One possible plot could be Percy and Annabeth facing new challenges in college. Maybe they have to deal with difficult classes related to Roman mythology that are different from what they learned before. For example, they might study the Roman version of battles and how it differs from the Greek. They could also face social challenges, like making new friends among the Roman demigods who have different values and traditions compared to their Greek friends.
Perhaps the fanfiction could be about their relationship growing in the new college setting. They have to balance their studies, their duties as heroes, and their relationship. There could be some jealousy from other students who admire either Percy or Annabeth. And they also have to figure out how to live in a more Roman - style environment, like dealing with different dormitory rules and campus traditions that are based on Roman culture.
There could be a strict Roman professor who is very traditional and gives Percy and Annabeth a hard time in their classes. This professor might not trust the Greek demigods at first and constantly tests them. Another potential character could be a Roman demigod who becomes their friend. This demigod could introduce them to all the cool spots in New Rome and help them understand the Roman way of life better.
One possible plot could be Percy and Annabeth adjusting to college life while also dealing with new mythological threats. Maybe they have to take on a monster that is hiding in the college library, using their demigod skills and the knowledge they gain from their classes.
Their college life would likely be a blend of normal and extraordinary. Since they are demigods, they might have to secretly keep an eye out for any monsters that could disrupt their studies. In terms of their relationship, they would support each other in every way. Percy would cheer Annabeth on during her late - night study sessions for big architecture projects, and Annabeth would be at every swim meet, shouting for Percy. They'd also find time to explore the campus and find hidden, magical spots that only they could sense.
They might face new challenges like dealing with difficult professors. In college, the academic pressure could be a big deal for them. Percy might struggle with some theoretical subjects, while Annabeth could thrive. And they could also encounter new mythological creatures that are lurking around the college campus.
One possible plot could be Percy Jackson having to navigate the complex politics of Rome as the King. He might face challenges from rival factions within the Roman demigod community who don't want an outsider like him in power. He could also be tasked with protecting Rome from new and powerful monsters that are specifically targeting the city because of his rule.
Perhaps the fanfiction could focus on Percy's relationships in his role as emperor. He could form alliances with other demigods in Rome. His relationship with Annabeth might also be affected. She could visit him in Rome and they could work together to solve problems, or there could be tension due to the differences between the Greek and Roman worlds.
In fanfiction, they might first be a bit shocked to see each other. Then they could start reminiscing about their old adventures. Maybe they'll decide to team up again for some college - related mystery.
One possible plot could be about their journey of preparing for the baby. Percy might be worried about protecting his family from the various threats in their world, while Annabeth could be focused on creating a stable home environment. They'd also have to deal with the reactions of their friends like Grover and the other demigods.
One possibility could be that they are in a school setting where they have to wear uniforms. Percy might constantly be getting in trouble for not following the uniform code properly, like having his tie askew or his shirt untucked. Annabeth, being more organized, tries to help him out. This could lead to some comical moments as well as deeper conversations about fitting in and following rules.
Well, perhaps Percy takes Annabeth on a quest to a special location, like an ancient Greek ruin they've always wanted to explore. During this adventure, he finds the perfect moment when they're alone and surrounded by the beauty of the place to pop the question.