Natalia Romanova or Natasha Romanoff grew up in the Red Room. The red room took unwanted girls to make them Widows. This means Natasha Romanoff's childhood got taken away from her. She had to fake being in a family when she was about 12 years old before she went back to the Red Room. When she escaped the Red Room she was on the run. When she was on the run Hawkeye was sent to kill her. Hawkeye didn't want to because he could tell she didn't want to do what she was forced to do. He helped her become a S.H.I.E.L.D agent. After that she was sent to spy on Iron Man and help him. She then became one of the only woman on the Avengers. She sadly died when she was helping get the Avengers and the other half of the universe back when Thanos snapped them away.
Anthony Stark or Tony Stark is best known because of his father and his inventions. He is also known for being a billionaire, genius, playboy, and philantropist. When Tony was about 25 years old his parents died due to the Winter Soldier killing them. Tony built the ironman suit after he got the core reactor. The core reactor is the reason he was still alive. He got married to Virgina Potts. But everyone calls her Pepper. When the universe got dusted away. After awhile trying to get everyone back he realized he couldn't do anything. After he stopped trying, he and Pepper had a child. They named her Morgan Stark. When they were able to get everyone back Tony had to snap his fingers with the Infinity stones. He did this so Thanos and his team would disappear and wouldn't come back. Because of this he died. The power of the stones was too powerful for his body.
Bruce Banner is known as a great scientist. When he was trying to recreate the super soldier serum (which was used on Steve Rogers). But it backfired and it created gamma radiation. The gamma radiation caused him to share a body with the Hulk. The Hulk is a big, green monster. The only way the Hulk comes out is when Bruce gets really mad. Bruce has tried to kill himself on multiple occasions but Hulk won't allow him to die. To sum that up, Hulk is preventing and protecting Bruce from death.
Thor Odinson is the God of Thunder. He is one of three people who can hold/ stop the mighty hammer Mjollnir. His adopted brother Loki was always jealous of him because their father favorited Thor. Thor became King of Asgard (their home). Loki was so jealous that when they went to destroy the Frost Giants Loki told Odin(their dad) that they were going so that Odin would stop Thor. Because of this Thor was sent to Earth to learn from his mistakes. Loki at that time became King after Odin had past out and wouldn't wake up. While Thor was on Earth he would try to pick up Mjollnir but he couldn't because Odin stopped him from picking it up. After that Loki was put in jail on Asgard. Thor was then asked to join the Avengers. He did join. Thor has 4 movies. Thor, Loki, and Odin are gods if you didn't know.
Steve Rogers who is known as Captain American, was a little skinny kid from Brooklyn, New York. He wanted to be in the army. But due to his height and weight he wasn't able to. Until Professor... helped him get into military camp. In the military camp they were trying to find someone who was worthy to get the super soldier serum. The main guy at the camp was doubting him. But when Professor... threw a fake bomb Steve was the only one who used his body to protect he people around him. While all this was happening Steve fell in love with Peggy Carter, but that isn't important right now though. After he got the serum he got taller and he got muscles. Because of this he became an icon (you could say). But when he was at war he had to crash a plane into the ocean. Which causes him to freeze. But he doesn't die because of the serum.
Clint Barton is/was a S.H.I.E.L.D agent. He is a great archer. We don't really know about his past. He was supposed to kill the Black Widow because she was a threat. He didn't kill her though because he could tell that she didn't want to do what she was trained and forced to do. So instead of killing her, he helped her become a great S.H.I.E.L.D agent. Clint was also controlled by Loki when he was trying to take over Earth to become king. Clint is married and has 3 kids. His whole family got dusted away and he became Ronan. He became Ronan to kill people who had done bad things and to deal with his grief. He and Natahsa went to Vormir where Natahsa died. We don't real know much about him but this is what we know.
