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 possibility is that the fanfic delves into Hermione's over - studying for their third - year classes and how Harry tries to get her to relax a bit. They might have an adventure in Hogsmeade that goes wrong when they encounter some dark magic remnants from Sirius Black's escape. Harry could use his skills on the Quidditch pitch to boost his confidence, and Hermione would be there cheering him on while also secretly worrying about the lurking danger around them.
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.
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.
Another great author could be 'HermioneLover456'. They are known for writing detailed descriptions of the Hogwarts environment during Harry and Hermione's 3rd year. Their fanfictions often include little - known facts about the school that add to the authenticity of the story. They might describe how the changing seasons at Hogwarts affect Harry and Hermione's adventures and relationship.
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.
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.
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 wizard from a far - off land who comes to Hogwarts as an exchange student. He could have a whole new set of magical abilities that are different from what the Hogwarts students are used to, like being able to control the weather in a very specific way. This would add an interesting dynamic to the story as Harry and his friends learn from him.
One idea could be to focus on Harry's relationship with Sirius Black in a more in - depth way. Maybe Harry discovers some hidden secrets about Sirius that even Sirius himself doesn't know yet. Another could be to create a new magical creature that is somehow related to the events of the third year, like a creature that is connected to the time - turner.