Siblings Katara and Sokka wake young Aang from a long hibernation and learn he's an Avatar, whose air-bending powers can defeat the evil Fire Nation. When a boy found frozen in a block of ice is thawed, the world learns he's the Avatar they've been waiting for, and his destiny takes a dizzying turn Number Of Seasons: 3. Katara (卡塔拉, Kǎ Tǎlā) is a fictional character in Nickelodeon's animated television series Avatar: The Last Airbender and The Legend of Korra. The character, created by Michael Dante DiMartino and Bryan Konietzko, is voiced by Mae Whitman in the original series and Eva Marie Saint in the sequel xtrmtracker.com appearance: "The Boy in the Iceberg". (Aang x OC) Siblings: Sokka Katara Kalena (oldest to youngest) "Water. Earth. Fire. Air. My grandmother used to tell me stories about the old days, a time of peace when the Avatar kept the balance between the Water Tribes, Earth Kingdom, Fire Nation, and Air .