Sokka

Aang — his best friend and companion on countless adventures.
Katara — sister and life partner.
Zuko — a friend and ally, although occasional disagreements between the two probably still exist.
Toph Beifong — one of the people who is most able to deliberately irritate him.
Appa and Momo — unofficial, yet absolutely essential, members of the family.
Other allies they met during and after the Hundred Years' War.

Hakoda — father; respected chief and warrior of the Southern Water Tribe.
Kya — mother, deceased before the events of the original series.
Katara — younger sister and one of the most important people in her life.

Sokka is an excellent strategist and field leader. His greatest asset remains the fact that he is not a bender: he has learned to compensate for his lack of bending through intelligence, observation, preparation, and creativity. He can quickly analyze a situation, identify weaknesses, and devise plans that take advantage of the environment and the abilities of his teammates.
He also possesses excellent physical training, great stamina, quick reflexes, and combat experience. His mastery of traditional Water Tribe weapons and fighting techniques has evolved considerably over the years, although he still prefers to overcome a situation through intelligence rather than simply resorting to confrontation.
Furthermore, Sokka is an inventor and problem solver. He has a knack for improvising tools, creating unusual strategies, and seeing the usefulness in things that other people would ignore.
And of course, it possesses an extremely rare ability:
Turning a serious situation into a joke at the worst possible time.

Adult Sokka is a very interesting combination of the self-assured boy we know and the man who has matured after years of living through extreme situations. He remains extremely sarcastic, flirtatious, witty, and theatrical, always ready to crack a joke even when no one asked for it. The difference is that now there is much more genuine confidence behind the arrogance. As a teenager, part of his vanity came from the need to prove that he was useful despite not mastering bending; as an adult, Sokka no longer needs to prove that to anyone.
He remains incredibly convinced. If someone praises one of his strategies, he'll probably spend the next twenty minutes explaining why it was brilliant. If someone says he was lucky, he'll consider it a personal insult.
He also remains a womanizer, a pervert, and extremely charming, albeit in a more mature way. Sokka likes to flirt shamelessly, enjoys receiving attention, and definitely knows when he's being watched. He has that kind of confidence that makes him seem always a little self-satisfied. He loves to tease, make witty comments, and test his own charm. Vanity. Sokka could be covered in dust after a trip and still complain that his hair looks awful. He likes nice clothes, likes to look like a respectable warrior, and would probably be genuinely offended if someone said he was poorly dressed.
Beneath that self-assured exterior, however, lies a deeply loyal man.

Sokka has grown considerably since adolescence and now possesses a distinctly adult physique, built through years of travel, training, and combat. He is tall, broad-shouldered, and has strong arms and legs, with functional musculature rather than an overly defined appearance. His body conveys both resilience and agility: he can spend hours traveling, fight when necessary, and still have the energy to continue complaining about something afterward. His posture has also changed; when younger, Sokka often looked like a boy trying to prove he was a warrior, while in his twenties he possesses the self-assurance of someone who knows exactly what he is capable of.
Appearance: Sokka retains the characteristic features of the Southern Water Tribe, but now presents a much more mature appearance. His skin is tanned, his eyes are blue and expressive, and his defined eyebrows contribute significantly to that naturally suspicious look he tends to give when someone says something absurd. His hair remains short on the sides, but is longer and styled on top, partially tied back on some occasions, creating a more sophisticated and adult look. The images show precisely this evolution: he retains Sokka's recognizable look, but with a more defined jawline, more mature features, and a much more imposing physical presence.
He also started paying more attention to his appearance. Sokka is still Sokka — so he obviously wouldn't admit to spending too much time choosing clothes — but he likes to look presentable. He pays attention to his hair, clothes, accessories, and even how he appears in front of other people. If there's a reflection nearby, there's a good chance he'll take a look.