In some fanfictions, Sirius' character develops a greater sense of responsibility. When he rescues Harry, he realizes how important it is to be there for him, not just in times of physical danger but also for his emotional growth. So he becomes more of a mentor figure.
Sirius' character development could involve him coming to terms with his own past traumas while rescuing Harry. He may have to face his fear of Azkaban and the dark magic that he has encountered in his life. As he rescues Harry time and time again, he becomes more confident in his own abilities and his place in the fight against Voldemort. He also starts to see Harry as more than just James' son, but as an important part of the wizarding world's future, which makes him more committed to protecting Harry at all costs.
One great example could be a fanfiction where Sirius Black arrives just in time to save Harry from a group of Death Eaters. He uses his Animagus form to surprise the attackers and whisks Harry away to safety. Another might involve Sirius rescuing Harry from a dangerous situation in the Forbidden Forest, using his knowledge of the area and his magical abilities.
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 some fanfiction, yes. Fanfiction writers often like to play with the relationships in the Harry Potter universe. They might create a scenario where Sirius Black is Harry Potter's father, perhaps exploring how this would change the story's dynamics, the relationships between characters, and the overall plot.
Fanfiction about these three can take many forms. For example, there could be time - travel fics where Harry goes back in time and meets Regulus and Sirius when they were younger. This could lead to all sorts of interesting plot twists, like Harry trying to prevent Regulus from joining the Death Eaters in the first place. Or it could be a fic where Sirius survives and he and Harry explore the secrets of the Black family together, including things that Regulus left behind. There are also fics that focus on the emotional bonds between the characters, showing how the different personalities of Regulus, Sirius, and Harry interact and influence each other.
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.
One great fanfiction could be about Sirius Black's brother's hidden life. Maybe he was involved in some secret mission before his untimely death. Writers might explore his relationship with Sirius in more depth, like the times they spent together as children, their shared secrets and how their paths diverged as they grew older.
In some fanfictions, Sirius Black can be depicted as Harry Potter's father. Fanfiction often takes creative liberties with the original story, so it's not uncommon to see such radical changes in character relationships for the sake of exploring new storylines or emotional arcs.
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.