Percy might feel a deep sense of contentment. He and Annabeth have a special bond, and having her trust him enough to sleep in his lap could make him feel warm and happy inside. He may also feel a bit nervous, not wanting to move and disturb her peaceful slumber.
It can develop through this moment of closeness. Just the act of her sleeping on him can show a level of trust, which Percy might recognize and it deepens their bond.
One possible scenario could be that they are on a long journey and Annabeth is exhausted. Percy offers his lap as a place for her to rest, showing his care for her. Another might be after a difficult battle where Annabeth is drained, and Percy's lap becomes a safe and comfortable place for her to recover.
He could be a bit surprised at first, but then a warm feeling would spread through him. He might gently stroke her hair or cover her with a jacket if she seemed cold, all while having a soft smile on his face.
Annabeth is known for her intelligence and strategic thinking. She is a strong and independent character. Percy, on the other hand, is brave and has a strong connection to the water due to his father being Poseidon. In the fanfic, when Annabeth sits in Percy's lap, it might be a way to show their unique relationship which has developed over the course of their many shared experiences in the Percy Jackson universe.
It shows closeness. Their physical proximity in this scenario indicates an emotional closeness too.
Percy is very brave. He doesn't hesitate to jump into dangerous situations, and Annabeth knows that he'll protect her. So his courage makes her feel safe.
Perhaps in this fanfiction, it could be a sign of their growing closeness. Annabeth sleeping in Percy's cabin might lead to some cute and awkward moments in the morning, like when Percy wakes up first and doesn't know how to react. It could also be a situation where they need to keep it a secret from the other campers to avoid any misunderstandings.
Well, it could be about a moment of pure comfort. Maybe they've had a tough adventure and this is a tender moment of rest. Annabeth feels safe and secure on Percy's chest.
On the other hand, she could try to honor Percy's sacrifice. Annabeth might focus on the reasons why Percy died for her and strive to fulfill any tasks or goals that he might have hoped she would achieve. She would carry on his legacy in a positive way, even though she is heartbroken.
She might focus on her studies more. Since Annabeth is really into knowledge, she could pour all her energy into her schoolwork, like spending extra hours in the library or on research projects.