Well, a frequent theme is the exploration of how their friendship breaks down. It could start with a single event that causes Ron to turn against Hermione. Also, there might be themes related to unrequited love from other characters. For instance, if another character has feelings for Hermione and Ron's hatred is somehow related to that. And sometimes, the theme of betrayal might be there. Maybe Hermione does something that Ron perceives as a huge betrayal, and that's the start of his hatred in the fanfiction.
Common themes in such fanfiction often involve power struggles. Since Hermione is known for her intelligence and Ron can be a bit insecure at times, the fanfiction might play on that. There could be a theme where Hermione's success makes Ron feel inferior, leading to his hatred. Another theme could be the clash of values. If the writer wants to take the characters in a different direction, they might make Ron and Hermione have very different values in the fanfiction, which causes Ron to hate her. Additionally, there could be themes of social isolation, where Ron's hatred of Hermione causes him to be isolated from their group of friends or vice versa.
In some fanfictions, Ron might be under the influence of a spell or some dark magic that changes his behavior. If he starts acting in a way that is harmful or annoying to Hermione, like constantly arguing with her or trying to undermine her work, she could end up hating him. Also, if there's a competition in the fanfic, say for a powerful magical item or a high - ranking position in the wizarding world, and Ron tries to cheat Hermione out of it, that would likely make her hate him.
One common plotline could be Hermione forming a closer friendship with Fleur. Since she hates Ron, she might turn to Fleur for support and they could end up having adventures together, perhaps in the wizarding world outside of Hogwarts.
One common theme is their relationship development. It often starts from their bickering in Hogwarts and evolves into a deep love. Another theme is how they support each other. For example, Hermione helps Ron with his studies, and Ron gives Hermione the emotional support she needs.
One common theme is academic rivalry. Hermione is very studious and Snape is a strict teacher, so there could be a sense of her constantly challenging him in the classroom. Another theme might be her association with Harry and Ron, who Snape has his own issues with. So her friendship with them can be a reason for his dislike in these fanfictions.
One common theme is the class and house divide. Hermione, a Gryffindor, represents the values of courage and loyalty, while Draco, a Slytherin, is often associated with cunning and ambition. This clash of values can fuel Hermione's hatred.
One reason could be a divergence from the original character traits. In the original story, Hermione and Ron have a complex relationship with love and friendship. Fanfiction that misrepresents Hermione's feelings towards Ron might go against the essence of her character. Maybe the fanfiction portrays her as hating Ron in a way that doesn't fit with her growth and development in the official series.
One common theme is insecurity. In many of these fanfictions, either Ron or Hermione feels insecure about their relationship, which leads to jealousy. For example, if Hermione is excelling academically and getting a lot of attention for it, Ron might feel left behind and insecure, thus becoming jealous.
In 'Ron and Hermione short fanfiction', a common theme is growth. Both characters grow individually and in their relationship. Ron might grow in confidence, and Hermione in her ability to be more open - minded. Another theme is the family aspect. How they fit into each other's families or how they might start their own family in the future. Also, the theme of adventure. They often go on little adventures together in these fanfictions, whether it's exploring a hidden part of Hogwarts or dealing with a magical creature.
One common theme is jealousy. Ron might be jealous of Hermione's closeness with Harry or her academic success, and this jealousy could lead to him saying or doing things that hurt her. Another theme could be insecurities. Ron's own insecurities might cause him to lash out at Hermione.
One common theme is relationship troubles. For example, they might have trust issues where Ron doubts Hermione's loyalty or vice versa, leading to a nightmare - like state in their relationship. Another theme could be the fear of losing each other, either through death or some other means like being separated forever.