Leader: Steve Rogers/Captain America

Members: Tony Stark/Iron Man, Thor Odinson, Carol Danvers/Captain Marvel, T'Challa/Black Panther

Affiliation: S.H.I.E.L.D., United Nations

Base of Operations: Avengers Tower

The Avengers are the world's premier superhero team, tasked with protecting and saving the world from superhuman, extraterrestrial, supernatural, and interdimensional threats. Nicknamed "Earth's Mightiest Heroes", the members of Avengers are considered as extraordinary champions with powerful abilities, and their unbreakable willpower along with their strength in union makes them the strongest.

History

The team was first founded when Loki, the Asgardian God of Mischief, attempted to lead an invasion of Earth with the army of aliens known as the Chitauri. His brother, Thor, went to Earth to bring Loki back to Asgard. On Earth, Iron Man, Captain America, and Captain Marvel were called to action by Nick Fury, who are also joined by Black Panther, who was in America tracking down black arms dealer Ulysses Klaue who was smuggling vibranium. Together, they manage to drive out the Chitauri and defeated Loki. After that, the five heroes decided to join forces and form the Avengers, and using Stark Tower, now rebranded as Avengers Tower, as their headquarters.

From then on, the Avengers would face many threats, including Ultron, a malicious artificial intelligence created by Dr. Hank Pym, the first Ant-Man, who tried to wipe out humanity out of disgust, Hydra, a terrorist organization led by Red Skull, a Nazi super soldier and Captain America's arch nemesis who was believed to be perished in WWII, Doctor Doom, a powerful supervillain who is the ruler of Latveria, A.I.M., a criminal organization and a think tank of scientists dedicated to world domination led by MODOK, The Masters of Evil, a supervillain team led by Baron Zemo, Kang the Conqueror, a time-traveling terrorist, and Thanos, a powerful galactic warlord who tried to wipe out half of universe's population with the Infinity Stones, six powerful crystals that were manifestations of universe's aspects; Power, Space, Reality, Soul, Time, Mind.

The team is later joined by Wanda Maximoff, Scarlet Witch, a powerful sorceress who is the daughter, who joined the main Avengers and became prominent member afterwards. However, after the seeming death of her twin children Tommy and Billy at the hands of Ultron, she suffers a psychotic break and warps reality to create an alternate reality, but they manage to break away after Iron Man discovers change in reality and restore the rest of the Avengers' memories. 

They eventually learn that Wanda was possessed by Chthon, an evil Elder God who created a dark grimoire known as the Darkhold which Wanda attempted to use to enhance her powers to restore her children but instead possessed her mind. The Avengers save Wanda, but she sacrifices herself to destroy Chthon and the Darkhold. They hold a funeral for Wanda afterwards.

In the aftermath, the Avengers found themselves pitted against the U.S. government as well, especially from Henry Peter Gyrich, their government liaison who had the president signed the Superhuman Registration Act after the incident with Scarlet Witch. He also has them reveal their identities or disband, which they do after becoming disgusted with Gyrich's actions. To make matters worse, Gyrich now has other superheroes hunted down by the Thunderbolts, a team of former supervillains, and dissolved S.H.I.E.L.D. as well.

However, the Avengers would reunite again, when Nick Fury, discovers a conspiracy revealing that the actions of Scarlet Witch and the Superhuman Registration Act was all conspired by Orchis, an organization dedicated to eradication of all superhuman beings, formed from ranks of S.H.I.E.L.D., S.W.O.R.D., A.I.M., and HYDRA. Fury is killed by Norman Osborn, a former supervillain Green Goblin and now leader of new version of S.H.I.E.L.D. called H.A.M.M.E.R., which acts as a cover for the Orchis, but he manages to sent out a message to Tony Stark. After learning the truth, Stark reactivates the Avengers protocol and reassemble the team once again, now to fight against their true enemy: Orchis.

Members

Steve Rogers / Captain America

VA: Brian Bloom (ENG), Yoshimasa Hosoya (JAP)

The leader of the Avengers. He was part of U.S. Government's Project: Rebirth, in which after being injected with the Super Soldier Serum and exposed to Vita-Ray, his physique has been enhanced to the point possessing superhuman physical abilities. As a super soldier, he fought in WWII while wielding a shield made out of Vibranium. At the end of the war, he was frozen in ice while stopping a Nazi bomb but later was saved by other Avengers.

Tony Stark / Iron Man

VA: Mick Wingert (ENG), Daisuke Namikawa (JAP)

A genius billionaire who uses high tech armor with many weaponry. He has become a hero after learning that the weapons he was manufacturing were used by the wrong hands, in which it left him with a serious heart injury.

Thor Odinson

VA: Travis Willingham (ENG), Yasuyuki Kase (JAP)

An Asgardian and Norse God of Thunder, and currently the King of Asgard as the Skyfather. He wields the Mjolnir, a powerful enchanted hammer forged from Uru, a metal made of heart of a dying star, which is capable of controlling lightning and storms.

T'Challa / Black Panther

VA: James C. Mathis III (ENG), Hiroki Yasumoto (JAP)

The King and protector of African nation of Wakanda. He wears a suit that contains Vibranium, which is rich in his nation that allows him to absorb and release kinetic energy, while having superhuman abilities from ancient Wakandan rituals of drinking the essence of a heart-shaped herb.

Carol Danvers / Captain Marvel

VA: Grey DeLisle (ENG), Miyuki Sawashiro (JAP)

An US Air Force officer who became half-human and half-Kree after having her DNA fused with a Kree-based technology and gained superhuman strength, invulnerability, interstellar flight, and cosmic energy manipulation.