Maiden Werewolf

The Maiden Werewolf is an OC that appears in the series. Through unknown means, she became a werewolf that later ends up attacking King's Landing upon transforming, mauling and killing close to 500 people before being slain by Eddard Stark, who slices the brutish monster in half with his greatsword Ice, making the werewolf revert to its human form, which is that of an attractive young woman, horrifying the Warden of the North.

The Maiden Werewolf's human form is played by Merritt Patterson.

History
The Maiden Werewolf makes her first appearance working at an inn, receiving sexual comments from a man who forces himself on her outside. Unbeknownst to the man, it's a full moon that night. As he kisses her, she bites his lip, drawing blood as a result of her fangs sprouting out. Horrified, the man runs away, loudly apologizing to the girl, though she fully transforms and mauls her would-be rapist, clawing and biting his chest and face before tearing into his chest cavity and ripping his heart out, finally killing him as she feeds off of his body.

Powers

 * Super Strength: Due to her status as a werewolf, she has heightened strength. Upon transforming, the Maiden Werewolf develops amazing strength, capable of easily tearing men apart with her sharp claws, decapitating horses, and smashing through wooden doors and walls like they were nothing. However, she is significantly weaker than Alec Targaryen, who could easily kill her if the two ever got into a fight.
 * Super Speed: The Maiden Werewolf can run faster than any man or animal in either her human or werewolf form.
 * Regenerative Healing: The Maiden Werewolf can heal from various injuries that would kill an average human, including stab wounds, being shot with an arrow, and even falling from great heights. Unfortunately, her healing is vastly weaker than Alec's.

Weaknesses

 * Full Moon: A major downside for the Maiden Werewolf is that she can only transform at night during a full moon. Any other time, she can only enhance her physical abilities for a short period of time.