I come to give this a try. So many awesome concepts. Here's my take. She is Vi Mystica, the Goddess of Kinetic Energy. The way she gathers energy is to gain speed. The faster she is, the more kinetic energy she gains. The kinetic energy will produce a pure blue energy that will emit from a backpack device. The pure energy will form into fins and tail that will not only provide more trust but also become the way she attacks.
At first, she starts with running, then using her wheels she is able to move even faster. When she is at an optimum speed, the Kinetic Energy is able to propel her to fly making her look like an enormous hammerhead swimming through the sky.
She is able to direct the Kinetic Energy to the front of the head and project a huge energy horn that is able to penetrate any defenses with pure force.
Here's a sketch. Comments and critiques are most welcome