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The Holy Grail of Eris

2026 • 7.1 • Animation, Mystery, Sci-Fi & Fantasy •

JP • Japanese

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.

Cast

Kana Ichinose

as Constance Grail (voice)

Sayumi Suzushiro

as Scarlett Castiel (voice)

Yohei Azakami

as Randolph Ulster (voices)

Mao Ichimichi

as Lily Orlamunde (voice)

Maaya Uchida

as Cecilia Adelbide (voice)

Natsuki Hanae

as Enrique Adelbide (voice)

Jun Fukuyama

as Dominic Harmsworth (voice)

Episodes

At the Grand Merillian

E1 23m

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

E2 23m

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

Respective Answers and Beginnings

E3 23m

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

The Silent Ladies' Tea Party

E4 23m

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

And the Cock Crows to Herald the Dawn

E5 23m

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

The Command of the Goddess

E6 23m

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

A Banquet of Insectivorous Plants

E7 24m

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

Lily Orlamunde

E8 23m

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

The Holy Grail of Eris

E9 23m

Scarlett possesses Constance to confront her own father.

For the Future

E10 23m

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

Those Who Defy Fate

E11 23m

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

The Final Chapter: At the Grand Merillian

E12 23m

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