The Holy Grail of Eris
2026•TV-14•1 Seasons•12 Episodes•7.1•Ended
AnimationMysterySci-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.
Network
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
Origin
JP
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)
Jun Fukuyama
Dominic Harmsworth (voice)
Episodes
Recommended
7.5
Slayers
1995
8.5
Black Clover
2017
6.1
Occultic;Nine
2016
7.6
An Observation Log of My Fiancée Who Calls Herself a Villainess
2026
8.3
Pass the Monster Meat, Milady!
2025
7.6
Farming Life in Another World
2023
7.5
The Dark History of the Reincarnated Villainess
2025
7.8
Rozen Maiden
2004
6.6
The Foolish Angel Dances with the Devil
2024
7.7
The Witch and the Beast
2024
7.6
Easygoing Territory Defense by the Optimistic Lord
2026
8.8
Witch Hat Atelier
2026
7.6
The Most Notorious "Talker" Runs the World's Greatest Clan
2024
7.3
Gankutsuou
2004
7.5
The Gorilla God's Go-To Girl
2025
7.1
The "Hentai" Prince and the Stony Cat
2013
8.4
Nina the Starry Bride
2024
7.8
The Strongest Job Is Apparently Not a Hero or a Sage, But an Appraiser (Provisional)!
2026
7.3
Reincarnated as a Sword
2022
7.4
As a Reincarnated Aristocrat, I'll Use My Appraisal Skill to Rise in the World
2024
Similar Shows
5
From Overshadowed to Overpowered: Second Reincarnation of a Talentless Sage
2026
Perfect Addiction
2026
7.4
Sketchbook ~full color's~
2007
6.4
MAKE MY DAY
2023
8.3
My First Girlfriend Is a Gal
2017
6.2
Hina Logic: From Luck & Logic
2017
7.4
Fate/Apocrypha
2017
8.1
Kakegurui
2017
6.1
16bit Sensation: Another Layer
2023
7.3
Magical Warfare
2014
6.2
Gravion
2002
6.9
E's Otherwise
2003
6.3
Divergence Eve
2003
5.5
Fantasista Doll
2013
7.3
Restaurant to Another World
2017
7.9
GAMERS!
2017
7.5
The Vexations of a Shut-In Vampire Princess
2023
7.5
Zom 100: Bucket List of the Dead
2023
5
My Big Sister Arrived
2014
5.5
Mobile Suit Gundam: Twilight AXIS
2017