- "This is my new post, the marines at Hadley's Hope are under my command."
- ―Cpt. Brackett (from Alien: River of Pain)
Captain Demian Brackett was a member of the United States Colonial Marine Corps. He was commanding officer 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.
Brackett was one of several people to escape the colony, fleeing in a Weyland-Yutani science vessel with Lieutenant Paris, Dr. Mori and Luisa Cantrell. He was later debriefed on the incident, with his testimony regarding Facehugger lifespan being cited in The Weyland-Yutani Report.
Brackett was a former paramour of Anne but despite this history, maintained a friendly demeanor to both Anne and Russ. He was professional and moral, constantly at odds with the Weyland-Yutani staff at Hadley's Hope. Brackett was shown to be practical and believed in being cautious and prepared.