Suki was the leader of one of the Kyoshi Warrior bands of the Earth Kingdom's Kyoshi Island. Having begun her training when she was only eight years old, she was well-respected by her fellow warriors for her leadership and combat skills. When Team Avatar arrived on Kyoshi Island, Suki and a few other Kyoshi Warriors captured them, thinking they were Fire Nation spies, but released them and befriended them after realizing Aang was the Avatar. Inspired by the outsiders for helping save their village from Prince Zuko, she and the other Kyoshi Warriors left the island to help the Earth Kingdom fight against the Fire Nation. During their journey, she protected the Avatar's lost sky bison, Appa, from falling into the enemy's hands, but she and the other Kyoshi Warriors were defeated by Princess Azula, Mai, and Ty Lee.

Imprisoned in the Fire Nation, Suki was placed within the Boiling Rock, where she hatched a plan to build a sense of community among the prisoners before being betrayed by her ally, Biyu. It was only by good fortune that Sokka and Zuko infiltrated the facility looking for Sokka's captured father, Hakoda, instead finding her. Freed from captivity, Suki later helped Aang and friends defeat the Fire Nation and eventually reunited with her fellow Kyoshi Warriors. Following the end of the Hundred Year War, she continued to lead the Kyoshi Warriors as bodyguards for Fire Lord Zuko, assisting in defeating the New Ozai Society. She later rejoined the rest of Team Avatar to put down the bender supremacist insurrection in Cranefish Town.