Avatar Kuruk
Avatar Kyoshi
Avatar Roku
Avatar Aang

In the Avatar the Last Airbender/ Legend of Korra universe, there is one very powerful being dubbed the avatar. The shows mentioned center around the protagonist avatars Aang and Korra respectively. This person has the power to wield the four elements; water, earth, fire, and air. It is revealed that the avatar is bonded with a spirit of good. This spirit is passed on through a cycle of reincarnation which will pass through each of the elements. In this universe, the people live within nations designated by what they bend or what their family bends. For the most part, the element one bends is genetically acquired. A bender will only have access to one element; this is what makes the avatar special. There are also non-benders, akin to human beings in our universe. There are also supernatural animals(dragons) along with common animals which are amalgams of animals from our universe(turtle duck).