Some writers might create 'Remus Hurts Harry' fanfiction to explore the darker side of the characters. It allows them to show that even beloved characters like Remus can have flaws and make mistakes that have serious consequences.
There could be a fanfic where Remus is being controlled by a dark wizard and is forced to harm Harry. This would add an element of mystery and a plot to rescue Remus from the control while also dealing with the harm he has caused to Harry. Another type might involve a rift in their relationship, like if Remus believes Harry has done something wrong and in his anger, he hurts Harry, perhaps with words that cut deeper than physical harm.
You could also follow some fanfiction writers who are known for writing about the Harry Potter universe. Check their works as they might have written something related to Sirius hurting Remus.
There's also 'Sirius' Mistake' which shows a scenario where Sirius' recklessness causes emotional harm to Remus. The fanfiction beautifully portrays Remus' struggle to forgive and Sirius' journey to make amends.
They could start by sharing their deepest secrets. Harry could tell Remus about his nightmares and fears about Voldemort, and Remus could open up about his struggles with being a werewolf. This sharing would create a strong bond between them.
Sometimes, Sirius's own secrets can harm Harry. In some fanfictions, if Sirius hides important information about Harry's family or his own past, and Harry discovers it later in a bad way, it causes emotional pain. A good example is 'The Hidden Truths' where Harry finds out Sirius knew something crucial all along.
Sure. Fanfiction writers love to play with established characters and relationships. In a story where Harry is Remus and Sirius' son, we could see new magical abilities or inheritances coming into play. Maybe he would inherit some of Remus' werewolf - related magic in a different way or Sirius' skills in magic related to his family's heritage. It would also change the emotional dynamics, with a different kind of family support system for Harry.
In fanfiction, it could be that the writer wanted to create a new and different dynamic. Harry could hate Remus if there was a love triangle situation involving someone Harry cared about and Remus. For example, if Remus started dating Harry's mother figure in the fanfic world, it could lead to Harry hating him.
One alternative is fanfiction that explores their family - like bond. Given that Remus was a sort of father figure to Harry in some ways. Stories can be written about how they support each other during difficult times in the wizarding world, like during a new dark wizard threat or a crisis at Hogwarts. These types of fanfiction are much more in line with the spirit of the original Harry Potter series.
One common theme is mentorship. Remus often takes on a mentor role for Harry, guiding him through the challenges of Hogwarts and the wizarding world. Another theme is friendship. Despite their age difference, they form a strong bond based on mutual understanding and respect.