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The Holy Grail of Eris

The Holy Grail of Eris

The Holy Grail of Eris

2026 1 Seasons 12 Episodes ⭐ 7.1 Animation Mystery Sci-Fi & Fantasy

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.

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

EP 1

At the Grand Merillian

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

EP 2

An Extraordinary Villainess and an Ordinary Girl

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

EP 3

Respective Answers and Beginnings

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

EP 4

The Silent Ladies' Tea Party

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

EP 5

And the Cock Crows to Herald the Dawn

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

EP 6

The Command of the Goddess

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

EP 7

A Banquet of Insectivorous Plants

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

EP 8

Lily Orlamunde

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

EP 9

The Holy Grail of Eris

Scarlett possesses Constance to confront her own father.

EP 10

For the Future

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

EP 11

Those Who Defy Fate

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

EP 12

The Final Chapter: At the Grand Merillian

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

Popular 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)