The mystery surrounding Voldemort's return is also a common theme. Fanfictions often explore how the students and teachers at Hogwarts start to suspect and then deal with the news. Additionally, the theme of identity is prevalent. Harry is constantly trying to figure out his place in the wizarding world, especially with all the new attention from the tournament and the rumors about him and Voldemort.
In fanfiction about their 7th year, the theme of sacrifice often appears. They might be willing to sacrifice themselves for each other or for the greater good. The exploration of Hogwarts' secrets is also a theme. They could be delving into the deepest parts of the school, finding things that have been long forgotten, which could be a key to victory in the war against Voldemort. This exploration also deepens their bond as they share these new experiences together.
Another interesting plot could be that Harry's connection to Voldemort causes some strange magical disruptions during the Triwizard Tournament. These disruptions seem like accidents at first, but Harry gradually realizes they are being caused by his own dark - side related powers that are being awakened in his fourth year.
One common theme is the struggle with identity. Harry already has a lot on his plate as 'The Boy Who Lived' and now with being mpreg, he has to reevaluate who he is. Another theme is the support system. It often shows how his friends and allies in the wizarding world either step up or falter in their support for him.
Romance is also a common theme. Harry's growing feelings for Cho Chang, and other potential romantic relationships among the characters are often explored in fourth year fanfiction. It adds an extra layer of complexity to the story as the characters are also dealing with the high - stakes events of the Triwizard Tournament.
The themes usually include the exploration of love. As they grow from the 3rd to 7th year, their feelings might start to change. Another theme is the fight against the dark forces, which brings them closer. And there's also the theme of family, as they become like family to each other, especially with Harry not having a proper family, and Hermione's family being so different from the wizarding world.
A theme that often comes up is self - discovery. Both Harry and Hermione are on the verge of adulthood in their 7th year. Fanfics might show how they discover more about themselves, their powers, and their place in the wizarding world. Also, loyalty is a big one. Their loyalty to each other and to their friends is often emphasized.
Competition is another theme. Given that Krum is a Quidditch star, there could be a lot of competition - related elements. It could be about competing in Quidditch matches, but also in other areas like academic competitions or contests of magical skills.
Make sure the character's actions are consistent with their personality. If they are shy, they won't suddenly be the center of attention in the Great Hall without a good reason. Their growth throughout the fanfiction should also be gradual. In the fourth year at Hogwarts, there are a lot of new challenges like the Triwizard Tournament. So, the character should respond to these challenges in a way that is in line with who they are.
Love against all odds is also prevalent. Given their past as enemies, it's a big deal for them to fall in love during their 7th year. It shows that love can transcend differences. And then there's the theme of self - discovery. Both characters learn more about themselves as they interact with each other during this crucial year.
One common theme is the exploration of relationships. For example, romantic relationships between characters that were not fully explored in the original books, like the relationship between Harry and Hermione. Another theme is the expansion of the magical world, such as new spells or magical creatures. Also, there are fanfictions that focus on the backstories of minor characters, giving them more depth and significance.