Love and relationship growth is also a theme. Their relationship that started at Hogwarts has had 19 years to develop. Fanfictions might show how they keep the spark alive, or how they support each other through different life stages.
One common theme is family. Since it's 19 years later, they likely have a family of their own, so stories could revolve around family values, sibling relationships among their children, and how they pass on the traditions of the wizarding world to the next generation.
A very frequent theme is the challenges they face in their relationship. Because they have different personalities, there are bound to be frictions. Fanfictions love to explore how they overcome these differences and grow closer. Also, family is a common theme. How they start their own family and raise their children, passing on the values they learned from their own experiences at 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.
Another possibility is that it could focus on their adventures together. They might go on some sort of mission or exploration within the wizarding world. It could be related to a new threat that has emerged, and they have to use their combined skills and knowledge to deal with it.
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.
A common theme is discovery. Since it's set in the library, they often discover new things about magic, knowledge, and also about each other. For example, they might find a long - lost spell book that leads them to a new understanding of a certain type of magic, and at the same time, they learn more about their own feelings towards each other.
Love and relationship growth. Their honeymoon is a time for them to deepen their connection, so a lot of fanfictions focus on how they become even closer and understand each other better.
A common theme is the exploration of their different personalities. Ron is more laid - back and Hermione is more studious, and fanfictions often play with how they balance each other out in a dating relationship.