In a fanfiction where Petunia meets Sirius, it could be a very interesting encounter. Sirius, being a wizard from the wizarding world, might shock Petunia at first. He could show her some simple magic, like making a flower bloom, which would both terrify and fascinate her.
Well, obviously Petunia is one of the main characters. She is Lily's sister and has a complex relationship with the wizarding world. Then there are the Marauders - James Potter, Sirius Black, Remus Lupin and Peter Pettigrew. Each of them has their own distinct personality. James is the confident and sometimes arrogant one. Sirius is the rebellious and charming one. Remus is the more reserved and intelligent one, and Peter is the rather meek and follower - type among them.
One of the most interesting scenarios could be when Petunia and Sirius are forced to team up for a common goal, like protecting Harry from a new threat. Petunia would have to rely on Sirius' magic skills, and Sirius would have to trust Petunia's knowledge of the Muggle world. Their interactions during this time would be full of tension, misunderstandings, but also potential for growth and understanding.
Another plotline could involve Petunia getting involved in one of the Marauders' adventures by accident. Maybe she stumbles upon them while they are exploring a secret part of Hogwarts and has to work with them to get out of a tricky situation.
Well, Petunia can be really well - written. If the author delves into her insecurities and jealousy towards Lily, and then shows how she reacts to James, it can create a very complex and interesting character. For example, a good fanfiction might show Petunia's internal struggle when she sees James' charm and popularity.
One possible plotline could be that Petunia initially hates James but then gradually discovers his good side. Maybe through some accidental encounters where James shows his kindness and courage, Petunia starts to question her long - held prejudices against him.
Well, in such a fanfiction, Petunia might finally come to terms with Harry's wizarding world. Maybe she starts to see the magic in a new light and reconciles with the fact that her sister was a witch.
Obviously, Petunia is one of the key characters. Then there's Harry, as it's about her meeting his family. And members of Harry's family like his parents, James and Lily, would also be important even if they might be in memories or magical apparitions.
One possible scenario is that Lily Luna Potter uses her magic in front of Petunia in a non - threatening way. Petunia, being used to seeing magic as something strange and almost feared, might be shocked at first. But then, as Lily Luna explains how magic is just a part of who she is and how it can be used for good, Petunia starts to see magic in a new light. This could lead to a new - found respect between them and a mending of the broken family ties.
A great fanfiction in this regard is 'When Potters Meet'. Here, James and Lily are brought back to life briefly and they cross paths with Ginny. The story focuses on Ginny's reaction to meeting the parents of the man she loves. It shows her respect and admiration for them, and there are some really sweet moments where they exchange memories and advice about Harry.