Lieutenant Nolan is the main antagonist of the Star Wars: The Bad Batch episode "The Outpost".
He is an Imperial Army lieutenant who was assigned to oversee failing operations on the planet Barton-4 and repeatedly demonstrated xenophobic disgust and hatred towards the clone troopers.
His wrathful contempt towards the clones would ultimately cost him his life, as after blatantly letting Commander Mayday die right in front of Crosshair, Crosshair would finally snap and immediately killed him in retribution.