Phoebe Halliwell is an alternate universe version of her heroic counterpart from the main Charmed Universe.
She is a witch who is a part of the Evil Charmed Ones. She was presumably the daughter of this world's Victor Bennett and an evil witch, Patricia Halliwell. She's the half sister of Paige and the sister of Piper and Prue Halliwell. She seems to love to wear brass knuckles made by Tiffany. Much like Paige, she fought her heroic counterpart from the Main Charmed Universe to a draw. Also she assisted the good counterparts to save her nephew, Wyatt from the rogue darklighter Gideon.