S. Holmes

S.holmes is a combat marine in the Mars city marine HQ. He was stationed there by order of Sergeant Kelly to guard the HQ. When the marine gets there, Holmes tells him that : If you dont get to the HQ , Sergeant Kelly will teach you a lesson . Holmes was in Mars city when the Delta Labs Teleporter failured and created a gateway to hell. Holmes lost his Helmet during the combat. He can be found when the Doomguy needs to go to Marine HQ, and he aparently has been hurt.

Trivia
S.Holmes may be a name parody of Sherlock Holmes. Its helmet can be seen in the floor near the HQ and the Infirmary.