Ultraman Noa (ウルトラマンノア Urutoraman Noa) is an Ultraman from another dimension and the true identity of Ultraman Nexus. He pursued his evil counterpart, Dark Zagi, throughout various dimensions and countless alien worlds, including those of Nebula M78 universe. Ultraman Noa is for the moment the oldest known Ultraman in the entire multiverse, with over 350,000 years of age.
Noa was part of the Ultra N Project, which was meant to reboot the Ultraman franchise, Ultraman Noa was designed as a redesign of the original Ultraman. Ultraman Nexus was originally going to be named Ultraman Noa, but was later renamed to Ultraman Nexus.