TV
Finished
WINTER 2026
The Holy Grail of Eris
Chén Thánh của Eris
Score
6.90
Popularity
#23,586
Episodes
12
Duration
24 min
Synopsis
It is common knowledge that nobles will do anything for power; lying, manipulation, and extortion are the usual tactics. However, one family is exempt from this generalization: House Grail, whose main tenets are truth and integrity. The youngest daughter, Constance Grail, is just as moral as the rest of her family, believing in always doing the right thing and helping those in need.
However, these ideals do not help her when her fiancé cheats on her with another woman. Framed by his lover in the hope of her downfall, Constance has no one to hear her pleas for justice. Everyone turns a blind eye, save for one—the spirit of the infamous Scarlett Castiel—who possesses Constance and turns the tables on her accuser. However, this aid does not come without a price.
Ten years ago, Scarlett was executed for the attempted murder of Princess Cecilia. But this was actually a setup; as blunt and harsh as Scarlett could be, she would never stoop so low as to use poison. She has no idea who orchestrated her incrimination, but Scarlett demands that Constance—as the only one who can see her—help her exact revenge on all those who wronged her!
(Source: MAL Rewrite)
However, these ideals do not help her when her fiancé cheats on her with another woman. Framed by his lover in the hope of her downfall, Constance has no one to hear her pleas for justice. Everyone turns a blind eye, save for one—the spirit of the infamous Scarlett Castiel—who possesses Constance and turns the tables on her accuser. However, this aid does not come without a price.
Ten years ago, Scarlett was executed for the attempted murder of Princess Cecilia. But this was actually a setup; as blunt and harsh as Scarlett could be, she would never stoop so low as to use poison. She has no idea who orchestrated her incrimination, but Scarlett demands that Constance—as the only one who can see her—help her exact revenge on all those who wronged her!
(Source: MAL Rewrite)
Episode List (12)
✓ 12/12 Aired
Characters & Voice Actors (Seiyuu)
Scarlet Castiel
Main
Sayumi Suzushiro
Japanese
Constance Grail
Main
Kana Ichinose
Japanese
Cecilia Adelbide
Supporting
Maaya Uchida
Japanese
Randolph Ulster
Supporting
Youhei Azakami
Japanese
Lily Orlamunde
Supporting
Mao Ichimichi
Japanese
Enrique Adelbide
Supporting
Natsuki Hanae
Japanese
Dominic Harmsworth
Supporting
Jun Fukuyama
Japanese
Adolphus Castiel
Supporting
Kousuke Toriumi
Japanese
Kate Lorraine
Supporting
Hika Tsukishiro
Japanese
Deborah Darkian
Supporting
Chiwa Saitou
Japanese
Aisha Huxley
Supporting
Yuu Kobayashi
Japanese
Abigail O'Brian
Supporting
Ayako Kawasumi
Japanese
Rebecca
Supporting
Reina Kondou
Japanese
Lucia O'Brian
Supporting
Natsune Inui
Japanese
Ernst Adelbide
Supporting
Hiroki Touchi
Japanese
Miriam
Supporting
Ai Kayano
Japanese
Themes & Detailed Tags (22)
Female Protagonist
100%
Ghost
98%
Royal Affairs
96%
Revenge
95%
Villainess
92%
Body Swapping
90%
Detective
90%
Tragedy
90%
Conspiracy
88%
Anti-Hero
85%
Politics
82%
Ojou-sama
80%
Historical
80%
Drugs
80%
Arranged Marriage
79%
Criminal Organization
73%
Shoujo
71%
Heterosexual
57%
Foreign
55%
Age Gap
50%
Ensemble Cast
46%
Suicide
40%
Streaming Platforms
Anime Information
Genres
Studios
Ashi Productions
Producers
Hakuhodo DY Music & Pictures, BS11, Square Enix, TBS, KLOCKWORX, Medicos Entertainment, Teichiku Entertainment, Good Smile Film, Bushiroad Move, newgin, Drecom, LDH JAPAN
Aired Date
08/01/2026
to 26/03/2026
Source
LIGHT_NOVEL
Production Staff
14
Yukari Tamura
Theme Song Performance
Nobuhito Sue
Art Director
Yuriko Sano
Editing
Jun Yukawa
Sub Character Design
Kenichi Yamashita
Script
Reina Washio
Theme Song Performance
Morita to Jumpei
Director
Yuuko Kamahara
Director of Photography
Aiko Yamagami
Color Design
Yuuichi Morita
Sound Director
Yuunagi
Original Character Design
Chie Kawaguchi
Character Design
YU-KA
Theme Song Performance
Kujira Tokiwa
Original Story