The official website for the Thunderbolt Fantasy franchise revealed on Friday that the puppet-show series will receive a new "video work" this year titled Thunderbolt Fantasy – Seiyū Genka. The new work will be set in the land of Xi-You (Seiyū), and will center on the character Lang Wu Yao (Rōfu Yō in Japanese) and his past. The new work is separate from the earlier announced third season of the show.
The site also showed a new character named Mu Tian Ming (Mutsuten Mei in Japanese, right in picture below), alongside the design for Lang Wu Yao (left). Satoru Minamoto designed Mu Tian Ming, while Shinov Mimori designed Lang Wu Yao.
The first season premiered in July 2016, and the Thunderbolt Fantasy: The Sword of Life and Death film opened in Japan in December 2017. The second season premiered in Japan last October. Crunchyroll streamed all three installments.
Gen Urobuchi (Madoka Magica, Fate/Zero, Psycho-Pass, Aldnoah.Zero) was credited with the first season's original work, and he also wrote the scripts and served as chief supervisor. Nitroplus was credited with the character designs, and Good Smile Company was credited as the "modeling adviser." PILI Multimedia Inc., a well-known hand puppet drama production company in Taiwan, produced the series. Hiroyuki Sawano (Attack on Titan, Aldnoah.Zero, Kabaneri of the Iron Fortress) composed the music and Yoshikazu Iwanami was the sound director.
Source: Thunderbolt Fantasy's website