While the fates of many of Avatar: The Last Airbender’s core characters are at least partially revealed in The Legend of Korra, the sequel makes no mention of what happens to Suki after the events of the original show. The leader of the Kyoshi Warriors was a key player in Aang’s journey, especially in the final showdown with Fire Lord Ozai during Sozin’s Comet. Fortunately, the graphic novels give some idea as to what Suki got up to after the end of Avatar: The Last Airbender.
The events of the TV series see Suki leave her lifelong home on Kyoshi Island with the rest of the Kyoshi Warriors and set out in the Earth Kingdom to use their skills to help people. They temporarily serve as security guards for a refugee camp near Ba Sing Se, and later help Appa return to Aang after being stolen. Arrested by the Fire nation at the end of season 2, Suki eventually breaks free from The Boiling Rock and joins team Avatar for the remainder of the story. She even lets Ty Lee join the Kyoshi Warriors, in exchange for a few lessons in chi-blocking.
After Sozin’s Comet, Suki’s worldly travels continue. The graphic novel The Promise tells the story of the Earth Kingdom and Fire Nation fighting over sovereignty of the former Fire Nation Colonies. Zuko initially plans to remove all of his people from the occupied Earth Kingdom land, but the issue becomes more complicated when a group of disgruntled Fire Nation citizens attempts to assassinate him. In response, Suki, Ty lee, and the rest of the Kyoshi Warriors journey to the Fire Nation to serve as Zuko’s personal security detail.
Suki and her fighters remain with Zuko through the events of the fourth graphic novel, Smoke and Shadow, which continues the story of a rebel Fire Nation faction — aided by an escaped Azula — that attempts to overthrow Zuko. Suki fights alongside Zuko through these arcs, and also serves as his confidant as Zuko struggles to rule a divided country.
Later, in the graphic novel Imbalance, Suki has left the Fire Nation to rejoin Sokka and the rest of Team Avatar in the Earth Kingdom. Imbalance tells the story of Cranefish Town – a rapidly-industrializing peninsula village, which later becomes The Legend of Korra’s Republic City. Cranefish Town is threatened by constantly violence, as a group of “bender supremacists” seek to sabotage the advancement of non-benders and perpetuate their status as second-class citizens. To help the town’s non-benders defend themselves, Suki teaches a small security force how to chi-block. At the end of Imbalance, she chooses to remain in Cranefish Town for the time being with the rest of the Kyoshi Warriors, in order to keep training non-benders in the art of chi-blocking for self-defense.
After that, Suki’s canonical whereabouts remain unknown. While she and Sokka are still dating at the end of Imbalance, it’s unclear how long Suki and Sokka's relationship lasts. Some fans have read a few particularly personal moments between Zuko and Suki in the graphic novels – which take place after he and Mai break up – as suggestive that there could be something more than friendship between them. Of course, Suki and Sokka are still together at the time, and such interpretations are purely speculative.
Regardless of what happens through the rest of Suki’s life, her arc in the graphic novels as a globetrotting warrior is a pretty great addition to an already excellent character. At one point in the comics she even reveals the origins of the Kyoshi Warriors – a group of women trained by the Avatar herself to protect themselves from a group of abusive men on their island, who then passed down Kyoshi’s teachings. It’s an interesting addition to the Avatar lore that certainly fits with Suki’s own devotion to justice. For now, fans will have to wait and hope for some more Suki content in the future.