Witch (left 4 dead)

 The Witch  is a member of the Infected and the only one to display an initially passive response to presence of Survivors. The Witch is highly sensitive to light and the close presence of uninfected humans. Shining a flashlight on a Witch or approaching too closely will "startle" her and trigger an attack. Hitting her with a bullet has the same result. She is totally unresponsive to Infected and the passage of nearby bullets.

When alert to the presence of an uninfected human or flashlight, she will look in the human's direction and make a low warning growl: this signals an incipient attack. If the human backs off, switches the light off or moves quickly out of her presence, she will fairly soon settle back into a passive state. But if the threat persists, she will launch an attack directed at the human who "startled" her at great speed, singling out the person who provoked the attack. She is able to incapacitate her victim instantly whereupon she frenziedly slashes that person with her clawed hands, only stopping if either she or the victim die.

If an attack is successful and she is still alive, she will run off sobbing out of sight. She will display the same behavior if her attack is frustrated (e.g. the victim is able to outrun her), again she will give up and run away.

Killing a Witch is not always required, since you often sneak around her or wait until she wanders away from their intended path. However if she is immobile because it is dark and it is not possible to go around her, the only option is to work out a plan to kill her.

A Witch's physique is that of a extremely thin young woman with pale skin, shoulder-length platinum-blonde hair, sunken red eyes, and a bloody mouth full of sharp teeth. She is only clad in the remains of a tattered white tank top and a pair of white panties, and like most Special Infected she does not wear any shoes. Her most distinctive features are the twelve-inch-long, bloodstained claws her fingers have grown into. Her knees and feet are stained with dirt and blood.

The Witch has been heavily mutated by a strain of The Infection, in terms of physical strength rather than appearance. Though resembling a typical female Infected, she has sharpened elongated fingers that are similar to the condition of arachnodactyly (which often accompanies Marfan syndrome). Her choice of attire when compared to other Infected could indicate a raised body temperature such as a fever, which could also explain the sluggishness, constant signs of distress, irritability, and sensitivity to light and sound. However, the Witch may have attempted to remove her clothing herself as it appears as if she cut the clothing up herself.

Despite her petite figure, the Witch has incredible strength and stamina, enabling her to incapacitate or instantly kill Survivors in one hit, depending on the difficulty level. She is known to cry when not aware of the Survivors, although the reasoning behind it is unknown. It's likely she is incredibly depressed - a symptom that could accompany her loss of sanity or the virus has not taken full control and she knows she is a monster and she is depressed due to this fact and when a survivor is to close or turns a flashlight on etc. the virus starts to take over or it could be an evolutionary advantage, meant to lure unsuspecting Survivors to her Oddly, she glows red in dark areas, possibly due to her glowing eyes. It is also unknown whether or not the Witch is extremely thin because of the Infection (weight loss due to starvation) or if this was her body shape before the infection took place.

