Set two years after the events of Ultraman Trigger, an ultra-ancient threat re-emerges, leading to the return of Ultraman Trigger and Ultraman Zett to save the day, but all is not as it seems.
| Actor | Role |
|---|---|
 Raiga TerasakaKengo Manaka | Kengo Manaka |
 Kohshu HiranoHaruki Natsukawa | Haruki Natsukawa |
 Runa ToyodaYuna Shizuma | Yuna Shizuma |
 Shunya KanekoHijiri Akito | Hijiri Akito |
 Meiku HarukawaHimari Nanase | Himari Nanase |
 Tadashi MizunoTesshin Sakuma | Tesshin Sakuma |
 Katsuya TakagiSeiya Tatsumi | Seiya Tatsumi |
 Kei HosogaiIgnis | Ignis |
 Shin TakumaMitsukuni Shizuma | Mitsukuni Shizuma |
 Yuichi NakamuraRyuichi Tokioka | Ryuichi Tokioka |
 Akinori AndoLeyrah Ibra | Leyrah Ibra |
 Mao IchimichiMarluru (voice) | Marluru (voice) |
 Tasuku HatanakaUltraman Z (voice) | Ultraman Z (voice) |
| TTomoki OnoBeliarok (voice) | Beliarok (voice) |