- Acting for Two:
- Japanese: Tomokazu Seki and Megumi Han does a double casting; the former voices Great and Alien Empera, the latter voices Sora and Justice.
- English: Ryan Drees voices both Zoffy and Joneus, Maxwell Powers to Max and Mebius, Jeff Manning for Titas and Andro Melos, Fuma and Hikari are done by Chris Wells, and Hannah Grace voices for Yullian and Mother of Ultra.
- The Other Darrin: A lot of examples in fact, but some of them are justified due to certain conditions.
- The second chapter focuses on a flashback in the Land of Light, way back in the Great Ultra War. Considering its timeline, the younger Father and Mother of Ultras and Zoffy were voiced by Hajime Iijima, Suzuko Mimori and Shunsuke Takeuchi respectively.
- Other Ultras also had their voice replaced: Haruka Tomatsu for Yullian (replacing Sayoko Hagiwara), Tomokazu Seki for Great, Toshiyuki Morikawa for Powered and lastly, Megumi Han for Justice.
- Much of the English cast from the previous miniseries returns, but only Taro, Grigio and Tregear retain their VAs, with Zero and Ribut being recast.
- Promoted Fanboy:
- Long time Ultra Series fans Megumi Han and Tomokazu Seki gets to fulfill their wishes in voicing Ultra Warriors, ironically replacing the original voices of the old ones.
- Back in February 2020, Junichi Suwabe announced through his radio show that he likes the Ultra Series since childhood and wishes that Tsuburaya Productions would hear his plea to make a voice appearance in Ultra Series.
- Relationship Voice Actor:
- A portion of the voice cast members are Mamoru Miyano, Yuki Ono, Megumi Han, Suzuko Mimori, Tomohiro Yamaguchi, Hajime Iijima and Kenta Matsumoto. All of them had voice appearances in Ultraman Geed, also an Ultra Series under Koichi Sakamoto.
- Ultraman Z, Ultraman Titas, Ultraman Justice and Ultraman Zero are Yuma Tsukumo, Rei Shingetsu/Vector, Rio Kamishiro/Merag and Daisuke Katagiri.
- Yullian, Ultraman Mebius, Ultraman Zero and Ultraman Belial are Saki Rukino, A-Drei, H-Neun, and Kyuma Inuzuka.
- Role Reprisal:
- Mamoru Miyano, Arisa Sonohara, Wataru Komada, Takuma Terashima, Satoshi Hino, Shota Hayama, Keiichi Nanba and Yuki Ono return as the Ultras; Zero, Grigio, Ribut, Taiga, Titas, Fuma, Hikari and Belial are nothing new, but honorable mentions goes to Taiyo Sugiura for Cosmos, Hatsunori Hasegawa to 80 for the first time in a decade and Jun Fukuyama to Mebius in a rare occasion.
- In the stageshow side, we have Tomokazu Sugita voicing the Breakout Villain Zett.
Trivia / Ultra Galaxy Fight: The Absolute Conspiracy