Their relationship might start off rocky. Albus Severus Potter has grown up hearing different things about Snape, and Snape is not used to dealing with the son of Harry Potter. But as they spend time together, they could find common ground. For example, they both have a connection to the Potter family in different ways. Albus might start to admire Snape's intelligence and skill in potions, and Snape could see potential in Albus.
One possible plotline could be that Albus Severus Potter is initially shocked and a bit scared to meet the living Snape. Snape, on the other hand, might be initially cold towards Albus, but as they interact more, Snape could see a bit of Harry in Albus and start to warm up. They could end up having long discussions about the past, Snape's relationship with Harry, and how Albus can learn from the past mistakes. Maybe Snape could even teach Albus some advanced potions skills that are not taught in the regular Hogwarts curriculum.
To evaluate Snape's characterization, look at how his loyalty is portrayed. In the original series, he was loyal to Dumbledore but also had a complex past with Voldemort. His relationship with students, especially those in Slytherin, should also be considered. If he's too soft or too harsh compared to the books, it might be a sign of poor characterization.
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.
This could be a modern AU (Alternate Universe) fanfiction where the magical setting is replaced with a contemporary one and Snape takes on a non-magical job like being a bartender.
In fanfiction, Snape's use of Occlumency often adds a layer of mystery. Writers might explore how he mastered it, perhaps delving into his training under Voldemort. It could be that in some fics, his Occlumency skills are what keep him alive while spying. Occlumency also ties into his complex relationship with Harry. For example, when he was teaching Harry, it was a tense and difficult process, and fanfiction can expand on this dynamic, showing different perspectives of Snape's Occlumency teachings and how they affected Harry.
Snape and Lucius can be presented in various ways in fanfiction. One common portrayal is that Lucius, being from a wealthy and influential pure - blood family, may look down on Snape at first due to Snape's half - blood status. But as they grow older, they find common ground in their service to Voldemort (although Snape has his own hidden motives). Their relationship might be full of intrigue and hidden agendas.
Quietus Snape fanfiction often delves into the complex character of Severus Snape. Some stories might focus on his unrequited love for Lily. They can be quite interesting as they explore the darker aspects of his personality that were not fully shown in the original books.
Reacting to Snape fanfiction depends on your own view of Snape. If you're a big Snape fan, you'll likely be excited to see different scenarios and stories about him. You could get really into the fanfiction that portrays him as a complex and misunderstood hero. However, if you have a more neutral or negative view of him, you might approach the fanfiction with more caution. Maybe you'll be more interested in ones that try to humanize him even if you don't fully like him.
In some ways, it's not acceptable. Snape is a complex character. While in the original series he had his own issues and was often mean, in fanfiction, if it's just pure bullying for no good reason, it goes against the essence of character development. Fanfiction should aim to expand on the characters in a meaningful way, not just have senseless bullying.