Other Avengers might interact with Peter too. For example, Rhodey could befriend Peter and train with him. Or Natasha could teach Peter some spy skills, which could be useful for his superhero activities.
Obviously, Tony and Peter are the main characters. Tony, with his genius intellect and wealth, and Peter, the young and spry superhero. There could also be other characters like Pepper Potts who might be involved in the story, perhaps trying to mediate between Tony and Peter or having an opinion on Tony replacing Peter.
I think Rhodey would be a likely character. He was Tony's close friend, so he would be involved in verifying Peter's claim and guiding him. Also, Aunt May could play an important role. She has raised Peter and now has to come to terms with his new identity. And there could be some other Avengers like Natasha or Clint who knew Tony well and could offer their perspectives on this new family revelation.
Obviously, Tony Stark and Peter Parker are the main characters. Tony is the one making Peter his heir, so he'll be a central figure in guiding Peter and setting things up for him.
Pepper Potts might appear. She could play a role in helping Tony take care of Peter, like making sure he has a proper diet and a comfortable living space in the Stark Tower. She might also be a maternal figure to Peter, giving him advice on relationships and growing up.
Obviously, Peter (presumably Peter Parker, Spider - Man) would be one of the main characters. And of course, the Avengers members like Iron Man, Captain America, Thor, Hulk, Black Widow, and Hawkeye are likely to be main characters too as they are the ones 'meeting' Peter.
The main characters are Peter and the Avengers. But we might also see some side characters like Happy Hogan who could be involved in some way. Maybe he's the one who arranges the initial meeting between Peter and the Avengers. And Pepper Potts could also make an appearance, giving her take on Peter's presence in the Avengers' world.
Well, obviously Peter Parker (Spider - Man) is one of the main characters since the story is about rescuing him. Then, of course, the Avengers. This would include Iron Man (Tony Stark), who would likely use his high - tech gadgets and suits to help in the rescue. Captain America (Steve Rogers) would bring his leadership and combat skills. Thor with his godly powers would also be a key figure, and Hulk (Bruce Banner) could provide brute force when needed.
Obviously, Harley would be one of the main characters as she is replacing Peter. And characters like Aunt May could still be in the story. She might be a bit confused at first about this new person in Peter's place.
Well, clearly Peter Parker and Tony Stark are the main characters. Peter is the one who 'snaps' in this scenario, which means he has a significant character shift from his normal self. Tony, on the other hand, serves as a sort of contrast or the catalyst for Peter's snapping. Even though Peter is the one with the new behavior, Tony's presence and actions are likely to be integral to the story as they are what cause Peter to snap.
It's not just about Tony and Peter though. There could be mentions of other characters in the Marvel universe as well. For instance, Tony might bring up Steve Rogers to give Peter an example of a different kind of hero. Or he could talk about Pepper Potts to give Peter some perspective on how normal relationships can work even in the midst of all the superhero chaos.