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What is The Holy Grail of Eris about?
Betrayed by her fiancé's lover and sentenced to public execution, Constance Grail, a plain viscount's daughter known for her honesty, faces death—until a mysterious voice offers salvation. Scarlett Castiel, a noblewoman long thought dead, may be her only hope. Together, these unlikely allies uncover a dark conspiracy lurking in the heart of high society, where betrayal, secrets, and power collide.
Latest episode
S1 · Episode 12 — The Final Chapter: At the Grand Merillian · 2026-03-26
As the hour of Constance's execution approaches, Scarlett finds a crucial document and Cecilia makes her move.
- Genres
- Animation, Mystery, Sci-Fi & Fantasy
- First aired
- 2026-01-08
- Rating
- ★ 7.1 / 10
Top cast
- Kana Ichinose Constance Grail (voice)
- Sayumi Suzushiro Scarlett Castiel (voice)
- Yohei Azakami Randolph Ulster (voices)
- Mao Ichimichi Lily Orlamunde (voice)
- Maaya Uchida Cecilia Adelbide (voice)
- Natsuki Hanae Enrique Adelbide (voice)
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