Well, in a lot of Petunia and Harry fanfictions, an alteration can be how their pasts are connected. Some fanfics might explore if Petunia had some sort of latent magical ability that she hid, and this could change how she views Harry's magic. It could also lead to her teaching Harry things about magic that she learned in her own way. Regarding Harry, his view of the Muggle world through Petunia could be different. He might come to understand and appreciate the Muggle side of his family more deeply, which is a big alteration from the original story where he was often at odds with the Dursleys.
They can make the plot more complex. If Petunia is suddenly nicer to Harry, it changes the dynamic at the Dursleys' house. Harry might not be as eager to leave for Hogwarts, or he could have a different attitude towards Muggles in general. For example, if Petunia helps him with his magic studies secretly, he could be more advanced when he gets to Hogwarts, which would change his interactions with classmates and teachers.
Well, it depends on the specific fanfiction. Some fanfic authors like to play around with the relationships and concepts in the Harry Potter universe. So it's possible that in certain fanfictions, Petunia is Harry's pet. However, in the canon story, Petunia has a very different role as Harry's rather unfriendly aunt who begrudgingly takes him in. But fanfiction allows for all kinds of creative interpretations.
One great Petunia fanfiction could be one where she has a moment of self - realization. Maybe she discovers some of Lily's old magic things and starts to understand the wizarding world better. It could show her in a more sympathetic light, perhaps she even tries to protect Harry in her own way.
In the world of 'Harry Potter' fanfiction, most writers tend to stay within the boundaries of the original story's spirit. The concept of Harry Potter impregnating Petunia is so far - fetched and inappropriate that it is highly unlikely to be a part of any well - regarded fanfiction. Fanfiction usually focuses on exploring relationships that are more in line with the potential of the characters as presented in the original, like friendships, romantic relationships among peers, or the growth of the characters within the magical world.
One popular theme is the exploration of Petunia's jealousy towards Lily. In fanfiction, this can be delved into deeply, showing how it might have affected her relationship with Harry. For example, some stories might show Petunia struggling with her feelings of envy for Lily's magical abilities and how that spills over into her treatment of Harry.
One common theme is redemption. Often, Petunia is portrayed as having a chance to redeem herself for her past treatment of Harry. For example, she might finally show some love or understanding towards him.
Well, it depends on your definition of 'good'. Some might focus on the complex relationship between Petunia and the magical world in the context of Harry Potter, while others might take a more creative or off - beat approach. You really have to dig through different works to find one that suits your taste. There could be some that explore Petunia's character in depth, perhaps showing her envy of the wizarding world in a new light, or creating a scenario where she has a more positive interaction with the magical elements, which could be quite interesting to read.
One possible fanfiction could be about Petunia discovering her latent witch powers later in life. Maybe she stumbles upon an old family heirloom that unlocks her magical abilities. This could lead to a whole new dynamic in her relationship with Harry, as she now understands the world he belongs to on a deeper level.
Yes, there are some out there. You can start by looking on fanfiction platforms like FanFiction.net or Archive of Our Own. Some writers might explore an alternate universe where Vernon and Petunia show love towards Harry in a more positive way, perhaps due to a change in circumstances or a different understanding of his situation.