It's possible that a fellow demigod, who has a bit of a rivalry with Percy, could be jealous. This demigod might think that Annabeth is giving Percy special treatment by picking him up from school, and wish that Annabeth would show the same kind of attention to them instead.
Maybe some of Percy's mortal friends who don't really understand his relationship with Annabeth. They see how close they are and might be a bit envious of the special bond they share. For example, if Percy's friend was interested in Annabeth but knew he didn't stand a chance because of her and Percy's relationship, he could be jealous.
Percy had been planning this for days. He knew Annabeth's school schedule by heart. He showed up at her school, his heart pounding a bit. When he saw her exit the building, he felt a rush of excitement. 'Annabeth!' he shouted. She looked up, a bit confused at first, then her face lit up. 'Percy!' They met halfway. Percy told her that he wanted to do something different and that picking her up from school seemed like a fun idea. As they made their way to Percy's ride, they shared stories of their recent adventures. Percy talked about a near - miss with a sea monster during his last swim, and Annabeth told him about an interesting debate she had in her history class. It was a moment of normalcy in their otherwise extraordinary lives.
One possibility is that when Annabeth picks Percy up, they run into some minor mythological creature that's lost in the human world. They then have to figure out how to get it back to where it belongs without causing too much chaos or attracting unwanted attention. This could lead to a series of comical and adventurous events as they try to communicate with the creature and find a way to send it home.
A plot twist could be that when Percy gets to the school, he realizes that Annabeth has disappeared. He starts to search for her and discovers that she has been lured into a trap set by an old enemy. This enemy has plans to use Annabeth as bait to draw Percy in and then defeat them both. Another interesting twist could be that as Percy is waiting for Annabeth, he is suddenly attacked by a group of disguised monsters. He has to fight them off while also trying to find Annabeth. And there could also be a twist where Annabeth has changed in some unexpected way, like she has lost her memory, and Percy has to figure out how to deal with this new situation while getting her home.
Often in such fanfics, the theme of competition is present. Percy's jealousy could be a result of a perceived competition with another character for Annabeth's attention. This could be related to their heroic deeds. If another character is getting more praise or recognition from Annabeth, Percy might become jealous. It's a way to explore Percy's complex emotions towards Annabeth in a different light.
A typical scenario could be when Annabeth spends a lot of time with another male character while working on a project. Percy might see them getting along really well and start to feel jealous. For instance, if they are building something together in the fanfic, like a new weapon or a structure, and Percy feels left out.
One possible fanfic could be about Percy and Annabeth facing a new mystery in high school. Maybe there's a strange teacher who seems to know more about their demigod past than they're comfortable with. Percy could be struggling with his ADHD in the academic setting, and Annabeth is constantly helping him study while also trying to solve the mystery of the teacher.
Well, they could go for a walk in the park and talk about their latest adventures. Percy might share some crazy story from his time at the beach, and Annabeth could tell him about a new book she's reading. Maybe they'll stop at their favorite ice - cream place and just enjoy each other's company.
The relationship between Percy and Annabeth in this fanfiction may develop as they engage in activities after leaving school. Maybe they decide to visit a museum related to Greek mythology. As they explore the exhibits, Annabeth's knowledge of the subject shines, and Percy is in awe of her intelligence. This mutual admiration and the shared interest in mythology can strengthen their bond. They might also have some light - hearted debates about different interpretations of the myths, which only deepens their connection.
Well, in many Percy - related fanfictions, if we consider Grover as Annabeth's friend, he might be jealous of Percy because Percy often gets more attention or seems to be more in the spotlight. Percy has a lot of heroic moments and is the son of Poseidon which gives him a certain status, and Grover might feel overshadowed at times.
Perhaps on the way, they discover a new place in the neighborhood, like an old abandoned building. They explore it together, and during the exploration, they find something that is related to their demigod world, like an old artifact. Working together to figure out what the artifact is and what it means would make their relationship more intertwined as they are sharing a new and exciting adventure.