Ultraman Noa is an ancient Ultraman from the World of N who pursued his evil counterpart, Dark Zagi, throughout various universes and countless alien worlds, including the World of the Land of Light. He is an Ultra who has been active across the multiverse gaining the moniker of a legendary figure for his power and feats. Noa is also the true form of Ultraman the Next/Ultraman Nexus.

Ultraman Noa was a being of light who came from a distant galaxy. 20,000 years before Ultraman Nexus, he arrived on M80 of Messier 4 to fight against the Space Beasts that threatened the nebula's inhabitants. He was depicted to have bonded with various Dunamists as their will gave the silver giant the strength to fight. With Noa sending itself to a deep slumber, a race of aliens duplicated the silver giant into their own protector Zagi but their efforts backfired when it went rogue. The alien race detonated their sun in hopes of removing the mistake but this created a dimensional rift to Nebula M78 which Zagi proceeded to go to as Noa followed in pursuit.