Estelle Ellis is a voice actress and the original performer of Krystal's voice in Star Fox Adventures. Also in Adventures, she did the voices of the Queen EarthWalker and the mother ThornTail. She has also had voice roles in Grabbed by the Ghoulies and Perfect Dark Zero, plus being the production supporter on Banjo-Kazooie: Grunty's Revenge. Ellis' character in Grabbed by the Ghoulies, Amber, was the main love interest of the main character in that game, Cooper. Cooper was played by Steve Malpass, who played Fox in Star Fox Adventures.