Sgt. Abraham Murdock is the first sergeant of Cartwright's Cavaliers human mercenary company.
From the Books: "After he finished surveying the area and making sure the guy with his guts all over the place was too busy trying to put them back in to be any threat, he looked down at Jim. He was not only imposing but older than Jim had realized at first. His face, neck, and what he could see of his chest showed lots of old scarring. His brow furrowed as he looked at Jim. 'You sure you’re okay?'” - Cartwright's Cavaliers, p. 64.