The Holy Grail of Eris backdrop
The Holy Grail of Eris poster

The Holy Grail of Eris

8.5
1 season
12 episodes
Returning Series
Animation
Mystery
Sci-Fi & Fantasy

Plot Summary

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.

First Aired:January 8, 2026
Last Aired:January 8, 2026
Episode Runtime:Unknown
Networks:
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

Cast & Characters

Seasons (1)

Season 1
7.0

Season 1

12 episodes

Aired: 2026

Production

Ashi Productions

Good Smile Film

Hakuhodo DY Music & Pictures

Drecom

TBS

LDH JAPAN

BS11

TEICHIKU ENTERTAINMENT

Medicos Entertainment

NewGin

THE KLOCKWORX

Square Enix

Bushiroad Move

DRE Pictures