Introverted Intuition (Ni): Ripley has good instincts, and is forever thinking about the consequences of actions; she advises against opening the door and letting a contaminated man inside the ship. She comes up with effective strategies and plans to eliminate the threat, track down the alien, and protect the others. She is driven, focused, able to grasp difficult concepts with ease, and can narrow down the possibilities into a concise point of action.
Extroverted Thinking (Te): She isn’t afraid to reprimand others for undermining her authority, or to take charge when she needs to. Ripley is comfortable handing out assignments and giving direct orders. She makes firm decisions and refuses to budge on them (others undermine her authority, and receive the brunt of her wrath as a result). Ripley likes to hold to the rules and regulations of their work, she prefers to deal in facts, and can make totally rational decisions without allowing her emotions to get in the way.
Introverted Feeling (Fi): Her emotions rarely turn up, and only surface when asserting that others have wronged her in disobeying regulations. Ripley manages to keep her cool in dangerous situations, but also stands firmly by her chosen course of action. She refuses to budge, negotiate, or compromise.
Extroverted Sensing (Se): Her desire to balance out her theories and forward focus means she utilizes her Se in tying her conclusions to concrete realities; Ripley learns to abandon structure for quick improvisation and immediate action. She is comfortable undertaking physically difficult tasks.