So she generates forcefields but her name's "rocket"?
And couldn't they have done a better job of introducing her? It seems like she just pops up and everyone acts lke she's been there all along. She's friggin' Larry from Pinky and the Brain.
Her name is Raquel. Icon agreed to take her on as his sidekick on the condition that she would wear this inertia absorbing belt, based on technology from his spaceship. It made her almost entirely immune to harm by wrapping her in a force field that absorbed kinetic energy. It also allowed her to build up and release the energy absorbed by the belt. By releasing this energy she could produce punches with superhuman force, energy blasts, and approximate flight.
Hence the nickname "Rocket."