She could be seeking revenge against those who wronged her father. So she goes to Azkaban, using her father's old contacts and knowledge, to find the real culprits. She might be a powerful witch, with skills in Occlumency to protect her mind from the dark influences in Azkaban.
In this fanfiction, Sirius Black's daughter might be led to Azkaban by a prophecy. The prophecy could be related to some ancient magic hidden within the prison walls. She teams up with some unlikely allies, like a reformed Death Eater who has knowledge of Azkaban's secrets, and together they try to solve the mystery.
Sirius Black's daughter may have grown up with a sense of justice instilled in her. When she hears rumors about Azkaban being more than just a prison, she decides to investigate. She uses her charm and intelligence to gain access to the prison. Once inside, she discovers that her father's imprisonment was part of a much larger plot, and she has to race against time to expose the truth and free those who have been wrongly accused.
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.
There probably is. The Harry Potter fandom is huge and full of diverse ideas. Writers might explore this idea to add new twists to the story, like how Harry's relationship with Sirius would be re - imagined if he were his daughter, and how it would change the overall plot dynamics.
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 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.
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 interesting fanfiction could be about Sirius Black's daughter joining Harry Potter and his friends on their adventures at Hogwarts. She might inherit her father's brave and rebellious spirit, causing some interesting twists in the story.
In some fanfictions, the mother could be a character that was only briefly mentioned in the original series. For example, it could be a witch he knew from his school days at Hogwarts. They reconnected later in life and had a daughter. Or, it could be a new character who has a special connection to the Black family, perhaps a distant relative who got closer to Sirius and they had a child together.
One possible fanfiction could be about Sirius Black's daughter discovering her father's true nature and his relationship with Harry Potter. She might start at Hogwarts and face some challenges due to her father's reputation. For example, some students might be wary of her at first, but she gradually proves herself to be a brave and kind witch, just like her father.
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.