Brett, S.E.
S.E. Brett was the engineer's mate aboard the Nostromo. Brett usually hung out with Parker, and was a very quiet man, and the most overheard statement coming from was, "Right," usually in response to whatever Parker said (although he would also use it as a response to anyone else aboard the ship, likely as a force of habit). When an alien chestburster exploded from Second Officer Kane's chest, Brett went with Parker and Lt. Ellen Ripley to hunt it down using a motion detector.
Instead, the motion detector found Jones the cat. As Jones was the beloved pet of all the Nostromo's crew, Brett went off to retrieve the cat, but instead ran into the fully grown Xenomorph while looking for Jones in the ship's hold. He was then killed by it when it thrust its deadly inner jaw right through his forehead.