Rider-class Servant from Fate/Grand Order Arcade, debuted in the Babylon Singularity and designated as the Grand Rider. The depiction of the Biblical figure of the same name.
Right after being summoned, Noah was gravely injured by Queen Draco. He barely managed to survive by entrusting his Saint Graph to Captain Nemo. Before revealing his true identity, Noah pretends to be Nemo, calling himself "Captain" and strongly resembling an older version of him.
As he is not part of the Servant, do not tag him with the Nemo umbrella tag.