Eris’ Training Arc is one of those moments in Mushoku Tensei that readers of the light novels have long awaited to see animated, and every new detail released by the production team makes it feel closer. The third trailer for Season 3 focused on introducing the season’s ending theme, and the choice is significant: Mika Nakashima provides the vocals for the theme that will close each episode. Premiere confirmed for July 5, 2026.

The closing theme is called “Inori, Owareba”, with lyrics and music written by Shinoda, guitarist and vocalist of the rock band Hitorie. This isn’t the first time Hitorie has participated in the series: their second opening theme for Season 2 was also composed by them, so there’s a musical continuity that fans of the group will notice. On the opening side, Yuiko Ohara returns with “Ketsui no Uta”, adding another chapter to her long history with the franchise, having performed multiple themes across previous seasons.

The season will adapt the Eris Training Arc, which begins in the thirteenth volume of the original light novel. This arc focuses on Eris’s growth and development within the series’ broader narrative.

Voice Cast

New Additions

• Haruka Tomatsu as Nina Farion. (The unmistakable Asuna Yuuki in Sword Art Online and Zero Two in Darling in the FranXX).
• Tetsu Inada as Gal Farion. (The voice of Gigantomachia in My Hero Academia and the Great Father in Dragon Ball Super).

Previously Confirmed Cast

• Ai Kakuma as Eris Boreas Greyrat. (Isuzu Sento in Amagi Brilliant Park and Rossweisse in High School DxD).

About Mushoku Tensei

Mushoku Tensei: Jobless Reincarnation (Mushoku Tensei: Isekai Ittara Honki Dasu) is a light novel by Rifujin na Magonote that began as a web novel on Shosetsuka ni Naro between 2012 and 2015, before being published in print under Kadokawa’s MF Books label in 2014. The story follows a 34-year-old man who, after dying in an accident, wakes up reincarnated as a baby in a world of swords and magic, retaining all memories of his previous life. Considered one of the works that defined and popularized the modern isekai genre, the anime adaptation premiered in 2021 and has aired in two seasons, building a solid audience that approaches this third installment with high expectations.

Is the Eris Training Arc what you were most looking forward to for this season, or is there another moment from the novel you want to see animated before that?