Ellen Ripley: After surviving the xenomorph attack that killed her crewmates, Ellen Ripley was found and awoken years in the future to learn that the discovery site of the lifeform, planet LV-426, had since been colonized. Joining a military expedition to the planet, Ripley knew that even a single xenomorph would pose a danger to the entire colony, and if any escaped the planet, they could threaten the galaxy.