Yangchen was the Air Nomad Avatar succeeding Avatar Szeto and preceding Avatar Kuruk. She grew up in a rather isolationist time for the four nations in the aftermath of the Platinum Affair. After mastering all the elements in her youth. Following her confrontation with General Old Iron in Tienhaishi, Yangchen resolved to adapt to the complex political strategy of the four nations, using manipulation, espionage, and deceit to her advantage in an era where loyalty was bought rather than earned.