Who is the girl with pain in naruto?

Fugai, who appears in Naruto the Movie 2: Legend of the Stone of Gelel, wears an outfit that appears purple and when she transforms into her werewolf-like form she gains sharp teeth and white hair. Though, you might also be thinking about Suigetsu instead. Suigetsu is a member of Sasuke's Hebi/Taka team, has white hair, and a purple outfit, but he's a boy.