The official website and X (formerly Twitter) account for Kujira Tokiwa's The Holy Grail of Eris light novel series today revealed that an anime adaptation is in production. A teaser trailer, teaser visual and commemorative illustrations by both manga version artists were also unveiled, along with the casting of Kana Ichinose (Fern in Frieren: Beyond Journey's End ) as Constance Grail and Sayumi Suzushiro (Nijika in Bocchi The Rock! ) as Scarlet Castiel — reprising their respective roles from a prior promotional video . A release date and production staff for the anime were not announced at the time of reporting. Teaser Visual Art by Hinase Momoyama Art by S.Kosugi Related: Blade & Bastard Anime Announced Yen Press publishes an official English version of the light novels and describes the story: Lucia O’Brian is heading to the Republic of Soldita to visit a friend, and Connie, Randolph, and a certain glamorous ghost wind...