Private Ankita Yousseff was a member of the United States Colonial Marine Corps. She was a member of the USCM security detail stationed at Hadley's Hope on Acheron in 2179. She was subsequently involved in combating the Xenomorph infestation at the colony.
Yousseff was part of a small group of disruptive Marines at the colony, led by Sergeant Marvin Draper, who were in conflict with their new commending officer, Captain Demian Brackett. She was captured by a Xenomorph as she and the few surviving Marines attempted to escape the planet aboard the hidden Weyland-Yutani ship.
- In the audio drama adaptation of Alien: River of Pain, Yousseff's rank is given as Sergeant, yet in the novel she is only a Private.