One common theme could be the exploration of a complex relationship between Percy and Nemesis. Given Nemesis' nature as the goddess of revenge, there might be themes of conflict and resolution in the relationship.
Often, there could be themes related to power dynamics. Percy has his own powers, and Nemesis has her influence. How these interact and play out in a romantic or sexual context (in the case of lemon fanfiction) can be a theme. For example, who has more control in the relationship, and how does that change over time.
Common themes in 'nemesis x oc fanfiction' include transformation. The nemesis may transform from being purely evil to having some good in them. There's also the theme of mutual growth. Both characters grow and develop as a result of their relationship. And the theme of acceptance is quite prominent. The oc accepts the nemesis for who they are, and this acceptance can have a profound impact on the story's direction.
One common theme is the power struggle. The yandere often tries to exert power over the nemesis, while the nemesis fights back to maintain their independence. For example, in many fictions, the yandere might use psychological manipulation to gain an upper hand.
A common theme is relationship building. Since they are two distinct characters, many fanfics explore how they get to know each other, overcome differences, and develop a bond. Another theme could be adventure. Given the nature of the source material (assuming it has an adventurous aspect), they might go on quests or face challenges together in fanfiction.
Rather than focusing on the themes in inappropriate 'lemon' fanfiction, in regular Percy and Hermione fanfiction, a possible theme is their different roles in the wizarding world. Percy is more into the administrative side of things with his Ministry of Magic work, while Hermione is more into academic research and activism. A story could revolve around how they bridge the gap between their two worlds. For example, Percy might use Hermione's research to propose a new magical law at the Ministry, and this could be a basis for their relationship development in the fanfiction.
A common theme is the exploration of their unique relationship. Writers often focus on how Percy and Hemera complement each other.
Not having read any of the 'Percy Rough Lemon' fanfiction, we can only make assumptions. If Percy is a heroic character, common themes might include heroism, friendship, and the struggle against evil. If there's a 'lemon' aspect, which might imply some sort of romantic or sensual undertones, then love and attraction could also be themes. But again, this is all speculation without actually reading the works.
One common theme could be the exploration of their relationship. Since they are from different backgrounds in the Percy - related universe, their interactions can be a rich source for fanfiction. Another theme might be adventure, as Percy is often associated with quests and challenges, and Kymopoleia could be incorporated into those scenarios in interesting ways in the fanfiction.
One of the common themes is the exploration of their characters' emotions. Since they are complex characters, fanfictions often dig into how Percy and Annabeth feel about each other, like their insecurities and their strong feelings of love. Another theme is the role of friendship in their relationship. Their friendship has always been an important part of their story, and in fanfictions, it's often explored how it transitions into a romantic relationship. Also, facing challenges together is a common theme, whether it's external threats or internal misunderstandings.
In Percy and Chaos Lemon fanfiction, themes of loyalty and betrayal often surface. Since their relationship is complex, there could be situations where one character's loyalty is tested. Additionally, the theme of the unknown and the exploration of uncharted territories, whether it's in a physical or emotional sense, is common. The allure of Chaos and Percy's journey into that unknown can create exciting storylines. And of course, themes related to love and friendship, albeit in a unique context considering their characters, are also frequently explored.
Since 'lemon' implies adult - themed content, one common theme might be a romantic or sexual relationship between Percy and Natasha. However, this goes against the original nature of many of the source materials they come from. Another could be the exploration of their characters in a more intimate setting, but again, this is not in line with the typical portrayal of these characters in official works.