One interesting 'Harry and Sirius fanfic' could be about Sirius teaching Harry some advanced magic that Dumbledore didn't want Harry to learn yet. It would add a layer of secrecy and rebellion to their relationship.
Well, 'The Sirius - Harry Alliance' is quite interesting. It takes a different turn from the canon by having Harry and Sirius form a secret alliance within Hogwarts to fight against a new, emerging dark force. The story is full of action and emotional moments between the two characters.
There are several cool Sirius - centric fanfic concepts. For example, a fanfic could be centered around Sirius's time at Hogwarts as a student. It could show his friendship with James Potter, Remus Lupin, and Peter Pettigrew in more depth, including all the mischief they got into. Or it could focus on Sirius's relationship with his Animagus form. How did he feel about being a dog? What were the advantages and disadvantages? Also, a concept could be Sirius trying to clear his name while still in Azkaban, using his magical abilities in ways that no one thought possible from a prisoner.
One interesting storyline could be Sirius Black surviving the Battle of the Department of Mysteries and then helping Harry train secretly for the final battle against Voldemort. He could teach Harry some advanced magic that he learned from his time in Azkaban and the Order of the Phoenix.
In a 'sirius cuddles harry fanfic', it can be interesting because it often delves into the emotional depth of both characters. Sirius has his own troubled past, and Harry has his traumas. When they cuddle, it can be a moment of mutual comfort and healing, which makes for an engaging read.
One popular 'sirius teases harry fanfic' might be 'Pranks and Protections'. In this fic, Sirius uses his mischievous nature to tease Harry in a light - hearted way. For example, he might transform into different animals to startle Harry and then laugh it off. Another could be 'Family Bonds', where Sirius teases Harry about his crush at Hogwarts while also giving him valuable advice on how to handle relationships.
One popular one could be 'The Bond Beyond Blood'. It delves into the deep emotional connection between Sirius and Harry, exploring how Sirius becomes more than just a godfather to Harry. Another might be 'Sirius's Secret Guidance' which shows Sirius guiding Harry through his struggles at Hogwarts in a very unique and heartwarming way. And there's also 'The Unspoken Bond' which focuses on their unspoken understanding of each other.
One great 'dark sirius harry fanfic' is 'The Darker Path'. It explores a more complex and dangerous wizarding world where Sirius and Harry face challenges that are far from the normal Hogwarts curriculum. The story has a unique take on their relationship, with Sirius being more of a shadowy mentor in a world full of dark magic threats.
There is a great 'sirius raises harry fanfic' called 'Harry's New Home with Sirius'. It shows how Sirius creates a warm and loving environment for Harry. Sirius teaches Harry all about his parents and their friends, the Marauders. It's really heart - warming to see their relationship develop. Also, 'Sirius and Harry: A Bond Forged' is a good one. It delves deep into the emotional bond between them as Sirius steps into the role of a father figure for Harry.
One interesting plot point could be how Harry's relationship with the wizarding world changes. Since Sirius adopts him by blood, Harry might have a different standing in the magical community. He could potentially have more access to Sirius's family secrets and inheritances, which would add new elements to his journey at Hogwarts.
One possible story could be that Harry discovers a new magical ability while riding Sirius in his animagus form. This ability allows them to communicate telepathically and they go on an adventure to find a hidden magical artifact.