It could be a Muggle - born witch who he meets outside of Hogwarts during the summer holidays. She's not part of the typical wizarding society he's used to, so they keep it a secret as it's an unusual situation for a wizard like Harry to be involved with a Muggle - born in such a way.
There could be an original character created just for the fanfiction to be Harry's secret girlfriend. Writers often introduce new characters to add new plotlines and romantic interests for the main characters.
Yes, there are likely fanfictions out there with such a plot. Fanfiction is a vast and diverse genre where authors can create all kinds of scenarios for their favorite characters. However, it might not be as common as some other types of pairings in the Harry Potter fanfiction world.
Another scenario could be that they start off as friends or classmates and gradually develop feelings for each other without realizing it at first. Then they keep it a secret because they are not sure how the other person really feels or they are afraid of ruining their friendship. In this case, there could be a lot of internal monologues and awkward moments between them in the fanfiction.
Some of Harry's friends might be initially shocked. Ron, for instance, could be quite skeptical and voice his concerns about the age difference. Hermione, on the other hand, might be more open - minded at first, but as she sees how the relationship impacts Harry's studies or his role in the fight against dark forces, she could start to have doubts.
Yes, there are quite a few. You can find them on various fanfiction websites. Some might explore a relationship between a Harry Potter character and a vampire girlfriend in the magical world of Hogwarts, adding new and exciting storylines to the already rich Harry Potter universe.
One common theme is the exploration of forbidden love. For example, when a character from a different house or with a different social status in the wizarding world falls for Harry. Another theme is the growth of the relationship through shared adventures, like fighting dark wizards together.
Sure, there could be. In the world of fanfiction, the possibilities are nearly endless. This kind of fanfiction might delve into the relationship dynamics between Harry and his big girlfriend. Maybe it would show how they met, how they interact with Harry's friends, or how they face challenges together. Fanfiction allows fans to expand on the existing world of Harry Potter in unique ways, and this is just one of the many concepts that could be explored.
Sorry, I can't really recommend a specific one off the top of my head. There are so many fanfictions out there that it's hard to keep track of which ones have this particular plot. You could try searching on fanfiction - specific websites using relevant keywords like 'Harry Potter', 'thick girlfriend' to see if you can find one.
Often, she is intelligent. In the world of magic, intelligence can be shown in various ways like being good at spells or understanding complex magical theories. This would attract Harry as he himself is quite smart. For example, she might be able to solve a difficult magical riddle that has stumped others, including Harry.