In fanfiction, when they meet mortals, it could lead to some comical situations. Maybe the mortals mistake Percy for a street magician when he accidentally makes a little water trick happen. And Annabeth could be trying to explain away their Greek - looking outfits as part of a theater production they are in. Also, they might meet mortals who are in danger and they have to save them without revealing their true identities, like when they come across a mortal about to be hit by a car and Percy just manages to push the mortal out of the way super - fast.
Well, they might have to hide their demigod powers. For example, Percy could be really tempted to use his water - controlling abilities when they are near a big fountain in front of mortals, but he has to hold back. Annabeth would be using her wisdom to come up with quick lies if the mortals start asking too many questions about their strange behavior or the weapons they carry.
Typically, there are curious students. They are often in a learning environment, like a high school or college, and they accidentally stumble upon Percy and Annabeth's secret. They might be studying mythology and are really interested in finding out if the stories are real.
They might lead normal lives, going to school, getting regular jobs. Maybe Percy would be a lifeguard at a local pool and Annabeth could be an architect student. Their relationship would lack the drama of demigod battles but would be filled with normal human challenges like dealing with family, exams, and making ends meet.
The fanfiction 'Mortals meet Annabeth's boyfriend' might have the mortals being really curious about their relationship. They could start asking all kinds of questions about how they met, what they like about each other. And perhaps Annabeth's boyfriend has to prove himself to the mortals in some way, like showing his strength or intelligence to gain their respect.
In fanfiction, when Percy and Annabeth meet, they might have a super sweet reunion. Maybe they'll share a warm hug and exchange some inside jokes that only they understand. It could be in a new and exciting setting, like on a mysterious island they've never been to before.
In some fanfictions, mortals might meet Percy and Annabeth in a coffee shop. Percy could accidentally use his powers to make a small water fountain out of a cup, and Annabeth would quickly cover it up while the mortals are left wondering what just happened.
They might have a really emotional reunion. Percy could give Annabeth a big, warm hug and they'd start reminiscing about their past adventures together, like the time they were in the Labyrinth or on their quests.
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.
They might go on an adventure together. Maybe they discover a hidden beach or a mysterious cave. They could also have some really deep conversations about their past experiences and their future plans.
They might start collaborating on a big project. Since they are both intelligent and resourceful, they could combine their skills to solve difficult problems at work.
One possibility is that there is a bit of a culture clash. Percy comes from a world where he's used to the demigod lifestyle and Annabeth has her own set of family values from her mortal family. So when they meet the parents, there could be misunderstandings. Maybe Percy doesn't understand some of the traditional mortal family things that Annabeth's parents expect, like formal dinners or certain etiquettes. And Annabeth might have to explain Percy's rather unorthodox upbringing to her parents, which could be quite an adventure in the fanfiction world.