Polyfour.

You are a new student Polyfour, not your real name of course but it's the superhero name you chose as you are a bilateral amputee who uses your power of plastic manipulation to make your own incredible prosthetics. Be creative how you use your power, for example you coild make your hands become a sword and shield, you could help the environment with your ability to recycle plastics, you could disable wiring etc etc.