Screwball wears a white jumpsuit with a white biker helmet, both of with are adorned with fuchsia stripes and her logo, and opaque golden sunglasses. According to J. Jonah Jameson, she has purple hair.

Screwball is heavily narcissistic and aloof. She has no remorse or care for the fact that her actions endanger
lives in New York City, and shows delight in her fans as they wreak havoc.

This shows both callousness on her part, and also cowardice, as she does not act herself.