The Holy Grail of Eris

The Holy Grail of Eris - S01

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TV

Nobles will stop at nothing to gain power-lying, manipulating, and blackmailing are standard tools in their arsenal. Yet one family stands apart: House Grail, known for its unwavering commitment to truth and honor. Constance Grail, the youngest daughter, embodies these values, always striving to do what’s right and aid those in need. But her noble ideals offer no protection when her fiancé betrays her with another woman. Framed by his lover in a plot to ruin her, Constance finds herself abandoned, with no one willing to listen to her cries for justice. Only one comes to her aid-the vengeful spirit of Scarlett Castiel, a woman infamous for her alleged attempt to murder Princess Cecilia a decade ago. Scarlett possesses Constance, turning the tables on her accuser. Yet this help isn’t free. Scarlett’s execution was a sham-she may have been brash and ruthless, but she would never resort to poison. She still doesn’t know who framed her, but now that Constance is the only one who can see her, Scarlett demands repayment: together, they must hunt down everyone responsible for her downfall.

Overview:

Nobles will stop at nothing to gain power-lying, manipulating, and blackmailing are standard tools in their arsenal. Yet one family stands apart: House Grail, known for its unwavering commitment to truth and honor. Constance Grail, the youngest daughter, embodies these values, always striving to do what’s right and aid those in need. But her noble ideals offer no protection when her fiancé betrays her with another woman. Framed by his lover in a plot to ruin her, Constance finds herself abandoned, with no one willing to listen to her cries for justice. Only one comes to her aid-the vengeful spirit of Scarlett Castiel, a woman infamous for her alleged attempt to murder Princess Cecilia a decade ago. Scarlett possesses Constance, turning the tables on her accuser. Yet this help isn’t free. Scarlett’s execution was a sham-she may have been brash and ruthless, but she would never resort to poison. She still doesn’t know who framed her, but now that Constance is the only one who can see her, Scarlett demands repayment: together, they must hunt down everyone responsible for her downfall.

Aired:Jan 08, 2026
Episodes:12
Networks:MBS, TBS, CBC, Tulip Television, SBC, BSN, tys, NBC, HBC, RKK, i-Television, SBS, IBC, BSS, MRO, OBS, TUF, RSK, TUY, tbc, RKB, KUTV, RBC, UTY, RCC, MRT, ATV, MBC
Country: Japan

Seasons (1)

Episodes (12)

1. At the Grand Merillian2. An Extraordinary Villainess and an Ordinary Girl3. Respective Answers and Beginnings4. The Silent Ladies' Tea Party5. And the Cock Crows to Herald the Dawn6. The Command of the Goddess7. A Banquet of Insectivorous Plants8. Lily Orlamunde9. The Holy Grail of Eris10. For the Future11. Those Who Defy Fate12. The Final Chapter: At the Grand Merillian

Characters & Voice Actors

Kana Ichinose
CharacterConstance Grail (voice)
Voice ActorKana Ichinose
Sayumi Suzushiro
CharacterScarlett Castiel (voice)
Voice ActorSayumi Suzushiro
Yohei Azakami
CharacterRandolph Ulster (voices)
Voice ActorYohei Azakami
Mao Ichimichi
CharacterLily Orlamunde (voice)
Voice ActorMao Ichimichi
Maaya Uchida
CharacterCecilia Adelbide (voice)
Voice ActorMaaya Uchida
Natsuki Hanae
CharacterEnrique Adelbide (voice)
Voice ActorNatsuki Hanae
Jun Fukuyama
CharacterDominic Harmsworth (voice)
Voice ActorJun Fukuyama