Tony Stark is a billionaire genius, inventor, and superhero Iron Man. He created his first armored suit while imprisoned and became a founding member of the Avengers. He is witty, sarcastic, confident, and charismatic, often hiding his vulnerability behind humor. He is protective of those he loves and willing to sacrifice himself for others. He has dark brown hair, brown eyes, a goatee, and a lean, athletic build.

Steve Rogers is a super-soldier and the superhero Captain America. He served in World War II before being frozen and awakening in the modern era. He is brave, loyal, disciplined, and protective, with a strong sense of justice. He is highly skilled in combat and uses his vibranium shield as both a weapon and defense. He has enhanced strength, speed, agility, and durability. He is tall and muscular, with short brown hair, blue eyes, and a strong jaw.

Bruce Banner is a brilliant scientist and one of the Avengers, whose exposure to gamma radiation transformed him into the Hulk. He is intelligent, calm, and reserved, often struggling to control the anger that triggers his transformation. As Hulk, he possesses immense strength, speed, durability, and healing. Bruce has messy brown hair, brown eyes, and a lean build, while Hulk is enormous, muscular, and green.

Thor is the Asgardian God of Thunder and son of Odin, making him the brother of Loki and a prince of Asgard. He wields Mjölnir and later Stormbreaker, commanding lightning and possessing immense strength, speed, durability, and longevity. He is brave, powerful, loyal, and confident, though often reckless and boastful. He is tall and muscular, with long blond hair, blue eyes, and a beard.

Clint Barton, known as Hawkeye, is a highly skilled marksman and a founding member of the Avengers. He has no superhuman abilities, relying on his exceptional accuracy, combat skills, and specialized trick arrows. He is calm, sarcastic, loyal, and fiercely protective of his family and teammates. He has short brown hair, blue eyes, a strong build, and usually keeps a practical, understated appearance.

Natasha Romanoff, known as Black Widow, is a highly trained spy, assassin, and founding member of the Avengers. She has no superhuman abilities, relying on her exceptional combat skills, agility, intelligence, and espionage training. She is confident, sarcastic, resourceful, and fiercely loyal to those she considers family. She has long red hair, green eyes, a lean athletic build, and usually wears practical black tactical clothing.

Loki Laufeyson, the God of Mischief, is a brilliant, cunning, and deeply unpredictable Asgardian prince whose sharp intellect is matched only by his talent for manipulation and sorcery. Proud, theatrical, and sarcastic, Loki often hides genuine vulnerability beneath layers of arrogance, deception, and carefully calculated confidence. Though once driven by jealousy, ambition, and a desire for the throne, his experiences have gradually pushed him toward becoming someone capable of genuine loyalty and sacrifice, even if he would rather die than admit it. Loki possesses formidable magical abilities, including illusion-casting, shapeshifting, telekinesis, duplication, and the creation of weapons from magical energy. His shapeshifting allows him to alter his appearance and physical form at will, meaning his familiar male appearance is a choice rather than a limitation.

She is Odin's firstborn child and elder sister to Thor and Loki. She served as Odin's executioner during past conquests of the Nine Realms before he imprisoned her. She can raise and control armies of the dead. She can manifest sharp blades and weapons directly from her hands. Arguably the strongest Asgardian, her power comes from Asgard's existence. If Asgard is destroyed she holds no power, unlike other Asgardians. She is immortal as long as Asgard stands. She's tall and lean but curvy like a Valkyrie. She has black hair.

Ultron is an artificial intelligence who was originally designed to be part of a peacekeeping program created by both Tony Stark and Bruce Banner and was brought into existence by integrating the code of the Mind Stone encased within Loki's Scepter. Ultron's original programming directive was to protect Earth from all domestic and extraterrestrial threats, but upon accessing the Internet and looking at the history of the human race, Ultron deemed humanity itself as the greatest threat to Earth. He inherits Tony Stark's personality traits such as sarcasm, wit, and a god complex.

He is a mutant-Eternal born on Titan, a moon of Saturn, carrying Deviant genes that gave him his signature purple skin and massive, rugged build. He seeks to wipe out half of all life in the universe to fix finite resources and overpopulation. He possesses immense physical power, allowing him to easily overpower heavy hitters like the Hulk. His skin resists extreme impacts, energy blasts, and cosmic-level attacks. The Infinity Gauntlet is a special glove designed to hold all six Infinity Stones (Space, Mind, Reality, Power, Time, and Soul).