- "This is my new post, the marines at Hadley's Hope are under my command."
- ―Brackett to Anne Jorden
Captain Demian Brackett was a member of the United States Colonial Marine Corps. He was commanding officer of the unit stationed at Hadley's Hope on Acheron in 2179. He was subsequently involved in combating the Xenomorph infestation at the colony.
Brackett is mentioned in the Weyland-Yutani report, he gives testimony on how long a Facehugger can live for.