Cosplayer is Jillian Ann.
Catwoman (Selina Kyle) is a fictional character appearing in American comic books published by DC Comics, commonly in association with the superhero Batman. The character was created by Bob Kane and Bill Finger, and made her debut in Batman #1 (Spring 1940), in which she is known as "the Cat". Catwoman has traditionally been portrayed as a supervillain and adversary of Batman, but since the 1990s, she has been featured in an eponymous series that cast her as an antiheroine rather than a traditional villain. Catwoman is known for having a complex love-hate relationship with Batman and has been Batman's most enduring love interest. (Wikipedia)