Ash

From AvP Online Encyclopedia

Science officer on board the Nostromo who was later revealed to be an android, model Hyperdyne systems 120-A/2. Placed on the vessel by the Weyland Yutani corporation at Thedus he followed Special Order 937, so his first priority was to protect the alien, even if it meant the deaths of the rest of the crew. When he tried to kill Ripley, preventing her from finding out the truth, Parker and Lambert disabled him with Brett’s cattle prod. Later questioning revealed the truth, about how the company had known what would happen all along. An ambiguous, very private character, Ash never quite seemed to fit in with the rest of the crew. It was only Ripley that didn’t trust him the whole time, after he disobeyed her order to let Kane back on board. She hoped that he knew how to kill the alien. He claimed he didn’t, so Parker incinerated him.