Jennifer Hale. Actress: Mass Effect 3. Jennifer Hale is a Canadian-American voice actress and singer who voiced Commander Shepard from Mass Effect, Samus Aran from Metroid Prime, Killer Frost from Injustice: Gods Among Us, Gladys from The Grim Adventures of Billy & Mandy, Trinity from The Matrix: Path of Neo, Princess Morbucks, Sedusa and Ms. Keane from The Powerpuff Girls, Flora from Tak and the Power of Juju, Cinderella from...