The Holy Grail of Eris
Eris no Seihai
What is The Holy Grail of Eris?
The Holy Grail of Eris is a supernatural drama that follows Constance Grail, the virtuous youngest daughter of a noble family renowned for their unwavering moral principles. When her fiancé's infidelity leaves her framed and abandoned by society, Constance becomes possessed by Scarlett Castiel, the vengeful spirit of a woman executed a decade ago for a crime she did not commit. This twelve-episode series aired during winter 2026 and has concluded its run.
The possession forces an unlikely partnership: Constance, bound by her family's commitment to truth and justice, must help Scarlett uncover who orchestrated her execution and exact vengeance against those responsible. The dynamic between the moral noblewoman and the vengeful spirit drives the narrative tension, blending romance, mystery, and supernatural elements. The series explores how far one will go when cornered by injustice and what price comes with seeking retribution.
This completed series appeals to viewers who enjoy character-driven fantasy with darker undertones and complex moral questions. The combination of court intrigue, supernatural mystery, and emotional stakes makes it suitable for audiences seeking drama beyond typical fantasy tropes, particularly those drawn to stories where protagonists must navigate between their principles and survival.
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)
Episode Schedule
Frequently Asked Questions
- What is the latest episode of The Holy Grail of Eris?
- The most recent episode is Episode 12, which aired on March 26, 2026.
- How many episodes does The Holy Grail of Eris have?
- The Holy Grail of Eris has 12 episodes.
- When did The Holy Grail of Eris come out?
- The Holy Grail of Eris premiered on January 8, 2026.
- Is The Holy Grail of Eris finished?
- The Holy Grail of Eris has finished airing and every episode has been released.