The official website for Production I.G's Ginga Eiyuu Densetsu: Die Neue These - Seiran film trilogy revealed more cast members and two promotional videos on Monday. The films will each premiere in Japan on September 27, October 25, and November 29, respectively.

Cast
Otho von Braunschweig: Jirou Saitou (One Punch Man)
Wilhelm von Littenheim: Eiji Hanawa (Shoukoku no Altair)
Alfred von Landsberg: Masayoshi Sugawara (Shirobako)
Grand Bishop: Ikkyuu Juku (Koukaku Kidoutai: Stand Alone Complex)
Legrange: Yasuhiro Mamiya (Dragon Ball Super)
Bronze: Kousuke Takaguchi (Soukyuu no Fafner: Dead Aggressor - Exodus)
Bernhard von Schneider: Daisuke Hirakawa (Lord El-Melloi II Sei no Jikenbo: Rail Zeppelin Grace Note)
Arthur von Streit: Kenji Yamauchi (Naruto: Shippuuden)
Anton Fellner: Isshin Chiba (Mobile Suit Gundam SEED)
Leopold Schumacher: Hisanori Koyatsu (Gokusen)
Dawson: Takaya Kuroda (Durarara!!)
Kubersly: Toshitsugu Takashina (Uchuu Kyoudai)
Nguyen Van Huu: Kenta Miyake (Boku no Hero Academia)
Baghdash: Shigeru Ushiyama (Kono Sekai no Katasumi ni)
Boris Konev: Masami Kikuchi (Tenchi Muyou!)
Hildegard von Mariendorf: Kana Hanazawa (Sora yori mo Tooi Basho)
Flegel: Toru Furuya (Bishoujo Senshi Sailor Moon)
Arthur Lynch: Issei Futamata (Maison Ikkoku)

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Ginga Eiyuu Densetsu: Die Neue These - Seiran serves as the second season of the new anime adaptation of Yoshiki Tanaka's space sci-fi novels. The films will have a duration of four episodes.

Director Shunsuke Tada ("Bungaku Shoujo" Movie) is reprising his role to helm the trilogy at Production I.G and Noboru Takagi (Durarara!!) is handling the series composition. Youko Kikuchi (Phantom: Requiem for the Phantom), Iwao Teraoka (Nihon Animator Mihonichi episode 21 character design), Kei Tsushima (Kuroko no Basket animation director) are returning to design the characters, and Takayuki Goto (Blood-C) is serving as chief animation director.

Source: Cho! Animedia