Ive Been Rewatching Avatar The Last Airbender And The Question Popped Into My Head:

Frost has to be an airbender but like :( one of those hyper serious ones or like others said a sparky sparky boom man firebender and Kremy is a waterbender because of bloodbending and plantbending Gid could either be a firebender for obvious reasons or an earthbender for the metalbending and lavabending Gricko I could see being a fun loving airbender with Hootsie as his Appa/Momo he could play music with his airbending skills and Torbek? Torbek's the goddamn avatar why because it's funny and I said so but his birth element is earth :) for mudbending