A Klingon whose human appearance comes from the Augment virus, captured after sabotaging Enterprise.
Marab is one of the Klingons in the boarding party that attacks Enterprise in Affliction. Scans reveal that despite his human appearance he is a Klingon, one of those changed by the Augment-derived virus. He is shot, left behind and put in the brig, and his comrades' sabotage leaves Enterprise unable to drop below warp 5.
In Divergence, Marab beams down with Archer to the Qu'Vat colony to confront the Klingons holding Phlox. His altered features help explain why some Klingons look more human than others.