How Grey Delisle Became The Most Underrated Voice Actor Ever Comment “grey” and we will send your our full convo with @greydelisle out now. This is one of the most fun, heartfelt, and unexpectedly deep interviews I’ve ever done. She’s the voice behind Azula (Avatar: The Last Airbender), Daphne Blake (Scooby-Doo), Vicky (The Fairly OddParents), Mandy (The Grim Adventures of Billy & Mandy), Sam Manson (Danny Phantom), Frankie Foster (Foster’s Home for Imaginary Friends), Catwoman (Batman: Arkham C