Piper is the heroine of the 2011 action fantasy, Drive Angry. She was played by Amber Heard.
A waitress, who joins John Milton in his quest to kill Jonah King, the big bad and cult leader, and finds out her husband is cheating on her and gets into it with him and Milton helps her. They continue on their journey to King and fight him and his followers in a hotel, a church, roads, and then an abandoned prison. She admits to Milton that the reason why she wants to go with him in his mission to destroy King and save his granddaughter is to prove her worth in combat. When King kidnaps her, he orginally plans to convert her to his devil worshiping faith but then discovers she's too stubborn to be taught and then plans to destroy her but fails.
She gets kidnapped by The Accountant, demon and major character, and says that King can really bring Hell to Earth if Milton's daughter is sacrificed. Then The Accountant releases both Milton and then Piper and all 3 of them kill King and his followers one by one, stop King's plan, and save Milton's daughter. Before Milton and The Accountant return back to Hell, Milton says farewell to her and she promises to care for and protect his granddaughter and leaves with Webster, Milton's friend and hero.