Season 4

Season 4 of Thunderbolt Fantasy is currently in production.

Production
Gen Urobuchi announced on Twitter that the script for season 4 had been drafted as of November 20, 2022. Shooting had yet to begin, but character designs were in development. On March 27, 2023, Pili confirmed that filming had officially begun.

According to comments shared on the official Twitter, Urobuchi described season 4 as "the point when the story reaches the climax," and he expressed a desire to "make the most of the heightened feeling that we're heading toward the end." He also mentioned that season 4 will explore the secrets of the main characters' pasts.