The Holy Grail of Eris (2026)

Overview · Where to watch · Cast & crew · Reviews

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.

• Released: 2026-01-08
• Genres: Animation, Mystery, Sci-Fi & Fantasy
• Seasons: 1, 12 episodes
• Network: 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
• Status: Ended
• TMDB rating: 7.4/10 from 24 votes

Top cast

• Kana Ichinose as Constance Grail (voice)
• Sayumi Suzushiro as Scarlett Castiel (voice)
• Yohei Azakami as Randolph Ulster (voices)
• Mao Ichimichi as Lily Orlamunde (voice)
• Maaya Uchida as Cecilia Adelbide (voice)
• Natsuki Hanae as Enrique Adelbide (voice)
• Jun Fukuyama as Dominic Harmsworth (voice)

Full cast & crew

Where to watch The Holy Grail of Eris

• United States: stream on Crunchyroll, Crunchyroll Amazon Channel
• United Kingdom: stream on Crunchyroll, Crunchyroll Amazon Channel
• India: stream on Crunchyroll, Sony Liv, Crunchyroll Amazon Channel
• Canada: stream on Crunchyroll Amazon Channel, Crunchyroll
• Australia: stream on Crunchyroll, Crunchyroll Amazon Channel

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