarlett follow a tip to a masked ball with a sinister reputation.

The Silent Ladies' Tea Party

Episode 04

The Silent Ladies' Tea Party

Jan 29, 2026 · 23 min

Constance receives a summons from an investigative committee determined to put her on trial.

And the Cock Crows to Herald the Dawn

Episode 05

And the Cock Crows to Herald the Dawn

Feb 5, 2026 · 23 min

Constance's carriage suffers a shocking attack and an even more shocking rescue.

The Command of the Goddess

Episode 06

The Command of the Goddess

Feb 12, 2026 · 23 min

Both Constance and Randolph uncover fresh clues, but Lily's last message remains shrouded in mystery.

A Banquet of Insectivorous Plants

Episode 07

A Banquet of Insectivorous Plants

Feb 19, 2026 · 24 min

Daeg Gallus contrives to murder Aisha before she can reveal the truth and cast suspicion on Abigail.

Lily Orlamunde

Episode 08

Lily Orlamunde

Feb 26, 2026 · 23 min

Constance, Scarlett, and Randolph discover a letter that reveals Lily's struggle and the truth she uncovered.

The Holy Grail of Eris

Episode 09

The Holy Grail of Eris

Mar 5, 2026 · 23 min

Scarlett possesses Constance to confront her own father.

For the Future

Episode 10

For the Future

Mar 12, 2026 · 23 min

Constance, Scarlett, and Randolph pursue the kidnapped Ulysses and stumble into a shootout.

Those Who Defy Fate

Episode 11

Those Who Defy Fate

Mar 19, 2026 · 23 min

Constance is jailed on her own testimony and given a sentence of death.

The Final Chapter: At the Grand Merillian

Episode 12

The Final Chapter: At the Grand Merillian

Mar 26, 2026 · 23 min

As the hour of Constance's execution approaches, Scarlett finds a crucial document and Cecilia makes her move.

About the series

The Holy Grail of Eris poster
Audience score
★ 7.4 /10

based on 24 votes

Synopsis

Betrayed by her fiancé's lover and sentenced to public execution, Constance Grail, a plain viscount's daughter known for her honesty, faces death—until a mysterious voice offers salvation. Scarlett Castiel, a noblewoman long thought dead, may be her only hope. Together, these unlikely allies uncover a dark conspiracy lurking in the heart of high society, where betrayal, secrets, and power collide.

AnimationMysterySci-Fi & Fantasy

Cast

7 principal cast

Kana Ichinose

Kana Ichinose

Constance Grail (voice)

Sayumi Suzushiro

Sayumi Suzushiro

Scarlett Castiel (voice)

Yohei Azakami

Yohei Azakami

Randolph Ulster (voices)

Mao Ichimichi

Mao Ichimichi

Lily Orlamunde (voice)

Maaya Uchida

Maaya Uchida

Cecilia Adelbide (voice)

Natsuki Hanae

Natsuki Hanae

Enrique Adelbide (voice)

Jun Fukuyama

Jun Fukuyama

Dominic Harmsworth (voice)

Where to watch The Holy Grail of Eris

The Holy Grail of Eris is available to stream on Flicksy via 6 verified sources, aggregated from publicly available embed providers. The animation has 1 season and 12 total episodes, rated 7.4/10 by 24 viewers.

Frequently asked

How many seasons does The Holy Grail of Eris have?

The Holy Grail of Eris has 1 season with 12 episodes in total.

Is The Holy Grail of Eris still on the air?

The Holy Grail of Eris has ended and is no longer in production.

What network airs The Holy Grail of Eris?

The Holy Grail of Eris airs on MBS, TBS, CBC, Tulip Television, SBC, BSN, tys, NBC, HBC, RKK, i-Television, SBS, IBC, BSS, MRO, OBS, TUF, RSK, TUY, tbc, RKB, KUTV, RBC, UTY, RCC, MRT, ATV, MBC.

When did The Holy Grail of Eris first air?

The Holy Grail of Eris first aired on January 8, 2026.

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