Wanda Maximoff has powers like nobody else. Wanda's parents were killed by a Stark Indestry bomb when her and her brother(Pietro Maximoff) were 10 years old. Then when they were about 15 or 20 years old they signed up to become Hydra test subjects. They did this because they had no were else to go. She helped Ultron before she and Pietro found out what he actually wanted to do with the universe. Ultron is a robot who was created by Tony Stark and Bruce Banner. Ultron then created. They both became Avengers. She soon fell in love with the Vision(you will find out more about him and Pietro later). Then Pietro and Vision died. She created this thing we call the Hex where she and Vision could live their lives how she wanted them. She based them off of Sic-Com's. She and Vision had twin boys (Billy and Tommy Maximoff). But she had to close the hex to protect everyone who was in there. But in the process of all that she meets a witch Agatha Harkness. Because of her, Wanda became the Scarlet Witch. After the show ended we got to see Wanda trying to bring back her kids. That's all we know right now. We will find out more about what she is doing in Doctor Strange and the Multiverse of Madness
Pietro Maximoff has speed for his powers because of the Hydra Experiments. Pietro Maximoff is Wanda's twin brother. Pietro is 12 minutes older. He and Wanda were stuck under a bed wondering when the Stark Indestry bomb was going to exploded and kill them. After a few years when they were 15-20 years old they signed up to become Hydra test subjects. After Wanda had read Visions mind(Ultron had created Vision). They both joined the Avengers to help defeat Ultron. Pietro sadly died after Ultron was flying a jet that was shooting. He died preventing Clint from dying when he was trying to help some kid try to get back to his parents.
Vision was created by Ultron. Vision was created to destroy the world. Ultron had processed his mind before the Maximoff twins and the Avengers stopped the process before it continued. Then in Avengers Infinity War. Wanda had to take the mind stone out of his head before Thanos could get it and snap half of the universe. Wanda had to watch Vision die three times.. This is because Wanda had destroyed the stone but Thanos had the time stone which can see the future and travel to the past. Thanos got this stone from Doctor Strange. After Wanda destroyed the stone Thanos reversed time and got the stone before Wanda could stop and destroy it again.The third time was when she had to take down the Hex to protect the other people.
Peter Parker has lost everyone that cares about him and who he cares about. Peter was rumored to have lost his parents when he was about 5 years old. He is also rumored to be the little boy in the Iron Man helmet in Iron Man 2. When he was 15 years old Tony Stark (Iron Man) said he needed his help but Aunt May didn't know what the real reason was or who Peter was. This all took place in Captain America Civil War. Peter also didn't know the reason that Tony needed his help. Peter then got dusted away in Avengers Infinity War. He and many others were able to come back after 5 years. Then in that battle (Avengers Endgame) he lost Black Widow (she was like a mother figure to him) and Iron Man (he was a father figure to him). Then in Spider Man No Way Home, everyone figured out his identity and came after him. He went to ask Doctor Strange for help but he kept messing with the spell so the other Spider man (Tobey Maguire and Andrew Garfield) and most of their villains. During the movie he lost Aunt May, his friends, and his girlfriend(Mj).
James Buchanan (Bucky) Barnes is Steve Rogers' best friend. Bucky helped him not get bullied, hang out/ talk to people, ect. Bucky was the reason Steve was able to get into the military camp. Bucky was already in the military. Bucky was getting ready to go to war. After Steve got the serum he got Bucky who had gotten taken by Hydra. Bucky then fell off the train when they were going to go fight Red Skull (Hydra). Bucky then got taken to become a Hydra agent. He had his left arm chopped off and replaced with a metal one. Bucky's next appearance was in Captain America the Winter Soldier. Steve, Natasha, and Sam (Falcon) helped him get his memory back. He went to Wakanda (where Black Panther lives) to help get the Winter soldier out of his head. Then in Falcon and the Winter Soldier, we see him talking to his therapist. He and Sam had to deal with the new Captain America (John Walker) who had killed someone with the shield (the shield never had blood despite the amount of people Steve Rogers fought). Last time we saw Bucky he was helping Sam fix his boat so Sam's sister wouldn't sell it.