One could also write a fanfiction about Sirius Black's impact on Hogwarts during the events of Prisoner of Azkaban. For instance, his presence, even though he's on the run, could have a big influence on the students. Some students might start to question the Ministry of Magic's actions, and Sirius could inspire them to fight for justice.
In many fanfictions about Sirius Black in Prisoner of Azkaban, he is often given a chance for a new adventure. Writers might imagine him escaping Azkaban in more elaborate ways, or having different interactions with Harry Potter and his friends. For example, some fanfictions have him forming a secret alliance with other prisoners to break out together.
Yes, it's possible. Sirius is a popular character in the Harry Potter series, and many fans like to imagine him in different scenarios in fanfiction. He has a complex personality and a lot of untold stories, so fanfiction about him in the context of 'Prisoner of Azkaban' can be very interesting.
One idea could be that Sirius Black's daughter, who has been hidden away all this time, discovers her true identity while trying to break into Azkaban to clear her father's name. She could have some unique magical abilities that help her in this dangerous quest.
One common plot idea is exploring Sirius Black's life more in - depth. Maybe a fanfiction could focus on his time in Azkaban before his escape, showing his mental state and how he coped. Another idea is changing the roles. For instance, what if Hermione was the one who was wrongly accused instead of Sirius? It would create a whole new dynamic.
Sirius might be a bit angry if the fanfiction misrepresented him. He was a proud Gryffindor and a loyal friend. If the stories made him out to be something he wasn't, like a coward or a traitor in a different way than what was in the real story, he'd be offended. But on the other hand, if the fanfiction showed his true essence and added more depth to his relationships, he might be quite impressed.
Remus Lupin is often present. He was one of Sirius' old friends and a fellow Marauder. Their friendship can be delved into deeper, especially considering the complex history between them. Dumbledore is another common character. He plays an important role in the wizarding world and his interactions with Sirius can add depth to the story.
One great fanfiction could be 'Sirius's Redemption'. In this fic, Sirius, after escaping from Azkaban, tries to reintegrate into the wizarding world while dealing with his past traumas. It delves deep into his relationships with Harry and his old friends. The author does an amazing job of portraying Sirius's struggle with his sanity after years in that dark prison. Another interesting one is 'Sirius: A New Beginning'. It focuses on Sirius starting a new life outside of the shadow of Azkaban, exploring new magic and forming new alliances. It's a really engaging read if you like seeing the character grow in different directions.
One idea could be Hermione discovering a hidden spell in the Prisoner of Azkaban events that helps her protect Harry in a more unique way. For example, a spell that can temporarily freeze time around a small area, allowing them to escape from danger more easily.
You can try some popular fanfiction websites like Fanfiction.net or Archive of Our Own (AO3). On Fanfiction.net, you can use the search bar and type in 'Prisoner of Azkaban' to get a list of relevant fanfictions. AO3 also has a great collection and advanced search options to help you narrow down to the exact type of fanfiction you're looking for based on tags such as characters, relationships, and genres.
A good Sirius Black post - Azkaban fanfiction should first of all capture his character accurately. He has been through a great deal in Azkaban, so his mental state should be reflected realistically. For example, his paranoia and his moments of confusion. Also, the relationship with other characters like Harry, Hermione and Ron is crucial. If it's a story where he tries to be a part of Harry's life again, it should show the complexity of that relationship. Good use of the wizarding world's lore is also important. Maybe he discovers some old magic related to his family while trying to start anew. And, of course, an engaging plot that keeps the readers hooked from start to finish.