There could also be a more light - hearted plot where Charlie accidentally finds Hermione in a comical situation, like she's lost in a maze of magical bookshelves in the Hogwarts library. And from there, a friendship or a budding romance could develop as they help each other out of the situation and start sharing their interests.
A common plotline could be that Charlie stumbles upon Hermione while she's researching something related to magical creatures in a remote location, perhaps in the Forbidden Forest or on a dragon reserve. They then team up to solve a mystery regarding the magical creature she was researching.
One possible plotline could be that Charlie comes back to Hogwarts for some dragon - related research. He meets Hermione in the library while she's studying, and he starts flirting with her by complimenting her intelligence and her passion for learning. Another plotline might be at a Weasley family gathering where Hermione is invited. Charlie is immediately drawn to her and tries to get her attention by showing off his dragon - taming skills in a humorous way.
Well, a frequent theme is the combination of magic and knowledge. Hermione's vast knowledge of magic and Charlie's practical knowledge of magical creatures often come together. Also, there is the theme of cultural exchange within the wizarding world. Charlie, who has been away in Romania, and Hermione, who is deeply involved in the British wizarding community, share their different experiences and views in many stories.
Fanfiction.net is also a popular site. However, the search functionality might not be as advanced as AO3. But still, it's worth a try. Just type in the keywords 'Charlie Weasley finds Hermione' and see what comes up. Some of the stories might be old but could offer interesting perspectives on the relationship between these two characters.
One common theme is adventure. Given Charlie's experience with dragons and Hermione's penchant for getting into exciting situations, many fanfictions send them on wild adventures. Another is friendship. They might start as acquaintances and develop a deep friendship over time. And of course, there are some that explore a potential romantic relationship between the two.
One possible plotline could be that in a dangerous situation in the wizarding world, like a new dark magic threat emerging. Charlie, with his experience handling dangerous magical creatures, uses his skills to keep Hermione safe. Maybe they are in a place full of dark creatures and Charlie's knowledge of their behaviors helps him fend off attacks aimed at Hermione.
One common plotline is that Charlie gets wind of a plot against Harry before it fully unfolds. He then races back to Hogwarts or wherever Harry is and sets up a protective perimeter around him. This often involves a combination of magical spells and the use of his dragon - taming abilities in a creative way to keep the bad guys at bay.
A prevalent theme is the clash and fusion of different personalities. Hermione is highly intellectual and organized, while Charlie is more of an adventurous, outdoorsy type. When she flirts with him, it's like two different worlds colliding. It can also lead to a theme of acceptance, as they accept each other's differences and grow closer because of it.
One common plotline is the journey of Hermione and Ron (assuming she's married to Ron in the fanfic) as they prepare for the baby. It might involve them decorating the nursery, choosing baby names, and dealing with the excitement and nervousness of impending parenthood.
There are also fanfics where Bill is initially unaware of Hermione's feelings. So, Hermione has to find ways to subtly show her interest. This can lead to some really cute and awkward moments between them, as she tries to get closer to him without being too obvious.
Yes, there are quite a few. You can start by looking on fanfiction.net or Archive of Our Own. Just search for 'Charlie Weasley and Hermione' and you'll find a variety of stories, from adventure - based ones where they go on dragon - related quests together, to more character - study - like fictions that explore their relationship in the wizarding world.