The Holy Grail of Eris: Story, Cast and Series Facts

Story and premise

Constance, the daughter to a Viscount whose only value is her honesty, and Scarlet Castiel, the most reviled villainess of the era who was sentenced to death ten years ago. When the two people who were never supposed to meet encountered one another at a night party, the story that should have ended with Scarlet's death began anew. Although their relationship only began out of mutual interest, they soon became true partners in an effort to unravel the mysteries of a grand conspiracy borne out of the past, that still has a vicious grip on the present.

Series details

• Title: The Holy Grail of Eris
• Format: Animation
• Language: Japanese
• Premiere date: 2026-01-08
• Status in TVmaze: To Be Determined
• Network listed by TVmaze: TBS
• Network country: Japan
• Typical episode runtime: 30 minutes
• TVMaze ID: 80466
• TVDB ID: 455709

Cast and credited roles

• Kana Ichinose — Constance Grail
• Sayumi Suzushiro — Scarlett Castiel
• Yōhei Azakami — Randolph Alastair
• M・A・O — Lilly
• Maaya Uchida — Cecilia
• Natsuki Hanae — Enrique
• Jun Fukuyama — Dominic Hemsworth

Seasons in the TVmaze catalogue

• Season 1: premiered 2026-01-08; final listed air date 2026-03-26.

Source and licence

Adapted from The Holy Grail of Eris on TVmaze. The synopsis is reproduced as plain text; catalogue facts, cast and season records are selected and reformatted. This adapted text is available under CC BY-SA 4.0, following the TVmaze API licence. Network and web-channel credits identify the service listed in this source; they do not establish current streaming availability.