She is one of Babs Bunny's two best friends and the crush of Plucky Duck, but she only occasionally pairs with him, such as going to a dance. She doesn't, however, happen to have a crush on him because he hardly ever shows kindness to others. In some episodes who wanted to beat Plucky up for being love interest. Her name is based off Shirley MacLaine. Shirley is a very pretty white loon with shoulder-length blonde hair with a pink bow and a long-sleeved sweater. Gail Matthius did her voice with a valley girl accent.
Shirley is a young clairvoyant loon with extraordinary psychic powers. Her intelligence is somewhat obscured by a thick Valley girl accent and obsession with superficial New Age paraphernalia.
Many characters regard Shirley as a flake, but she takes their skepticism philosophically; "I know I'm at one with the spiritual plane. Besides, in your next lives, you're all coming back as avocados, so there." Always in a state of calm cosmic oneness, Shirley is the spaciest toon in Acme Acres.
Despite this trait, however, Shirley shows that she can be very kind and helpful towards her friends. She aids her friends on several occasions, such as reminding Plucky of his crude behavior.
Shirley is adept at mind-reading, channeling, and projecting her aura (a glowing likeness of herself with a mind of its own). She can levitate herself during meditation, commune with her aura (which is sometimes a separate entity from her), and fire force-blasts from her hands when agitated. In the Love Disconnection episode segment, The Amazing Three, where Babs Bunny, Fifi La Fume, and Shirley attend a prom at Perfecto Prep (a rival university), red punch gets spilled on Shirley, and she begins a rampage very similar to that of Carrie (although much more G-rated), from the Stephen King novel of the same name.