Hazel is a yellow squirrel, with a white face and belly. She always carries a walnut with her.
Hazel gives the following puzzles in Professor Layton and the Azran Legacy:
"A squirrel from the woods near Kodh, Hazel cuts an adorable figure when springing from tree to tree looking for walnuts. Tragically, many of Hazel's avian friends find it hard to locate their homes as a result of the magnetic field in the area."