Mushoku no Tensei - Eris GaidenMushoku Tensei: Jobless Reincarnation ~Eris Sharpens Her Fangs~; 無職転生～エリスは本気で牙を砥ぐ～; Mushoku Tensei ~Eris wa Honki de Kiba o Togu~; Mushoku Tensei ~Eris ha Honki de Kiba wo Togu~; Jobless Reincarnation ~Eris Seriously Sharpens Her Fangs~; Mushoku Tensei: Eris Gaiden; 無職轉生～艾莉絲拿出真本事鍛磨利牙～; Реинкарнация Безработного - История Эрис; Mushoku Tensei - L'Épée d'Eris

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. This is a spinoff of Mushoku Tensei, which splinters off from the main manga at around chapter 51 (volume 6 of the light novel, first season of the anime).