The Holy Grail of Eris

Ashi Productions Winter 2026
MysterySupernaturalVillainess
7.1
Quality Score
0.28 (Mild Positive)
Audience Mood
6 / 10
Controversy
16,074
MAL Ratings

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! [Written by MAL Rewrite]

Audience Consensus

Audience opinions on 'Eris no Seihai' are mixed. Many praise the strong female leads, intricate mystery, and historical elements. However, the convoluted plot, rushed pacing, and subpar animation quality are major points of criticism. Some viewers enjoyed the show despite its flaws, while others found the story too ambitious for its limited runtime.

Strengths

  • Strong and assertive female leads with compelling dynamic
  • Complex and diverse characters with genuine agency
  • Intriguing plot twists and a complete story
  • Historically authentic costumes and props
  • The series tackles dark and messed up topics like human trafficking, drug use, sexual assault etc

Weaknesses

  • Convoluted plot with excessive world-building and info dumping
  • Rushed and disjointed pacing due to limited episodes
  • Underdeveloped supporting characters
  • Mediocre animation and subpar production values
  • Forced or underdeveloped romance
  • Plot holes and convenient plot devices in the later episodes
Available on: Crunchyroll, Bilibili TV (availability varies by region)