P.J. Byrne
voices Bolin
David Faustino
voices Mako
J.K. Simmons
voices Tenzin
Seychelle Gabriel
voices Asami Sato
Kiernan Shipka
voices Jinora
Richard Riehle
voices Bumi
James Remar
voices Tonraq
Adrian LaTourelle
voices Unalaq
Dee Bradley Baker
voices Naga