Vasquez is a private in the Colonial Marines in the movie Aliens.
Attitude
Appearance
In her physical appearance, there is little difference between Vasquez and the appearances of the other marines. In many ways, she is one of the guys except that she has a two-piece outfit while in cold sleep instead of the shorts that the other males wear.
Abilities
Relationships
The relationship Vasquez has with the rest of the marines is a close, friendly relationship. It shows in the ribbing between her and Hudson, the playful pull-ups contest after cold sleep, and even her final line before her death by grenade.
Vasquez: You always were an asshole, Gorman!
Sexuality
Since this is an action move, there is very little time to develop Vasquez as a character beyond shooting and killing. In plot, there is only one spoken reference to her gender:
Hudson: Hey Vasquez, have you ever been mistaken for a man?
Vasquez: No. Have you?
None of the other male marines make any comment on gender, either theirs or other marines.