Ultraman Noa is the first in the "Ultra N Project," an attempt by Tsuburaya Pro. to revitalize Ultraman. To date this Ultraman has only appeared in a live stage show. He has one nemesis, Dark Zagi, a "negative" version of Noa.
This Noa has nothing to do with the "Ultraman Noah" that apparently rescued an ancient civilization from the monster Antlar and was worshipped by the civilization until Ultraman redefeated the monster using a weapon left behind by the prehistoric Ultra.