Also known as Swannysue, Swanfeather is a dumb blonde Mary-Sue who is obsessed with Birchfall and Pirates of the Caribbean, and out to kill Elizabeth Swann and Leafpool.

She is a white she-cat with black front paws and black ear tips with green eyes. It is confirmed she will be Purdy's second-in-command when he becomes Supreme Overlord in the epilogue of The Last Hope.