- Ash (Featured in Alien; android science officer on board the Nostromo, Ash malfunctions, attacks his fellow crew members, and is ultimately dismantled)
- Bishop (Featured in Aliens; an android on expedition to LV-426)
- Hicks (Featured in Aliens; a corporal in the marines)
- Hudson (Featured in Aliens; a private in the marines)
- Jonesy (Featured in Alien and Aliens; orange-and-white tabby cat who escapes with Ripley from the Nostromo)
- Newt (Featured in Aliens; a little girl who seems to be the only survivor of a colony on LV-426)
- Ripley (Featured in Alien and Aliens; survivor of the Nostromo‘s alien infestation and rescuer of Newt)
These dog and cat names are derived from characters featured in the movie Alien (1979) and its sequel Aliens (1986). Warning: Plot spoilers are revealed below.