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The Holy Grail of Eris

Anime · Manga · Hub · 1 Season

The Holy Grail of Eris

エリスの聖杯1 Season

It is common knowledge that nobles will do anything for power; lying, manipulation, and extortion are the usual tactics.

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About the story

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, bel…

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At a glance

The Holy Grail of Eris is an anime series from 2026. Its original run is complete. The catalogue records 12 episodes. This Kaidomi hub connects 2 releases, 33 characters and 12 listed episodes.

Full 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!

Catalogue score — Kaidomi never shows its own rating until the fans build it. In its genre, only 1,086 of 1,604 scored titles rank higher — the top 68%.

Score
6.9 / 10
Episodes
12
Status
Finished Airing
Members
24,838
Airing
8 Jan 2026 → 26 Mar 2026
Full 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!

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Anime and manga, side by side

2 of 2 connected titles

The cast

33 characters
Scarlet CastielScarlet CastielMainSayumi Suzushiro
Constance GrailConstance GrailMainKana Ichinose
Lily OrlamundeLily OrlamundeSupportingMao Ichimichi
Cecilia AdelbideCecilia AdelbideSupportingMaaya Uchida
Randolph UlsterRandolph UlsterSupportingYouhei Azakami
Abigail O'BrianAbigail O'BrianSupportingAyako Kawasumi
Aldous ClaytonAldous ClaytonSupportingShouya Chiba
Emilia GodwinEmilia GodwinSupportingSayuri Hara
MiriamMiriamSupportingAi Kayano
RebeccaRebeccaSupportingReina Kondou
View all · +23 the cast
  • Alienore ShibolaSupporting · 2 titles
  • Deborah DarkianSupporting · 1 titles
  • Enrique AdelbideSupporting · 1 titles
  • Kate LorraineSupporting · 2 titles
  • Lucia O'BrianSupporting · 2 titles
  • Pamela FrancisSupporting · 1 titles
  • SanSupporting · 1 titles
  • BrendaSupporting · 1 titles
  • Dominic HarmsworthSupporting · 1 titles
  • Kimberly SmithSupporting · 1 titles
  • Adolphus CastielSupporting · 2 titles
  • Aisha HuxleySupporting · 2 titles
  • Amelia HobbesSupporting · 1 titles
  • CessSupporting · 1 titles
  • Dylan BellesfordSupporting · 1 titles
  • Ernst AdelbideSupporting · 1 titles
  • John AdelbideSupporting · 1 titles
  • Margot TudorSupporting · 1 titles
  • Maximillian CastielSupporting · 1 titles
  • Neil BronsonSupporting · 2 titles
  • Rufus MaySupporting · 1 titles
  • SalvadorSupporting · 2 titles
  • Ulysses FarisSupporting · 1 titles
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