The Holy Grail of Eris

Name: The Holy Grail of Eris
Genre: Animation, Mystery, Sci-Fi & Fantasy
Released: 2026-01-08
Rating: 7.417
Cast: Kana Ichinose, Sayumi Suzushiro, Yohei Azakami, Mao Ichimichi, Maaya Uchida

7.4

2026

N/A

Ended

Season

Episode

Watch Now

Overview

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.

Animation Mystery Sci-Fi & Fantasy

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)

Production

Ashi Productions

Language

Japanese

Seasons

1 Season · 12 Episodes

Network

MBS

About The Holy Grail of Eris (2026)

First broadcast in 2026, The Holy Grail of Eris is a animation, mystery and sci-fi & fantasy show aired by MBS. The main cast includes Kana Ichinose, Sayumi Suzushiro, Yohei Azakami, Mao Ichimichi and Maaya Uchida. The show has 1 season and 12 episodes and is currently listed as "Ended" with the most recent episode airing on March 26, 2026. Viewers rate it 7.4/10 on TMDB from 24 votes.

Every season and episode of The Holy Grail of Eris is available to stream free in HD on MyFlixer. Pick a season and episode above, press Watch Now and choose a server. Fans of the show also watch Slayers, Occultic;Nine and Black Clover.

Where to watch The Holy Grail of Eris Season 1 Episode 1 online free →