One reason could be Harry's impulsiveness. Harry often jumps into dangerous situations without thinking, and Sirius, being his godfather and having a protective nature, would shout at him to make him realize the risks. For instance, if Harry decides to go after a Death Eater alone.
Sirius could use his knowledge of the wizarding world's secrets. He might know some hidden places or spells that could keep Voldemort at bay. For example, he could put a powerful protective charm on the place where Harry is staying.
In some fanfiction, Harry might be written to hate Sirius due to misunderstandings. For example, if a writer wants to create drama, they could make Sirius do something that Harry misinterprets. Maybe Sirius makes a decision about Harry's future without consulting him first, leading Harry to feel angry and resentful.
One great 'Dark Harry and Sirius' fanfiction is 'The Unseen Bond'. It explores a darker side of Harry's magic while maintaining a strong connection with Sirius. The story is full of twists and turns that keep you on the edge of your seat.
Yes, there are likely some fanfictions with this concept. Fanfiction writers often come up with creative and alternative family relationships for characters. You can search on popular fanfiction websites like Archive of Our Own or Fanfiction.net using relevant keywords to find such stories.
Typically, these fanfictions focus on a strong bond between Harry and Sirius. It often shows a deep emotional connection, like in 'A Bond of Trust' where Harry confides in Sirius about his fears regarding Voldemort.
There is a fanfiction titled 'Under Sirius' Watch'. In it, Sirius catches Harry and Draco sneaking around the castle at night. This leads to a series of events where Sirius has to decide whether to report them or try to understand what's really going on between the two. The story delves deep into the characters' emotions and the complex relationships within the Hogwarts world.
Perhaps in the fanfiction, Sirius is mad at Harry because Harry has befriended someone Sirius doesn't trust. Sirius, being protective of Harry, might see this new friendship as a threat. He could be worried that this person will lead Harry astray or put him in danger, and his anger towards Harry stems from his concern for Harry's well - being.
Yes, there are quite a few. You can start by looking on fanfiction.net or Archive of Our Own. Some might focus on their deep emotional connection that could be seen as a soulmate - like bond, exploring how they support and understand each other in the difficult wizarding world.