One interesting fanfiction could be where Harry and Sirius Black's daughter team up to solve a mystery at Hogwarts that the adults are overlooking. They might discover a hidden chamber or a secret about a forgotten spell.
One interesting fanfiction could be about Sirius Black secretly training Harry Potter in advanced magic during his time at Hogwarts. This would add a whole new dimension to their relationship and Harry's growth as a wizard.
One great Sirius Black x Harry Potter fanfiction is 'The Marauder's Plan'. It delves into Sirius's relationship with Harry in a really interesting way, exploring how Sirius could have been more involved in Harry's life at Hogwarts. Another one is 'Sirius's Redemption'. It shows Sirius's journey of protecting Harry and making up for the lost time. And 'Bond Beyond Blood' is also good. It focuses on the unique bond that forms between them, different from just a normal godfather - godson relationship.
A common plotline is them teaming up to solve the mystery of Sirius Black's past. His daughter wants to know more about her father and Harry, having known Sirius, is also interested. They end up on an adventure filled with magic and danger.
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.
One common theme is family. Sirius is Harry's godfather, so many fanfictions explore the idea of family that goes beyond blood. Another theme is redemption. Sirius has a past full of mistakes and he often tries to redeem himself through his relationship with Harry. Also, protection is a big theme. Sirius is always trying to protect Harry from the threats in the wizarding world.
One interesting aspect is the changed family dynamic. Instead of being an orphan with the Dursleys, Harry would have a different kind of upbringing with Sirius as her father. This could mean she has a stronger connection to the wizarding world from the start. Another aspect is how it would affect her relationships at Hogwarts. Her friends might view her differently, and her enemies too. Also, Sirius's knowledge and skills could be passed on to her in a more direct way, like advanced magic training or knowledge of the wizarding underworld.
One interesting plotline could be a mystery - solving one. Harry discovers some strange artifacts in Grimmauld Place that were left by Regulus. With Sirius (if he's alive in the fic), they try to figure out what these artifacts mean and it leads them to uncover a long - forgotten plot by Voldemort. Another plotline could be a redemption arc for Regulus. Harry, after learning about Regulus's attempts to undermine Voldemort, tries to clear his name in the wizarding world, which causes some friction with those who still see the Black family as mostly dark wizards. And there could be a plotline about family secrets. Sirius and Harry find out that there are hidden magical abilities in the Black family bloodline that only Regulus knew about, and they have to figure out how to use or control them.
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 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.
Perhaps Sirius Black's daughter has a special connection to Harry through a long - forgotten prophecy. They start to notice strange coincidences and shared dreams. As they investigate, they find out that their destinies are intertwined in a way that could change the wizarding world. It could involve a journey to find a lost magical artifact that holds the key to fulfilling the prophecy.