Perhaps Rose is a mysterious child with a prophecy attached to her. The wizarding world is on edge about her existence, but Harry, believing in the good in people, adopts her to protect her from those who would use the prophecy for their own evil ends. He becomes her protector and mentor, guiding her through a world full of secrets and danger.
One characteristic is the focus on their relationship development. In many of these fanfictions, we see how Harry and Rose first meet, how their feelings grow from friendship to love. Another is the use of vivid descriptions. Writers often describe the settings, like a lemon grove perhaps, in great detail to set the mood. Also, the exploration of their individual personalities within the context of the relationship is common.
One common theme is adventure. They often go on quests or travels together. For example, in many fics they might be exploring a mysterious forest or an ancient castle. Another theme is friendship. Their bond is usually at the core of the story, showing how they support each other through thick and thin.
At first, it might be a bit awkward. Rose may not trust Harry easily as he's a stranger to her in a sense. But as time passes, if Harry shows his love and care constantly, like being there for her important events or helping her with her problems, they could start to have a closer bond.
It's hard to say who the 'best' are, but there are some well - known names in the fanfiction community. Some authors who have a large following often create really engaging storylines that stay true to the essence of the Potter universe while adding their own unique twists with Harry and Rose Potter.
One idea could be a story where Rose, who might be a new student at Hogwarts, befriends Dobby. Harry Potter could then play a role as a mentor to Rose, guiding her through the magical world. Dobby could use his unique magic skills to help Rose in various tasks around the school, like finding hidden passages.
In many fanfictions, Rose Weasley is often depicted as highly intelligent, just like her mother Hermione. She has a thirst for knowledge and is excellent at her studies. For example, in some stories, she's the top student in her year. She also usually inherits her family's courage. When faced with danger, she doesn't back down easily.
In a 'harry adopts rose fanfiction', perhaps Rose has some special power or connection that draws Harry to her. Harry might adopt her to keep her safe from those who would misuse her power. He then has to navigate the challenges of being a single parent in the wizarding world, like getting her enrolled in Hogwarts, dealing with other parents who might be suspicious of his motives, and helping Rose control her magic as she grows up.
It might be a story where the rose paradox serves as a central plot device in the context of Voldemort. For example, perhaps the rose has some magical properties that are in conflict with Voldemort's power or ideology. It could be that a character discovers this paradox and uses it to their advantage against Voldemort, or it could lead to unforeseen consequences that drive the story forward.
One popular 'Harry and Rose Potter fanfiction' might be those that explore their relationship as siblings in new and different ways. For example, stories where they face challenges together at Hogwarts that weren't in the original books.