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.
Their relationship in the fanfiction could develop in a more mature way. College is a time of self - discovery, and they would be no exception. Percy might become more confident in his abilities and be more assertive in the relationship. Annabeth could become more empathetic towards Percy's insecurities. They could also start planning for their future together, like thinking about post - college life and how they can continue to fight for the good of the demigod world while also having a normal life. Maybe they even consider starting a demigod training program for future generations on their own.
In a fanfiction, they might meet in a dangerous, enchanted forest. Percy has been lost in there for days, and Annabeth has come to find him. As Percy hears the rustling of leaves, he gets ready to fight, but then he sees Annabeth emerge from the bushes. Annabeth quickly assesses the situation and starts leading Percy out of the forest, all while they catch up on what has happened since they last saw each other. There are strange creatures lurking around, but they feel safer now that they are together.
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.
There could be a school janitor who is actually an old demigod who retired from the hero business. He could give Percy some valuable advice based on his own experiences. And of course, Percy will surely meet Annabeth's classmates, some of whom could be friendly and some not so much, depending on how they react to the new boy in school.
Grover could be one of Percy's friends to meet Annabeth. He's a satyr and has been with Percy through a lot. When he meets Annabeth, he might be really happy to see another important person in Percy's life.
One possible plot could be that Percy and Annabeth accidentally join the same online gaming group. They start off as rivals within the game, constantly trying to outdo each other in quests and challenges. But as they communicate more through the chat function, they start to realize they have a lot in common. They gradually become friends and start sharing their real - life problems. Eventually, they plan to meet in person at a gaming convention.