Hazel is a timid, soft-spoken red squirrel that lives "across the pond". When nervous, she tries to hide herself behind her long, poofy tail. It's assumed that Chessie and Hazel are cousins, but the exact lineage is unclear.
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.