Friendship is a big one. Their bond grows stronger during the third year as they face more complex challenges together. Another theme is mystery. There are often new magical elements or secrets that they have to uncover. For example, a hidden chamber or a forgotten spell.
In many of these fanfictions, the theme of discovery plays a major role. It could be the discovery of a new magical power within themselves or a discovery about Hogwarts' past that has implications for their present. Also, the theme of teamwork is quite common as they work together to overcome the challenges that come their way in their third year.
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 notable one is 'The Hidden Feelings'. It focuses on the subtle changes in their relationship during the 3rd to 7th years. The author does a great job of portraying their unspoken emotions and how they gradually come to realize their feelings for each other.
A common plot could be their exploration of the Hogwarts grounds using the Marauder's Map. They might stumble upon some hidden passages or secrets that are related to the events of that year. Another one is dealing with the threat of Sirius Black. Hermione could be researching ways to protect Harry while Harry is more impulsive and wants to face the danger head - on. Also, there could be a sub - plot about their academic progress, like Hermione acing all her exams and trying to help Harry pass his, especially in subjects like Potions.
One common theme is the struggle with Harry's werewolf nature. It often involves how Hermione helps him deal with it, like finding a cure or just learning to live with it. Another theme is the relationship development between them, which can be full of angst and passion.
Another common theme is the discovery of magic. Since it's their first year, fanfiction often delves into how they experience new magical things together. They might explore parts of Hogwarts that are new to them and share their excitement about magic. For example, they could be in the library finding out about some rare magical spells. The theme of mystery also pops up a lot. There are often small mysteries in the castle that they try to solve as first - year students.
Well, self - discovery is a big theme. Harry is trying to figure out his place in the prophecy and Hermione is constantly learning more about herself and her capabilities. The theme of loyalty also pops up often, as they remain loyal to each other and to their friends in the face of danger. And the theme of facing the unknown, which is very much related to the increasing danger from Voldemort and his followers.
One interesting 'Harry and Hermione 3rd year fanfiction' story could be about their adventures in dealing with the time - turner mystery in a different way. Maybe they discover a new spell related to time while trying to solve the mystery of Sirius Black.
One common theme is the deepening of their relationship. When Hermione is sick, Harry's concern and care for her show a side of their bond that might not be as evident in the original books. It's about how they support each other in tough times.
Well, I've also read 'Harry and Hermione: Third - Year Escapades'. In this one, they embark on an unexpected journey outside of Hogwarts due to a prophecy they discover. Their third - year knowledge and skills are put to the test as they encounter various magical creatures and obstacles along the way.
One common theme is the discovery of new feelings. Since they are in their first year, both Harry and Hermione are new to the whole concept of having romantic feelings, especially towards each other. Another theme is friendship as a foundation. In most of these fanfictions, their existing friendship is what gradually evolves into romance.