This pokemon papercraft is the Hilda. It is created by MountainOfCookies. Hilda is the female protagonist in Pokémon Black and White. She's the counterpart to Hilbert. She is often referred to as White while Hilbert is often referred to as Black.
She has brown hair and blue eyes and is tall. Her top hair is covered by her hat that is why it is unknown what her hairstyle is. In the Pokémon Adventures Manga, her counterpart there, named White, was shown her hair once, though it didn't have much difference even if her hat was worn.
If you choose your gender as female in Pokémon Black and White, you will get her as the player character. If you choose the male player, you can meet Hilda at the Battle Subway as a partner.