Sergeant Marvin Draper was a member of the United States Colonial Marine Corps. He was a member of the USCM security detail stationed at Hadley's Hope on Acheron in 2179. He was subsequently involved in combating the Xenomorph infestation at the colony.
Draper was the ringleader of a small group of disruptive Marines at the colony who were in conflict with their new commending officer, Captain Demian Brackett. He was killed during the Xenomorphs' final assault on the surviving human colonists.
- It seems highly likely that Sergeant Draper is supposed to be the same man as Drapers, briefly featured in the comic Aliens: Newt's Tale. In the comic, Drapers is seen reporting from within the Xenomorph Hive when the group attempting to rescue the captured colonists is ambushed; while Sergeant Draper makes no such radio call in the novel, he is part of this ill-fated rescue mission. It therefore seems likely the two men are the same person, with the slight difference in name being either an accidental or intentional change.