The upcoming fantasy drama The Holy Grail of Eris revealed a new key visual and announced a premiere date of January 8, 2026 at 23:56 JST in Japan. The theme songs were also detailed: Reina Washio performs the opening theme “Happy Ever After feat. YU-KA,” and Yukari Tamura performs the ending “Camellia.”

KEY VISUAL

The anime is directed by JUMPEI & MORITA (LOST SONG) at studio Ashi Productions. Kenichi Yamashita handles series composition, with character designs by Chie Kawaguchi (Fruits Basket animation director).

The cast includes:

• Sayumi Suzushiro as Scarlet Castiel

• Kana Ishinose as Constance Grail

• Yohei Azakami as Randolph Ulster

• M.A.O as Lily Orlamunde

Yen Press publishes the original light novel series by Kujira Tokiwa and Yu-nagi and describes the story:

Constance Grail is a viscount’s daughter with no outstanding traits besides her sincerity. After being publicly humiliated and falsely accused, her fate seems sealed—until the ghost of infamous noblewoman Scarlett Castiel appears. Executed ten years earlier for scandalous crimes, Scarlett offers Connie a deal: possession in exchange for enacting her revenge. What begins as salvation quickly becomes a dangerous pact with consequences far beyond a single ball.