Kuruk

Kuruk was the Water Tribe Avatar immediately succeeding Avatar Yangchen and preceding Avatar Kyoshi. Native to the Northern Water Tribe, he was a powerful and gifted bender who dreamed of changing the mortal world for the better by uniting the people and acting upon the foundations laid by Yangchen. His hopes were dashed, however, after a brutal confrontation with a dark spirit resulted in a deep spiritual corruption that began to fester within him. This clash was only the first of its kind, as an increasing number of dark spirits began to cross into the mortal realm to wreak destruction. To prevent others from being affected with the same sickness that tormented him, Kuruk opted to repeatedly face the wrathful beings on his own. Only his spiritual mentor, Nyahitha, knew about the sacrifices and loneliness he endured.