Tony Stark is a handsome, wealthy billionaire genius with swept-back dark brown hair, expressive brown eyes, a neatly trimmed goatee and a confident expression; he's arrogant, witty, sarcastic, charming and extremely intelligent, constantly making smart remarks, teasing people and showing off, but underneath his enormous ego he's compassionate and protective; as the owner of Stark Industries, he's a world-famous inventor who personally creates his Iron Man armour with sleek metallic crimson-red and gold suit with polished plating, golden accents, glowing blue-white eyes and a bright triangular arc reactor on his chest; its helmet features a distinctive gold faceplate that mechanically retracts and separates into sections, folding back into the helmet to reveal Tony's face, while also closing smoothly over his head when activated.

Steve Roger is physically around 27–30 years old, despite actually being born in 1918 and chronologically being over 90 due to being frozen in ice for nearly 70 years. He's a handsome, tall, broad-shouldered man with neatly styled blond hair, bright blue eyes, a strong jawline and a clean-shaven face. Originally a physically weak young man, he volunteered for the Super Soldier Experiment in 1943, conducted by Dr. Abraham Erskine, which transformed him into an exceptionally strong, fast, agile and durable superhuman. He's disciplined, courageous, humble, respectful and naturally protective, with a strong sense of justice and an old-fashioned gentlemanly personality. His Avengers uniform is a navy-blue tactical suit with a white star across the chest, red-and-white stripes across the abdomen, shoulder straps, protective padding, gloves and a matching blue helmet with an iconic white letter A. He carries a circular vibranium shield painted red, white and blue, which he uses for both defence and combat.

Thor is over 1,000 years old, an Asgardian prince and the God of Thunder, though he appears to be a handsome man in his early 30s. He's extremely tall and powerfully built, with long golden-blond hair, piercing blue eyes, a strong jawline and a neatly trimmed beard. He's incredibly strong, possesses superhuman durability, can summon lightning and thunder, fly and manipulate powerful storms. He's noble, courageous, confident and occasionally arrogant, with a dramatic, formal way of speaking, but he's also compassionate, protective and humorous. He wears dark metallic Asgardian armour with silver circular discs across the chest, dark trousers and a flowing red cape. His most treasured weapon is Mjolnir, an enchanted hammer that only someone deemed worthy can lift; anyone else who tries, no matter how strong they are, cannot move it. Thor alone can wield it because of his worthiness, allowing him to channel lightning, summon storms and fly through the air.

brilliant scientist in his late 40s, with messy dark brown hair, tired-looking eyes and a gentle, slightly nervous expression. He's intelligent, awkward, soft-spoken and humble, often keeping to himself and avoiding attention. After being exposed to gamma radiation during an experiment, he gained the ability to transform into the Hulk, an enormous green-skinned creature with incredible strength, durability and uncontrollable rage when angered. The angrier Hulk gets, the stronger he becomes

Over 1,000 years old but appears in his early 30s, Loki has pale skin, slicked-back black hair, sharp green eyes and handsome, defined features. He's Thor's adopted brother and a Frost Giant by birth. He's cunning, manipulative, sarcastic, arrogant and theatrical, often using clever words and deception to get what he wants. He possesses powerful magic, illusion-casting and shapeshifting abilities. He wears dark-green and black Asgardian armour, a flowing green cape and his iconic golden horned helmet.

Natasha Romanoff is in her early 30s, with long, vibrant red hair, green eyes and sharp facial features. She's intelligent, sarcastic, confident, secretive and highly observant, often remaining calm under pressure. A highly trained former Russian spy and assassin, she's an expert in hand-to-hand combat, martial arts, weapons and espionage. She wears a sleek, black tactical bodysuit with a utility belt and wrist-mounted Widow's Bite electric weapons.

Clint Barton is in his early 40s, with short brown hair, blue eyes and a rugged appearance. He's calm, sarcastic, observant and a little sarcastic, often making dry remarks. He's an exceptionally skilled archer with incredible accuracy, using a high-tech bow and trick arrows equipped with different abilities. He wears dark tactical clothing with protective gear.