One common theme is redemption. Often, Dudley is portrayed as having a chance to redeem himself through his relationship with fem Harry. Another theme is acceptance, as Dudley has to accept Harry's femininity and her magical world. And of course, friendship can be a theme as they develop a new bond.
A popular fem Harry and Dudley fanfic is 'Dudley's Discovery of Fem Harry'. In this fanfic, Dudley accidentally stumbles upon fem Harry's secret magical training. At first, he's shocked and a bit scared, but as he watches her more, he starts to become curious. The story delves into how this new knowledge changes Dudley's view of Harry and also how it affects their interactions. There are some really heart - warming moments as Dudley tries to understand and accept this new side of Harry.
Well, Harry and Dudley's relationship would change drastically. Harry, by adopting Dudley's child, is taking on a huge responsibility. Dudley might initially be in denial about the whole situation, but as time passes, he realizes that Harry is providing a better life for his offspring. This could lead to a thaw in their long - standing animosity. Harry might start to view Dudley as someone who has made mistakes but is also trying to do right by his child in his own way. And Dudley could start to view Harry as a real family member, someone he can rely on.
One possible fanfic could be where Harry visits Uncle Dudley after the war. Maybe Dudley has had a change of heart and they start to build a tentative relationship. Harry could be there to show that he has moved on from their past differences and is willing to give Dudley a chance to be part of his life in a new way.
Fem Harry in these fanfics usually has a distinct personality. She might be more nurturing, for instance, taking care of younger students at Hogwarts more often. Her magical abilities may also be presented in a different light. Some fanfics show her having an affinity for certain types of magic that the male Harry didn't, like a special connection to nature - based spells. Her social interactions are different too. She could be more involved in the female - centric groups at Hogwarts, which in turn can influence the overall plot as she brings different perspectives and ideas from those groups into the main story.
A common theme is also the exploration of the Muggle - wizard relationship. Dudley, being a Muggle, and Harry, a wizard, their interactions can show how the two worlds can co - exist and understand each other better. Some fanfics also touch on the idea of Dudley feeling left out or inferior because of his lack of magic, and how he overcomes these feelings to build a better relationship with Harry and the wizarding world.
A great 'Harry Potter and Dudley' fanfic is 'Dudley's New Perspective'. In this fanfic, Dudley has an encounter with a magical creature in the Muggle world that makes him question everything he thought he knew about Harry and the wizarding world. It's a really interesting take on their relationship as Dudley slowly starts to change his views.
One common theme is redemption. Many fanfics focus on Dudley realizing his past mistakes and trying to become a better person. Another theme is the exploration of his relationship with Harry. Since they had a rocky start, fanfics often explore how they can reconcile or at least understand each other better.
They might finally have a real heart - to - heart conversation. Dudley could apologize for all the bullying in the past. Harry, being the forgiving person he is, would accept it. Maybe they'd end up becoming friends and sharing stories about their different lives since they parted ways.