One possible plotline could be the daughter's discovery of her true identity. Maybe she was raised in an ordinary Muggle family and suddenly strange things start to happen. She begins to show magical abilities and then discovers she is Sirius Black's daughter. Another plot could involve her search for her father's legacy within the wizarding world, facing both friends and foes along the way.
In such fanfiction, it could add a new dynamic to the story. Maybe she inherits some of Sirius' traits and faces her own adventures in the wizarding world.
Her relationship with the Hogwarts professors could be interesting. Some, like Dumbledore, might have known about her all along but kept it a secret for her protection. So, she could feel a sense of betrayal at first but then understand his reasons. As for Snape, he might be particularly harsh on her because of her Black heritage, but she could prove him wrong with her kindness and courage. Among the students, she could form a clique with those who are outcasts or misfits, and together they could face the challenges of Hogwarts life.
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.
In fanfiction, such a plot might seem very out of character for Sirius Black. In the original series, Sirius is a loving and loyal character. This could be a very dark and angsty take in the fanfic. Maybe the writer wants to explore complex family dynamics or some kind of tragic backstory that led to this situation. However, it goes against the general perception of Sirius as a heroic and loving figure.
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 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.
Well, in the fanfiction world, 'Sirius Black's Daughter: A New Hope' is quite interesting. It shows how the daughter, with her unique abilities, tries to make a name for herself in a post - Voldemort era. It has a great plot that weaves in elements of mystery and adventure. There is also 'Daughter of the Marauder' which is known for its detailed character development of Sirius Black's daughter.
Obviously, the daughter of Sirius Black is the main character. She is often depicted as having some of her father's rebellious spirit. Her friends at Hogwarts also play important roles, like her best friend who might be from a different house, adding an element of inter - house friendship.