This one here is Black Hanekawa from the anime series Bakemonogatari^^ She's the possesed form of Tsubasa Hanekawa when the Sawarineko spirit takes control of her body, changing her appearance with some cat ears and white hair, and also her personality as well with something more playful and shameless but also more violent and brutal xDDDD I'm not a big fan of Tsubasa myself but her "alternate form" is by far my favourite of the series and it's easy to explain why: Cat-girl + White-hair? Nothing else matters to me xDDDDDDD
Hope you like it!!
Black Hanekawa©Nisio Isin