Gun
Foxy carries a small pistol which she uses to kill her foes with in the film. It is a symbol that the power to take life and death does not have to be large and intimidating but comes in small packages as well.
Seduction
Foxy tells the dope dealer to turn off the lights so they can sleep together, but she actually does so to kill him. This is a symbol of how she uses her seduction in order to take out the enemy.
Burn It Down
Foxy burns down the dope house at the end of the film by setting it ablaze after dousing one of the men in gasoline. The burning home is a symbol that she's done what she's come to do—burn down the source of her pain.
Modeling Agency
The dope dealers run a modeling agency in the city. It is a symbol of how they manipulate women by playing on their dreams of fame and turn them into prostitutes in order to make money off of them.
Link
Link cowers in the corner of his apartment after Foxy breaks down the door and shoots at him. His physical posture in the room is a symbol of his true nature—he is a coward, a rat in the corner.