Elizabeth is a mouse living in the walls of Dook's home. She doesn't socialize much with the animals on either side of The Window, and when she does, she can be very distant and soft-spoken...until she starts to sing. After hearing Dook's untrained voice, she decided to give him singing lessons so he wouldn't embarrass himself around her again.
Raoul is a wolf that has known Chessie since she was a kit. He's pretty patient with Chessie's antics, though that may come from being a little older than her.