Ron shows his brotherly love for Harry in many ways. For example, he always stands by Harry in dangerous situations. In the face of Voldemort's threats, Ron doesn't abandon Harry but rather stays to fight alongside him. He also shares his things with Harry, like the food his mother sends him at Hogwarts. And Ron often tries to cheer Harry up when he's feeling down, like when Harry is troubled about his connection to Voldemort.
Family is a big theme. Since Harry is now part of the Weasley family as Ron's little brother, stories often explore the new family dynamics. Another theme is friendship. His relationship with Hermione and the other Gryffindors changes as he is now a Weasley. Also, identity is a theme. Harry has to figure out who he is in this new role.
Hard to say for sure. It might tell a tale of friendship, or it could be inspired by a real-life experience. Different people might interpret the story differently based on their own feelings and imagination.
Another possibility is that in the fanfic's unique plot, there could be some sort of magical influence or dark magic at play. Perhaps a spell was cast on Ron that made him act out of character and punch Harry. It could also be part of a complex plot where Ron is being controlled by an outside force to create drama between him and Harry in the context of the Drarry relationship.
It could also lead to a divide within their group of friends. Hermione, for instance, might be caught in the middle, not knowing who to side with. This could create a lot of tension and conflict among the characters, adding more drama to the fanfic. If the punch was public, it could also damage Ron's reputation among their peers, as punching a friend is not an acceptable behavior in most cases.
One interesting 'Harry is Ron's little brother' fanfiction is 'The Weasley Bond'. It explores how Harry's relationship with the Weasley family changes with this new dynamic. He gets more involved in the family's day - to - day affairs and there are some really heartwarming moments between him and Ron as brothers.
Luna Lovegood can also be a prominent character. She could have some unique insights about the strange lemon - related happenings. Maybe she's the one who first notices the significance of a lemon - shaped cloud that has some sort of magical connection, and she guides Harry and Ron in understanding it.
Often, their friendship evolves as they learn to understand each other's weaknesses. Ron realizes that Harry has a heavy burden as the Chosen One, and Harry comes to understand Ron's need for recognition. They support each other in these aspects, which helps their friendship to develop. For instance, when Ron is feeling overshadowed by Harry's fame, Harry makes an effort to include Ron in important matters more, and Ron starts to be more confident in his own abilities because of Harry's trust in him.
It could be a misunderstanding. For example, Ron might think Harry did something really bad to Hermione or their other friends. Without proper communication, his anger could lead him to punch Harry. Also, if there was some sort of magical influence or dark magic at play that affected Ron's judgment, that could be a reason too.