curse my corrupted mind! this is about avatar!
i thought you were talking about gender bender.
i'd be a wind bender, i guess. if Avatar messes with physics enough (like air gear) i can create both fire, lightning and flesheating bubbles with air. if not, air is still likely a offensive element, and you can't win a fight with defence.
to quiet.storm: use air to blow them up from inside out by overflowing the lungs with air
like a frog with a straw