The first Avenger in the comics was undoubtedly Captain America. He embodies the spirit of heroism and justice and has been at the forefront of protecting the world in the comic books for a long time.
The first Avenger in Marvel Comics is Captain America. His origin story and early adventures set the stage for the Avengers team. He embodies the values of justice and bravery that define the Avengers.
The main characters are Steve Rogers / Captain America, Peggy Carter, and Red Skull. Steve Rogers is the hero who becomes Captain America. Peggy Carter is a strong female character who supports Rogers. Red Skull is the villain leading Hydra.
In some fanfictions, the 7th Avenger could be a time - traveler from the future. This person has come back to prevent a major disaster that the Avengers couldn't handle without their help. They know all about the future events and use this knowledge to guide the team, but also have to be careful not to change the timeline too much.
The main character is obviously Captain America, Steve Rogers. He is the hero who undergoes the super - soldier transformation. Then there's Bucky Barnes, his best friend. Red Skull is also a major character, being the main villain who Captain America has to face.
It's aimed at young readers, probably children aged between 8 - 14 years old. These are the ones who are just starting to get into the world of superheroes and the story of Captain America is a great introduction to concepts like heroism, patriotism and friendship.