There are fanfics that focus on Aunt Petunia's internal struggle. She had to take in Harry, a boy she clearly didn't fully understand or like at first. Some fanfics might delve into how she slowly starts to see Harry in a different light, perhaps after seeing his courage or his own struggles at Hogwarts. For example, she might have a moment of realization when she hears about the dangerous situations Harry faces at school and starts to feel a bit of protectiveness towards him.
In some 'Harry Potter Aunt Petunia' fanfics, they might rewrite the story from her perspective entirely. This could include her memories of the night Lily died and how she dealt with the sudden appearance of baby Harry on her doorstep. It could also show her interactions with the wizarding world in a more detailed way, like when she gets a visit from a wizard or witch and how she copes with that intrusion into her 'normal' life.
One interesting 'Harry Potter Aunt Petunia' fanfic could be the ones that explore her relationship with Lily before she passed away. It might show how they grew up together and how their bond changed over time. Maybe there are fanfics where Aunt Petunia has to face her own insecurities regarding magic and her sister's special abilities.
There are fanfictions where Aunt Petunia has a change of heart towards Harry much earlier in the story. Instead of treating him badly, she starts to secretly teach him some basic things about the wizarding world that she learned from her sister Lily before she passed away. This could add a whole new dynamic to Harry's early years at the Dursleys.
One interesting 'Harry Potter Petunia Dursley' fanfic could be one that explores Petunia's childhood and how her relationship with Lily might have affected her view of Harry. For example, a fanfic could show that deep down, Petunia was always a bit envious of Lily's magical abilities, but also loved her sister in a complicated way. This envy could have then translated into her cold treatment of Harry.
Fanfiction.net is a great place to start. It has a large collection of 'Harry Potter' fanfics, and you can easily search for ones specifically about Aunt Petunia. Just type in 'Aunt Petunia' in the search bar and browse through the results. You might find some real gems there.
She is very much concerned with appearances and normalcy. In the Dursley household, everything has to be in a certain order and conform to what she deems as a proper, non - magical lifestyle. This is part of the reason she is so resentful of Harry and his magical abilities.
Perhaps Aunt Petunia is a witch who was cursed long ago. The curse made her forget her magic and act like a Muggle. When Harry unknowingly breaks the curse, she suddenly has her powers back. She then has to face the wizarding world again and deal with all the changes that have occurred since she last remembered her true self. She might even have some unique powers that are different from the norm because of the curse.
One possible plot line could be Aunt Petunia having a change of heart towards Harry due to some magical event in the fanfiction. Maybe she discovers a hidden side of magic that makes her see Harry in a new light.
One interesting 'Harry and Aunt Petunia' fanfiction could be about Aunt Petunia having a change of heart and secretly protecting Harry from other threats in the wizarding world. Maybe she starts to understand the importance of magic and realizes she can't let her sister's son be in constant danger.
One possible fanfiction could be about Aunt Petunia having a strange encounter with a lemon - themed magical object. Maybe she accidentally uses it in a spell (in a non - canon, fan - created way) that makes her see a different side of the wizarding world she has always despised. This could lead to her having a change of heart about Harry Potter and his world.
Well, it could be quite strange. Maybe she's secretly a bit more interested in the wizarding world than she lets on. It might be a way for her to explore the stories from a different perspective, one that's not as judgmental as her usual self towards magic.
The main interesting aspect is the contrast. Harry is a wizard from a magical world, while Petunia is a Muggle who resents that world. Fanfics can explore how these two very different characters interact and influence each other.