Rule one: this is not a TLOK rp. Its just like the avatar world, but like with airbenders, so you can be them.

Rule two: no being ATLA characters. You can mention them, but no being or being related to them

Rule three: here is a list of the bending types you can be:

Fire (combustion lightning heat energy (like those healer ladies that saved korra, not like crazy energy blasts or anything))

Earth (metal sand mud, all those)

Water (blood ice mist spiritwater plant)

Air (cloud sound flying)

Nonbending.

No having the bending of a different element if you have one already