Draco Malfoy could be a character in this type of fanfiction. He often has a rivalry with Harry, and his presence during Snape's examination could create some tension. Professor McGonagall might also be there. She cares about Harry and would want to ensure that the examination is fair. And then there are the Weasley twins. They might use the situation as an opportunity for some mischief or to play a prank on Snape while he's examining Harry.
Luna Lovegood might be in the fanfiction. She has a unique perspective on magic, and she could offer some interesting insights during the examination. Neville Longbottom could also be present. He's been through a lot in the wizarding world, and his presence could add another layer to the story. Additionally, some fanfictions might include characters from Snape's past, like Lily Potter. Her presence, either in flashbacks or in some magical form, could greatly affect the dynamic between Snape and Harry during the examination.
Harry Potter is often a common character. His relationship with Snape was complex in the original series, and in fanfiction where Snape is a father, it can add another layer of complexity. Harry might be involved in some way, either as an ally or an antagonist to Snape's new - found family situation.
Dumbledore could be involved. He often has his fingers in many pies at Hogwarts, so he might be the one who arranges for Snape to deliver the letter to Harry for some greater good or part of his grand plan. Another possible character could be Hermione. She might notice something strange about Snape delivering the letter and start to investigate, suspecting that there's more to it than meets the eye.
Dumbledore can also be a significant character. He might be the one who arranges for Snape to teach Harry, having some grand plan in mind. He could be observing from the sidelines, guiding Snape's actions and Harry's progress subtly.
Well, one possible plotline could be that Snape is examining Harry for some sort of magical ability or deficiency that he suspects. Maybe he's trying to figure out why Harry has such an affinity for certain spells. Another could be that Snape is examining Harry as part of a school investigation, perhaps related to some mischief that's been going on. And it could also be that Snape is secretly examining Harry to protect him from some hidden danger in the wizarding world.
There could be other Death Eaters that Snape knew in his life. In the afterlife, they might be there to either confront him about his double - agent status or to seek redemption themselves. And sometimes, characters from Snape's childhood, like his parents or childhood friends, might appear to add more depth to his backstory and his experiences in the afterlife.
Hermione would likely be there. She's Harry's best friend and is always ready to support him. So, when Harry talks back to Snape, she might be there in the background, giving Harry encouraging looks or even stepping in to add her own two cents if things get really out of hand. Ron could also be present. He's not one to shy away from a confrontation, especially when it involves his friends. He might be the one to start a bit of a ruckus among the other students as Harry and Snape have their exchange.
In the fanfiction, Snape's impression might make him more protective of Harry. He could start to subtly look out for Harry's well - being, whether it's in the face of other students' bullying or more dangerous threats from the dark side. This would be a significant change from their usually strained relationship in the original story.
Another reason might be that Harry is suspected of sneaking around in areas where he's not supposed to be. Snape, as a vigilant teacher, may punish Harry to maintain discipline in the school. He may think Harry is up to something related to the ongoing dangerous situations in the wizarding world and wants to keep him in line.
One challenge could be Harry's distrust. Harry has had a long - standing enmity with Snape, so he might be reluctant to accept Snape's help. Another is the complex nature of Harry's problems. Harry has faced so many traumas and has a big destiny to fulfill. Snape might find it difficult to address all these issues without overstepping boundaries or causing more harm.
I don't think it's common at all. Harry was constantly in the thick of things, dealing with Voldemort and the Death Eaters. His mind was occupied with survival, protecting his friends, and learning magic for real - life situations. Buying Snape fanfiction seems like a very modern, Muggle - like activity that doesn't really fit into his world.