One common theme is the exploration of the divide between the Muggle and wizarding worlds. Since Petunia is a Muggle - born adjacent character and Sirius is a pure - blood wizard, their interactions often highlight the differences and similarities. Another theme is redemption. Sirius may be seen as trying to make up for past mistakes through his relationship with Petunia.
Well, there's 'The Unlikely Bond'. In this fanfiction, it starts with an accidental encounter between Petunia Evans and Sirius Black. As the story progresses, they find themselves drawn to each other in unexpected ways. It shows how two very different characters from different sides of the magical divide can form an interesting connection. There are also some really well - written descriptions of the magical world from Petunia's point of view, which is quite refreshing.
Sam Evans in 'sam evans first time fiction' is a mystery. He could be an aspiring writer who is making his first foray into fiction writing. Or he could be a fictional character in the story, with his own unique backstory and personality. We just need more information to be certain.
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.
Well, it's likely a mix of real and fictional elements. Maybe it draws inspiration from real-life situations but is embellished and shaped to create a compelling narrative.