Amon.

About Amon

Amon, born as Noatak, is a fictional character in Nickelodeon's animated television series The Legend of Korra, and is part of the Avatar: The Last Airbender world. Amon first appeared in the series' premiere, Welcome to Republic City, and is the main antagonist of the first season. The character was created by Michael Dante DiMartino and Bryan Konietzko, with collaboration from Joaquim Dos Santos, and is voiced by Steven Blum.