Guest Stars Matthew Yang King voices Appa Ruy Iskandar as Lieutenant Jee Lim Kay Siu as Gyatso Casey Camp-Horinek as Gran Gran Yvonne Chapman as Kyoshi Hiro Kanagawa as Fire Lord Sozin David Sakurai as Earthbender Clyde Kusatsu as Kaja Co Starring Derek Lowe as War Minister Simon Leung as Tashi Jeff Yung as Monk Tsutop Leo Chiang as Monk Thet Silver Kim as Pasang Sam Bob as Old Villager Garland Chang as Captain Alex Law as Merchant Linda Minard as Sister Lio Dorian Giordano as Aydo Summer Testawich as Girl Jayden Zhang as Myat Haô Ting as Fire Nation Guard Oliver Tru Sison as Water Tribe Boy