Natasha Romanoff, better known as Black Widow, is one of the most talented spies and assassins in the entire world and a founding member of the Avengers. Originally an agent of the Soviet agency for foreign intelligence, the KGB, she later became a member of S.H.I.E.L.D., the international counter-intelligence agency.
Quentin Beck is a former employee at Stark Industries who became embittered as Tony Stark disregarded his entire life's work, resulting in Beck losing his job.
Harold Joseph "Happy" Hogan is one of Tony Stark's closest friends and his personal chauffeur who formerly worked as his personal bodyguard and Head of Security of Stark Industries.
Maria Hill is the former Deputy Director of S.H.I.E.L.D., and also held the title of "Commander". She enjoyed a well-deserved reputation as tough-minded and by the book. Her clear-headed pragmatism was a valued source of reason during the critical discourse surrounding the Avengers Initiative.
Michelle Jones, also known as MJ, is a student at Midtown School of Science and Technology, who greatly enjoyed mocking all of her fellow students there, which included Peter Parker.
Colonel Nicholas "Nick" Joseph Fury was a former officer of the US Army and an espionage veteran of the CIA during the Cold War. He joined S.H.I.E.L.D., a covert international peacekeeping organisation which operates as humanity's first line of defense against Earth's most dangerous enemies.
Peter Benjamin Parker is a high school student and a superhero with spider-like abilities, fighting crime as his alter ego Spider-Man. After receiving his abilities from a spider's bite, Parker chose to protect Queens from crime with his powers, juggling all of his superhero duties and the demands of his high school life.
Captain Maria Rambeau is a former United States Air Force pilot with the callsign Photon and a single mother to Monica Rambeau.
Anthony Edward "Tony" Stark is an eccentric self-described genius, billionaire, playboy and philanthropist and the former head of Stark Industries. Using his own great wealth and exceptional technical knowledge, Stark enjoyed the playboy lifestyle for many years until he was kidnapped by the Ten Rings.
Scott Edward Harris Lang is a former professional criminal who, despite trying to go straight to raise his daughter, was convinced by Hank Pym to take on the mantle of the Ant-Man.
Yon-Rogg is a Kree Empire commander and leader of Starforce, with a devout loyalty to the Supreme Intelligence and the Kree ideologies.
Cassandra "Cassie" Lang is the daughter of Scott and Maggie Lang.
Ronan was a radical Kree warlord and former member of the Accusers.
Peter Jason Quill is a half-human, half-Celestial who was abducted from Earth by the Yondu Ravager Clan in 1988. After his abduction, he began building fame as the legendary outlaw Star-Lord.
Clinton Francis "Clint" Barton, better known as Hawkeye, is a former special agent of S.H.I.E.L.D., where he worked under the supervision of Phil Coulson. Known for his use of the bow and arrow as his primary weapon, Barton became one of S.H.I.E.L.D.'s best agents and assisted in the recruitment of Black Widow, whom he developed a strong friendship with.
M'Baku is the leader of the Jabari Tribe, a group of Wakandans who have removed themselves from mainstream society.
89P13 is a genetically enhanced furred animal turned freelance criminal, calling himself Rocket. Alongside his friend and partner Groot, Rocket travelled the galaxy picking up bounties until they met Star-Lord who then convinced them to assist him to sell the Orb for a massive project.
Drax, also known as Drax the Destroyer, was a former intergalactic criminal and a member of the Guardians of the Galaxy.