

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
Cast
Seasons (1)
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






