The Spitter is one of the antagonists of L4D franchise. She is a Special Infected, and is named Spitter because of her acid she spits on the survivors. The Spitter is the ugliest of the Infected.
The Smoker is Spitter's love interest. They can go to movie, make things explode and go to anywhere they like.
The Boomer tries to flirt the Spitter but she spits acid on him as he turns into a Bile Bomb.
During her time in a new gym. Spitter spits acid at Francis, burning him.