The Holy Grail of Eris

Name: The Holy Grail of Eris
Genre: Animation, Mystery, Sci-Fi & Fantasy
Released: 2026-01-08
Rating: 7.4
Cast: Kana Ichinose, Sayumi Suzushiro, Yohei Azakami, Mao Ichimichi, Maaya Uchida

ENDED1 Season12 Episodes★ 7.4

The Holy Grail of Eris is an animated mystery series on MBS that premiered in 2026, ending after 1 season and 12 episodes.

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NetworkMBS

First AiredJan 8, 2026

Last AiredMar 26, 2026

GenreAnimation, Mystery, Sci-Fi & Fantasy

Original Titleエリスの聖杯

LanguageJapanese

CountryJapan

ProductionAshi Productions, Good Smile Film, Hakuhodo DY Music & Pictures

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.

WHERE TO WATCH

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Cast

Kana Ichinose

Constance Grail (voice)

Sayumi Suzushiro

Scarlett Castiel (voice)

Yohei Azakami

Randolph Ulster (voices)

Mao Ichimichi

Lily Orlamunde (voice)

Maaya Uchida

Cecilia Adelbide (voice)

Natsuki Hanae

Enrique Adelbide (voice)

Jun Fukuyama

Dominic Harmsworth (voice)

Seasons & Episodes1 season · 12 episodes

0% complete

E1At the Grand Merillian

Jan 8, 202623m★ 6.7

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

E2An Extraordinary Villainess and an Ordinary Girl

Jan 15, 202623m★ 7.0

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

E3Respective Answers and Beginnings

Jan 22, 202623m★ 7.0

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

E4The Silent Ladies' Tea Party

Jan 29, 202623m★ 6.7

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

E5And the Cock Crows to Herald the Dawn

Feb 5, 202623m★ 7.0

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

E6The Command of the Goddess

Feb 12, 202623m★ 7.0

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

E7A Banquet of Insectivorous Plants

Feb 19, 202624m★ 6.0

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

E8Lily Orlamunde

Feb 26, 202623m★ 6.3

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

E9The Holy Grail of Eris

Mar 5, 202623m★ 7.3

Scarlett possesses Constance to confront her own father.

E10For the Future

Mar 12, 202623m★ 7.3

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

E11Those Who Defy Fate

Mar 19, 202623m★ 6.7

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

E12The Final Chapter: At the Grand Merillian

Mar 26, 202623m★ 7.7

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

About The Holy Grail of Eris

The Holy Grail of Eris is an animation, mystery, sci-fi & fantasy series on MBS. The show first aired on Jan 8, 2026 and currently has 1 season and 12 episodes. The Holy Grail of Eris has ended. It has a rating of 7.4/10 based on 24 votes. The cast includes Kana Ichinose, Sayumi Suzushiro, Yohei Azakami, Mao Ichimichi, Maaya Uchida.