Shadow is a member of S.O.U.N.D. and a former member of Task Force 141.
Shadow is a Task Force 141 member that served with Ghost and Roach on the level Loose Ends but was shot in the leg by one of Shepherd's snipers, he survived. He then escaped with Archer and Toad to extraction and left Russia. Soon the three met up with Sgt. Ex, and joined a PMC he created called S.O.U.N.D.
"Archer, Toad, do you copy I repeat, do you copy, damn it!'~~ Shadow, when he witnesses the exacution of Roach and Ghost and trying to get Archer and Toad to respond.