The Holy Grail of Eris Gets Anime Adaptation

The Holy Grail of Eris light novel series is getting an anime adaptation. A teaser video and visual were unveiled, along with the main voice cast. Kana Ichinose will star as Constance “Connie” Grail, and Sayumi Suzushiro will voice Scarlett Castiel, both reprising their roles from the light novel’s previous drama CD.

The main cast’s voices are featured in the teaser trailer:

Hinase Momoyama, the artist responsible for the manga adaptation of the light novel, crafted an illustration to commemorate the announcement of the anime.

"The Holy Grail of Eris" is a Japanese light novel series authored by Kujira Tokiwa and illustrated by Yuunagi. It started serialization online in October 2017 on the user-generated novel publishing website Shōsetsuka ni Narō. SB Creative acquired the series, releasing four volumes from November 2019 to March 2022 under their GA Novel label.

The manga adaptation, illustrated by Hinase Momoyama, has been serialized on Square Enix’s Manga Up! website since November 2019. A new edition of the novel series, by the same author and illustrator, is set to be published under Drecom’s DRE Novels imprint starting in November 2024.

Yen Press has licensed the light novel for English readers and provides the following synopsis:

Constance Grail, the daughter of a viscount, is an ordinary girl distinguished only by her sincerity. This trait leaves her defenseless when she is robbed of her fiancé and wrongly accused of petty theft at a ball. As Connie faces her unjust punishment, she is approached by a ghost offering a deal. The apparition is Scarlett Castiel, a noblewoman once celebrated for her beauty and charm, who was executed a decade ago for her heinous acts. Accepting the ghost's offer, Connie is possessed by the notorious spirit, who swiftly retaliates against her accuser, sparing Connie from her grim destiny. However, making a pact without full knowledge of the terms can be perilous, as one may end up entwined with a ghost hell-bent on avenging her own foes.