This features a list of significant characters from the animated television programs Avatar: The Last Airbender and The Legend of Korra created by . Avatar The Last Airbender: The Complete Series Blu-ray offers decent video and solid audio in this excellent Blu-ray release After a lapse of years, the Avatar-spiritual master of the elements-has returned. And just in the nick of time. The Four Nations (Water, Earth, Fire, and Air) have become Author: Martin Liebman. Later other elements are added. Fire itself comes to be seen as emanating from air (vâyu,), which is later seen to emanate from "aether" (âkâsha,, or kha,).These are similar enough to the Greek elements, and their introduction occurs late enough, that Greek influence cannot be discounted.