One reason could be a shift in the plot where Annabeth's character development leads her to realize she and Percy are not compatible in the way they were initially thought. Maybe she has new goals or a different understanding of herself that makes her feel she's better off without Percy in the fanfiction world.
It can create a lot of emotional turmoil. Fans of the couple might be shocked and sad, which can draw them deeper into the story to see if there's any chance of reconciliation. It also often changes the direction of the plot. For instance, Percy might become more of a lone wolf type, or he could start on a journey of self - discovery.
In some cases, there could be a new love interest for Percy. Maybe a character who was always in the background but now steps forward to comfort Percy. This new relationship might be rocky at first as Percy is still hung up on Annabeth, but over time it could develop into something more serious.
In some fanfictions, it might be a plot device to create drama and tension. The author may want to explore how Percy and their child will cope without Annabeth, or how she will come to terms with her decision later. It could also be related to some hidden secrets or past traumas that resurface and make Annabeth believe she's not a fit mother or partner.
In a large number of Percy and Annabeth fanfictions, they are indeed presented as soulmates. Their shared adventures, the way they understand each other without many words, and the deep loyalty they have for one another all contribute to this perception. Fanfiction authors often build on their existing relationship from the original works and enhance it to the level of soulmates. They might show it through things like Percy being able to sense Annabeth's distress from afar, or Annabeth always knowing exactly what Percy needs in difficult situations. This soulmate - like relationship makes for very engaging and heart - warming stories in the fanfiction realm.
On an emotional level, it can engage the readers more deeply. They will be curious to see how the characters heal or if they can reconcile. It can also change the overall tone of the fanfiction. If it was a light - hearted story before, this event can turn it into a more serious and emotional one, exploring themes like loss, love, and family in a different way.
It could be that Annabeth has a misunderstanding about Percy. She might think he's a threat to her position or status at the camp, so she bullies him to try and keep him in check.
It could be Chiron, the centaur. He's always keeping an eye on the campers and would likely be concerned if he caught them up to something. He might give them a stern talking - to and some extra chores as punishment.
Percy might be a bit flustered and embarrassed. He's protective of his relationship with Annabeth, so having Magnus walk in might make him feel like their privacy has been invaded. He could quickly try to shield Annabeth or just look really shocked.
Their shared experiences play a big role. They've been through so much together, like countless battles and adventures. Percy has seen Annabeth in tough situations and he knows how strong she is, but also how vulnerable. So he feels the need to protect her. For instance, they might have had a close call in a previous adventure where Annabeth was nearly killed, and that memory makes Percy extra vigilant.