Mac
Mac was one of the original raw recruits from Danny Franks unit, inscripted into Bad Company along with him and Trucker. He became close friends of Danny and managed to survive the final battle at Ararat along with Danny and Mad Tommy.
He was part of the 2nd incarnation of Bad Company, but just after recruting Sheeva, he stood on a shell which blew his arm off. In between Bad Company - The Bewilderness and Bad Company - The Krool Heart, Mac had an artificial arm put on.
Mac also survived the final attack on Krool and was there to witness Danny Franks take over the Krool Heart. He then parted ways with Danny and Kano.
Mac did not appear again in the series until "Terrorists". Mac was found fighting in "the Fight Pits". Kind of like a modern day arena. He had become a fearsome fighter, making mincemeat of his opponents. His mechanical arm now an awesome killing machine.
Bad Company dragged Mac out of there against his will to rejoin Bad Company. Something Mac was angry about at first.
Alas, Mac was killed in battle not long after. However Malarkey, Bad Company's medic, cut out his brain to preserve it in the hope of planting into another body. (Perhaps this was the answer to how other members of Bad Company managed to survive after death?)