A common theme is friendship. Their bond might start as a simple friendship and then develop into something more. Another theme could be redemption. Maybe one of them has made mistakes in the past and the other helps them find a new path. Love is also a big theme, of course, whether it's a slow - burn love or a love at first sight kind of situation.
One popular tony x piper fanfiction might be 'The Unlikely Bond'. It explores their relationship in a really unique way, with great character development. Another could be 'Tony and Piper's Adventure', which takes them on an exciting journey full of twists and turns. There's also 'A New Beginning for Tony and Piper' that focuses on how they start anew and face challenges together.
One good oc x piper fanfiction could be 'The Unlikely Bond'. In this story, the original character (oc) might be a new camper at Camp Half - Blood who has some unique powers. Piper is initially skeptical but as they go on quests together, they form a deep friendship that could potentially turn into something more. It has great character development and an engaging plot.
One common theme is the exploration of their different personalities. Reyna is often seen as strong and stoic, while Piper is more free - spirited. Fanfictions might explore how they balance each other out. Another theme could be them facing challenges together, perhaps in the context of the Percy Jackson universe's quests. Friendship - turned - love is also a popular theme, as they start off as comrades and gradually develop deeper feelings for each other.
Since it's a crossover, it combines elements from both Naruto and Piper McLean's universes. However, as it's a 'lemon' fanfiction, it may involve romantic or sexual undertones between the two characters which might be a bit out of the ordinary given their different origins. But in general, it would probably play with their powers and personalities in a new context.
There are several common themes. First, there's the theme of sacrifice. They might sacrifice their own desires or positions for the sake of their relationship. Second, adventure - themed love is also common. They go on adventures together and their relationship deepens during these experiences. Also, the theme of self - discovery through their relationship is often explored, as they learn more about themselves while being with each other.
There are indeed. Fanfiction.net is also a great place to check. Many authors have delved into the idea of Percy and Piper being in a relationship. The stories can range from them falling in love in a modern AU (alternate universe) setting to having a relationship develop during their adventures in the original universe. You just need to spend some time exploring the tags and summaries to find the ones that suit your taste.
There's a fanfic called 'Unexpected Romance: Percy and Piper'. In this story, the author takes their friendship and slowly turns it into a romantic relationship through a series of adventures. They face challenges together, which deepens their bond. For example, they have to work together to defeat a new enemy in the story, and during that process, they realize their feelings for each other.
One common theme could be power dynamics. Given that Master Cyclonis has a certain amount of power, how that interacts with Piper could be explored. Maybe Piper challenges that power in some way.
You can try Archive of Our Own (AO3). It has a large collection of fanfictions, including many about Piper and Percy. Just use the search bar and type in 'Piper x Percy' and you'll get a bunch of results.