Willow Tweed is a simple old lady who lived alone until she found Tod upon Big Mama's plan to get her outside. She adopts the orphaned Fox and takes care of him as her own. After they experience a lot of trouble with Amos Slade, she realized she cannot keep Tod forever, and that he also must be wild.

She wants him to be safe from Amos Slade and his dogs, so she sets him free in a game preserve, a place free of hunting, however this still does not stop Amos Slade from entering in.

All is well at the end, though, and she seems to be getting along fine despite having been alone again. The movie's end predicts that she won't be as lonely spending some time with Amos Slade while his foot heals.