Guest Stars Dee Bradley Baker voices additional voices Jennie Kwan voices Suki Mark Hamill voices Fire Lord Ozai James Garrett voices Avatar Roku Victor Brandt voices Master Pakku André Sogliuzzo voices King Bumi Jennifer Hale voices June Jennifer Hale voices Avatar Kyoshi Robert Patrick voices Piandao Keone Young voices Jeong Jeong Kevin Michael Richardson voices Lion Turtle Tress MacNeille voices Yangchen Jim Meskimen voices Kuruk