The Holy Grail of Eris
Eris no Seihai
Genres
- Mystery
- Supernatural
Tags
all 14- Main CastFemale Protagonist100
- TraitsGhost97
- OtherRoyal Affairs95
- DramaRevenge94
- TraitsVillainess91
- OtherPolitics80
- Main CastAnti-Hero79
- TraitsDetective79
- TimeHistorical75
- DemographicShoujo66
- RomanceHeterosexual63
- TraitsOjou-sama60
- SceneForeign40
- Main CastEnsemble Cast20
Genres: Mystery, Supernatural. Tags: Female Protagonist, Ghost, Royal Affairs, Revenge, Villainess, Politics, Anti-Hero, Detective, Historical, Shoujo, Heterosexual, Ojou-sama.
#4770
Ranked
#3885
Popularity
77
Favorites
16.2K
Members
#20
This Season
Popular TV
#24
This Season
Rated TV
- Premiered
- Winter 2026
- Aired
- Jan 8, 2026 – Mar 26, 2026
- Broadcast
- Thursday · 23:56:00
- Duration
- 23 min
- Time to Complete
- ~4h 36m
- Studio
- Ashi Productions
Alternative Titles
jaエリスの聖杯
en-x-romajiEris no Seihai
thผีนางร้ายจับคู่สาวซื่อ รื้อคดีใหญ่
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, thes
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!
[Written by MAL Rewrite]
Read moreRead less
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, thes
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! [Written by MAL Rewrite]
Where to Watch
Platform Scores
MAL
6.99
AniList
67 / 100
Kitsu
72 / 100
AniList Trend
1,684
Episode Guide
Aired so far: 11 / 12
Main Story
11 / 12
92%
Latest Aired
Episode 11
Remaining
1 eps
11 / 12
Trailer

Theme Songs
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1
Status Breakdown
Tags
Shows how closely each tag relates to this animeShow spoiler tags8
Recommendations
Information
- Type
- TV
- Status
- Airing
- Premiered
- Winter 2026
- Aired
- Jan 8, 2026 – Mar 26, 2026
- Broadcast
- Thursday · 23:56:00
- Episodes
- 11 / 12
- Duration
- 23 min
- Time to Complete
- ~4h 36m
- Studio
- Ashi Productions
Alternative Titles
jaエリスの聖杯
en-x-romajiEris no Seihai
thผีนางร้ายจับคู่สาวซื่อ รื้อคดีใหญ่