The Japanese light novel The Holy Grail of Eris (Erisu no Seihai), written by Kujira Tokiwa and illustrated by Yuunagi, had its anime confirmed this Sunday (20).
Therefore, and from all indications, the premiere of the anime should take place sometime in 2025.
Synopsis The Holy Grail of Eris:
Connie, a simple and common young viscountess, is saved from a difficult situation, caused by the mistreatment of an evil noblewoman, by the ghost of a mysterious woman. This spirit is Scarlet Castiel, a duchess executed ten years ago and who became known as a legendary villain! As a form of retribution, Connie is forced to find out who the real culprit was for sending Scarlet to execution. However, as she carries out secret investigations, enters into a fake engagement and even faces off against great nobles, she begins to unravel a conspiracy much bigger than she imagined...
Online serialization began in October 2017 on the user-generated novel website Shōsetsuka ni Narō. Later being acquired by SB Creative, which published three volumes from November 2019 to October 2020 under the GA Novel imprint.
Finally, a manga adaptation with art by Hinase Momoyama was serialized online by Square Enix's Manga Up! website since November 2019.
Source: Official Website