Avatar: The Last Airbender is a hit action/adventure animated series set in an Asian-inspired world divided into four nations, and the adventure began in the Southern Water Tribe, home of Sokka and Katara, the son and daughter of Chief Hakoda. They were Avatar Aang's first two friends and allies in the new era, and they have distinct and strong personalities to set them apart from Aang and each other.
Sokka, in particular, is known for his somewhat eccentric but brilliant thinking, and his role in Team Avatar is to be the strategist and planner, not the heavy-hitter in combat. It was Sokka who devised the eclipse invasion of the Fire Nation, and he has invented countless weapons and items to help fight back against the Fire Nation and protect Aang. Given his role on the team and in the show, his MBTI personality type makes perfect sense.
Sokka's MBTI Personality Type Is ESTJ-T: The Executive
Sokka is an ESTJ-T, a turbulent variation of the Executive personality type. An Executive is a born leader who can form strong and emotional connections to others, and lead people as a team of trusting and loyal individuals. This personality type is a careful planner, like an Architect, but they have stronger people skills and are more likely to integrate themselves into a team and put the team's needs ahead of their own. Instead of seeing other people as chess pieces, they will see others as heartfelt comrades, and that can make them even more charismatic. Executives may not be the ultimate social butterflies, but they do understand other people and know how to put them to work constructively.
Sokka's MBTI personality code stands for Extraverted, Observant, Thinking, Judging and Turbulent. While he's not a party animal like the cheery Ty Lee, he can still make friends and even attract romantic partners. Executives are also known for being fond of rules, traditions and precedent, being creative but also somewhat inflexible at the same time. They can creatively combine existing rules to form new outcomes, and make the most of the rulebook while still respecting tradition. Executives like Sokka also encourage other people to be their best and work hard in a team or organization to bring about the best results; and lead the members to victory.
Sokka as an Executive in Avatar: The Last Airbender
At times, Sokka seemed like an introverted person, such as when he clashed with Aang in the earliest episodes for disrupting his tribe's routines or when he rejected the Kyoshi warrior culture. Deep down, though, Sokka proves to be a true extravert who gladly welcomes new friends into his life. He's not as extraverted as Katara or Aang, but he is always willing to team up with anyone who thinks like him. Ultimately, he warmly accepted Aang, Zuko, Toph and Suki the Kyoshi warrior as friends and allies, and trusted them completely. It didn't take him long to open his heart to any of these people, such as when he confessed to Toph his turbulent feelings about his mother's death and his ongoing grief. Later, Sokka and Zuko shared their woes about their dating history during their trip to the Boiling Rock prison. Sokka empathized with Zuko completely, and vice versa, leading to the iconic line said by Zuko: "That's rough, buddy."
Sokka has his extraverted side, but, most of all, his ESTJ-T personality shines when it's time for a mission or a battle. Sokka identifies himself primarily as a leader and strategist, and this is his single biggest asset as a member of Aang's team. Ever since his boyhood, he has viewed himself as a protective big brother, not just to Katara, but to the entire Southern Water Tribe. He wouldn't rest until everyone in his community looked up to him as a trusted leader and friend. He even trained a handful of young boys to defend the tribe, and Sokka grew frustrated when the kids decided to play instead of listen to him.
During the story of Avatar, Sokka worked hard to set goals for the team and devise plans of attack to fulfill that goal, and he had little patience for detours. To him, efficiency is key. He didn't appreciate the easygoing nature of characters like Chong and his band of flower-loving nomads, when they met en route to Omashu. In Book Three: Fire, Sokka worked harder than ever to map out and follow a tight schedule to keep the gang moving. He also volunteered to explain the invasion plan to the assembled troops. He botched this first big presentation and his father, Hakoda, had to step in and take over. Sokka couldn't stand letting the people who counted on him down, so he made up for it during the invasion, when he helped coordinate the troops. Even after the invasion's painful dust settled, he continued to work hard for his team -- just like a true Executive.