Sokka grew up in his village as an aspiring warrior-in-training of the Southern Water Tribe. Forced to mature quickly when his mother Kya was killed in a Fire Nation raid, he cultivated his warrior skills with a militant zeal, while his sister Katara did chores dan practiced waterbending.[6] When Sokka was thirteen, his father dan the other village men left to fight alongside the Earth Kingdom in the war against the Fire Nation, leaving him dan his sister to look after their tribe with their grandmother, Gran Gran.[7] As the oldest male left in the South Pole, Sokka came to assume a semi-leadership role by the time he was sixteen, fiercely protecting the village from any possible outside threats while trying to train children to be a new generation of defenders.

While on a spearfishing expedition, Katara dan Sokka discovered Aang in suspended animation dalam bongkah ais. Setelah Katara membebaskannya, Sokka initially believed that the Airbender might be a Fire Navy spy, dan he eventually grew xenophobic enough sehingga membuang Aang dari kampung. Setelah menyedari bahawa Aang adalah sang Avatar, destined to master all four elements dan bring peace to the world, Sokka relented, realizing that they had a common enemy in the Fire Nation. He then set off with Katara dan Aang on their journey to find a waterbending instructor at the North Pole, determined to hone his warrior skills by way of fighting Firebenders along the way. Fire Nation general Zhao killed Tui (the moon spirit) causing the moon to turn red dan then vanish as during a lunar eclipse, thus preventing the waterbenders from using waterbending. Princess Yue (one of Sokka's love interests, the other being Kyoshi warrior Suki) then becomes the new moon by giving her life energy to the moon spirit, thereby restoring the moon in the sky dan the abilities of the waterbenders.[3]

Dalam episod "Sokka's Master," Sokka expresses self-doubt dan worry that he is not contributing as much to the group as his bender companions are. Dengan inspirasi friends' encouragement, he seeks out a master from whom he could learn the art of the sword. Rather than fighting with brute force dan flawless technique, Sokka's creativity dan heterodox approach to things are the cornerstones of his technique, dan his master notes that in time Sokka will be a superior swordsman. As he departs, his master gives him a game piece that was previously established as a sign of connection to the secret society known as the Order of the White Lotus.

In the two-hour series finale, Sokka dan Katara meet with Katara's Waterbending master, Pakku, who has now married their grandmother. In the battle against Ozai, Sokka, his girlfriend Suki, dan Toph hijack a Fire Nation airship dan use it to destroy others of its kind while Aang duels with the Phoenix King (Firelord Ozai). Sokka dan Toph are separated from Suki dan attack another airship, but Sokka breaks his leg dan strains his arm grabbing hold of Toph, who was falling off the ship. In a compromised position, the pair are attacked by two soldiers, whom Sokka defeats at the cost of his sword dan boomerang. As he dan Toph are on the edge of the crashing ship, Suki arrives with another airship dan saves the two. With the battle over, the trio reunite with Aang dan the vanquished Phoenix King. At Zuko's coronation, Suki is reunited with her fellow Kyoshi Warriors, Sokka dan Katara are reunited with their father, with the rest of the group reunited with their friends. In the end, Sokka dilihat dalam kedai teh Iroh di Ba Sing Se dimana semua orang mengejek gambar pasukan yang telah dicatnya, dimana beliau mengubah beberapa perincian fakta untuk menjadikan babak itu lebih senang "diingati".