It could also be due to jealousy. If there was another character who seemed to be getting closer to Percy, Annabeth might lash out in a way that hurts his feelings. Like if a new demigod joined their group and Percy was being friendly, Annabeth might feel threatened and say something mean.
One possible reason could be miscommunication. Maybe Annabeth said something without realizing how it would come across to Percy. For example, if she was stressed about a quest and snapped at him when he was just trying to be helpful.
Another reason might be that Annabeth has her own insecurities. She might be afraid of losing Percy in some way, like if he was getting more powerful and she was worried he'd outgrow her. So she could push him away by hurting his feelings, not realizing it's a self - destructive behavior.
He could become withdrawn. Percy might start to distance himself from Annabeth, not wanting to be around her if she's going to be cruel. He might go off on his own and think about what she said, trying to figure out if he did something wrong.
Annabeth could be shocked at first. She might not have expected Percy to be so straightforward with his feelings. She would need a moment to process what he's said, and then she might respond in a more measured way, like asking him some questions to make sure he's serious.
Well, one possible reason could be that Percy made a really stupid decision without consulting Annabeth first. Like, if he went off on a dangerous mission on his own when they were supposed to be a team. Annabeth is a very strategic person and she might feel betrayed or extremely frustrated by such actions.
It could also be due to some sort of magic or mind - control. A powerful enemy might have cast a spell on Annabeth, forcing her to turn against Percy. In this case, it's not really her own will but the result of external manipulation.
Maybe she's scared because the fanfiction portrays Percy in a way that's out of character for him. Like, it might show him being overly aggressive or having strange powers that she doesn't recognize, which makes her feel like she doesn't really know him anymore.
One scenario could be that Percy confesses his feelings during a dangerous quest. Maybe they're in a life - or - death situation and he realizes he can't hold back anymore. He tells Annabeth that he loves her more than just a friend, and it gives them both new strength to face the danger.
Maybe it's a sign of closeness between them. In many relationships, sharing or wearing each other's clothes can show a deep bond. Annabeth might be cold and Percy's clothes are just there and convenient.
One possible reason could be jealousy. Maybe Percy gets more attention or recognition in their fictional world that makes Annabeth envious and thus appear to hate him.
In the fanfiction world, their personalities might be very complementary. Annabeth is intelligent and strategic, while Percy is brave and impulsive. This yin - yang dynamic could lead to a strong attraction, and the want to kiss could be a natural outgrowth of that attraction.
Maybe in some fanfictions, Annabeth could be written as betraying Percy's trust. For example, she might side with his enemies or reveal his secrets, which would deeply wound Percy emotionally.