Key of the Twilight for Alive-de Seven, first part of the trilogy focusing on the JENOVA Project.
The cover represents Hojo as a young scientist and JENOVA. I believe she looked more like a Cetra when Gast found her and took a little time to degenerate, partly because of the experiments Gast and Hojo did on her when they found out she wasn’t a Cetra. The iron mask was then added to avoid a maximum of contacts of any kind with her, visual contact, physical contact etc… as it was considered too dangerous.
This picture is based on a famous scene from the game that fans may recognize, I did it on purpose to create some sort of déjà vu, different character, different time, same fascination.

This fanfiction isn’t very long, only 14 short chapters.