Erin Grey Van Oosbree (born August 24, 1973), credited as Grey DeLisle (/dəˈlaɪl/) and Grey Griffin, is an American voice actress and singer-songwriter. She has done voice acting for numerous animated films, television shows, and video games. Her voice roles include Vicky from The Fairly OddParents, Samantha "Sam" Manson from Danny Phantom, Mandy from The Grim Adventures of Billy & Mandy, Frankie Foster, Duchess, and Goo from Foster's Home for Imaginary Friends, Yumi Yoshimura from Hi Hi Puffy AmiYumi, Azula from Avatar: The Last Airbender, Kimiko Tohomiko from Xiaolin Showdown, and Lola, Lana, and Lily Loud from The Loud House. She has been the voice of Daphne Blake in the Scooby-Doo cartoons and direct-to-videos since 2001. In video games, she voices Amanda Valenciano Libre from Metal Gear Solid: Peace Walker.