One main theme is rivalry - turned - friendship. They start off as rivals but often in fanfics, they come to respect and befriend each other. For example, in many stories, they learn to see past their initial differences.
The fanfic could start with Percy and Clarisse being chosen for a secret mission. They had to infiltrate a Titan - held fortress. On their journey, they faced many challenges. Percy's ability to communicate with sea creatures helped them cross a large river, while Clarisse's strength was crucial in breaking through some barricades. Along the way, they shared stories of their pasts, their insecurities and dreams. By the time they reached the fortress, they had a deep bond. They managed to complete the mission, and this experience changed their relationship forever.
Percy could react by ignoring Clarisse at first. He might think that if he doesn't give her a reaction, she will stop. But when that doesn't work, he could start to fight back verbally, using his quick thinking to come up with comebacks.
Overcoming differences is also a major theme. Percy is a son of Poseidon and Clarisse is a daughter of Ares, and their godly parents' rivalry often plays into their relationship. Fanfics explore how they can look past this and form a connection. Additionally, growth is a theme. Both characters grow as individuals as a result of their relationship in many of these fanfics.
One popular 'Percy and Clarisse lemon fanfic' could be 'The Unlikely Bond'. It delves into their relationship in a really interesting way, showing how their initial animosity could potentially turn into something more. Another one might be 'Clarisse's Hidden Feelings' which explores Clarisse's perspective and her growing attraction to Percy.
One popular 'Percy and Clarisse fanfic' is 'The Unlikely Alliance'. It shows how they have to work together against a common enemy and gradually develop an understanding of each other.
A common trope is 'character growth'. In fanfics like 'Clarisse's Evolution', we see Clarisse grow from a brash and sometimes mean character to someone more understanding and empathetic. Percy also often experiences growth in these fanfics. Another is the 'mystery quest' trope. For example, in 'The Quest for the Lost Artifact', Percy and Clarisse go on a quest to find a powerful artifact. It involves a lot of mystery - solving and adventure. And don't forget the 'forbidden friendship' trope in some fanfics where their friendship is frowned upon by others at first.
One great fanfic is 'Clarisse's Redemption'. It shows Clarisse in a new light, dealing with her insecurities while still maintaining her tough exterior. Another is 'Percy and Clarisse: An Unexpected Alliance' which focuses on how they put aside their differences to face a common enemy. And 'The Friendship of Percy and Clarisse' is also a good one, exploring how their relationship could develop into a deep friendship over time.
Another plot could be that Percy and Clarisse are trapped in a parallel dimension. In this dimension, the rules of Camp Half - Blood are different, and they are considered outcasts. They have to find a way to get back to their own dimension. Along the way, they meet strange versions of their friends and enemies. They rely on each other's unique skills. Percy uses his wits to figure out the strange magic at work in this dimension, while Clarisse uses her courage to face the dangerous creatures. As they work together, they grow closer and finally find a way back home, with a much - improved relationship.
In this type of fanfic, there could also be a scenario where Percy decides to stand up to Clarisse in a more physical way. He trains hard and when Clarisse tries to bully him again, he challenges her to a duel or a competition. Percy manages to win, earning Clarisse's respect in the process, which then ends the bullying.