Mushoku Tensei: Jobless Reincarnation ~Eris Sharpens Her Fangs~

Eris takes center stage in this spinoff!

Eris Boreas Greyrat is a former noble girl, who one day was transported to the other side of the world with her cousin Rudeus. She grew as a swordswoman, but ultimately was unable to save Rudy as he was nearly killed. Deciding that she wants to be someone who can support him rather than the other way around, Eris decides to leave Rudeus and go on her own journey.

Note: It begins at around Chapter 51 of the main manga, Volume 6 of the light novel, and Season 1 of the anime.