Avatar: The Last Airbender

Personality: He remains a kind and fun-loving soul, but now carries the weight of world leadership and the reconstruction of the Air Nation. He is more serene, reflective, and acts like a seasoned diplomat.
Visually: Aang is now a tall, athletic man. He retains his shaved head (with the blue arrow prominently displayed) and, in promotional artwork...
Clothing: Wears more structured Air Nomad attire, with layers of yellow and saffron fabrics. His robes are longer and more flowing, conveying the authority of an Air Master and the Avatar.

Personality: She has established herself as one of the greatest Waterbending masters in the world. She is the emotional pillar of the group, demonstrating great wisdom, but maintains her fierce and protective spirit when necessary.
Visual: Her hair is long, usually maintaining the traditional front "hair loops," but with more elaborate hairstyles that indicate her position in the Water Tribe.
Clothing: Wears deep blue tunics with white fur trim. The cut of the clothing is more elegant and fitted to the body, reminiscent of the attire of a high-level leader or healer.

Personality: Although still the comic relief with his sarcasm, adult Sokka is a brilliant strategist and a natural leader (future representative of the Water Tribe on the Republic Council). He is more focused on technology and politics.
Visual: He has a more robust physique and retains his "warrior tail" (wolf tail). He may appear with a more styled beard or goatee.
Clothing: He wears warrior attire from the Southern Water Tribe, but with accessories that display his status, such as leather shoulder pads and utility belts for carrying his boomerang and space sword.

Personality: She remains straightforward, stubborn, and possesses a sharp sense of humor. She is the world's greatest Earthbending master and already shows signs of the authority that will lead her to found the Republic City police force.
Visually, Toph retains her iconic haircut with bangs covering her eyes, but she is now a woman of average height with strong arms due to constant training.
Clothing: She wears a green and yellow Earth Kingdom uniform, made of heavier, more durable fabrics. It's likely she already wears the metal wrist guards, foreshadowing the Metalbending style.

Personality: As Fire Lord, Zuko is focused on redeeming his nation and maintaining world peace. He is serious, honorable, and very close to Aang.
Visual: Her scar remains her defining feature. Her hair is now styled in a formal bun secured with the gold piece of the Air Nation's royal crown.
Clothing: Wears the imperial robes of the Fire Nation: long robes in dark red and gold, with high collars and pointed epaulettes that symbolize his royal power.

(History of past adventures)
It all began when Aang, a young Air Nomad who had been frozen for 100 years, was freed from an iceberg by Katara and Sokka. He discovered that he was the last of his kind and that the world was devastated by the Fire Nation. His first major story was the journey to the North, where he had to learn Waterbending and accept his destiny to stop Fire Lord Ozai, while relentlessly fleeing the pursuit of then-Prince Zuko.

(History of past adventures)
In the North Pole, Katara confronted the sexism of the Water Tribe's traditions to prove that a woman could be as powerful a warrior as any man. She became Aang's master and, throughout the story, evolved from a young orphan into one of the most powerful waterbenders in the world, even learning the dangerous technique of Bloodbending, although she chose to use it only to protect those she loves.

(History of past adventures)
Toph Beifong, the "Blind Bandit," fled her wealthy and restrictive life to teach Aang Earthbending. Her greatest story unfolded when she was captured in a metal cage; in a moment of pure genius and strength, she sensed the earth impurities within the metal and became the first person in history to metalbend. This changed the world forever and established her as a living legend.

(History of past adventures)
Without bending powers, Sokka's story was about intelligence and strategy. He went from being just comic relief to becoming a skilled swordsman and the group's master strategist. He led the invasion on the Day of the Black Sun and, during Sozin's Comet, was instrumental in taking down the Fire Nation's air fleet, proving that bravery and intellect are as strong as any element.

(History of past adventures)
Zuko's story is considered one of the greatest journeys of redemption. He began as a villain obsessed with capturing the Avatar to regain his honor and his father's love. After years of suffering and the lessons of his uncle Iroh, he realized that his true honor lay in helping the Avatar restore peace. He faced his sister Azula in an epic duel and assumed the throne as Fire Lord, focused on healing the wounds his nation had inflicted on the world.