Champion swimmer, with the power to deliver electric shocks, and to shoot netting from her hands.

On an extreme swim near Midway Atoll, intended to raise awareness of ocean garbage, Polly Mercer becomes trapped in a mass of old balloons and netting that had collected near a secret U.S. Navy site testing the Vortex Formula. Her body melds with the mylar and other plastics, transforming her into Polymera.