Grey DeLisle, often credited as Grey Griffin, is an American voice actress, singer, and comedian who voices Shrinking Rae, Monster Girl, Olga, Betsy Wilkins, Thula, and various others in Invincible.
Her roles include Vicky from The Fairly OddParents, Daphne Blake from Scooby-Doo, 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, Ingrid Giraffe, Nurse Gazelle and Lupe Toucan from My Gym Partner's a Monkey, Riley Daring from The Replacements, Frida Suarez from El Tigre: The Adventures of Manny Rivera, Azula from Avatar: The Last Airbender, Darlene Spritzer from Lobo, Lady Delilah Briarwood from The Legend of Vox Machina, among many others.