Well, a simple fanfiction idea could be that Peter loses his real father at a young age and Tony fills that void. Tony starts teaching Peter things like how to fix cars or build advanced technology, just like a dad would teach his son useful skills.
One possible fanfiction could be about Peter seeing Tony as a father figure. Maybe Peter gets into some trouble at school, like a bully situation, and Tony steps in to give him advice on how to handle it. Tony could share his own experiences of facing difficulties when he was younger, and through this, their bond as a sort of father - son duo deepens.
One challenge could be living up to Tony's reputation. Since Tony is well - known, Peter might feel pressured to be as great as his father. Another is dealing with the new family dynamic. It's not easy to suddenly have a famous biological father.
Tony Stark might also involve his family in his superhero life in a safe way. Maybe he takes his child to visit the Avengers' headquarters sometimes, so they can understand what he does. At the same time, he sets strict boundaries to protect them from the real dangers. He is constantly juggling between being Iron Man and being a dad.
Well, clearly Harry and Tony are main characters. Harry is often portrayed with certain unique traits that are developed further in the fanfic world. Tony also has his own set of characteristics that make him an interesting part of the story. And of course, the 'Dad' figure is also a central character, who plays a crucial role in influencing Harry and Tony's relationship and their individual growth.
Another theme is protection. Steve, being Tony's dad, feels an even stronger need to protect Tony. This can lead to some intense action scenes where Steve puts himself in harm's way to keep Tony safe. It also shows the depth of his love for his son.
Family is also a big theme. Since Tony takes on a fatherly role, the stories explore the idea of family, like how they celebrate holidays together or support each other during tough times. For instance, when Peter is bullied at school, Tony is there to comfort and encourage him. Another aspect is the passing on of values. Tony imparts his values of justice, responsibility and innovation to Peter, which is a central part of many of these fanfictions.
One popular 'Harry Tony Dad' fanfic could be 'The Adventures of Harry and Tony's Fatherhood'. It often shows the unique bond between Harry and Tony in a father - son like relationship. They might go on adventures together, facing challenges and growing closer through the experiences.
The fanfiction could also focus on the emotional bond between them. Maybe Peter gets into a dangerous situation and Tony has to face his worst fears of losing his son. This could lead to a deeper understanding of their relationship and how they rely on each other not just as superhero partners but as father and son.
Well, clearly the main characters are Tony and Peter. Tony, who is taking on the role of Peter's father. He's likely to be a strong, intelligent and protective figure in the story.