In the fanfiction, Annabeth's reaction could be complex. She could be impressed by Percy's quick thinking and action. However, she might also feel a bit conflicted. On one hand, she's glad the spider is gone. On the other hand, she's a strong and independent character, and having Percy step in to deal with something she might see as a minor threat could make her feel a bit self - conscious. But overall, it would likely lead to a positive interaction between them, strengthening their bond in some way.
She might be grateful. After all, if she has a fear or aversion to spiders, Percy getting rid of it is a kind gesture.
Well, it could be a sign of his protectiveness towards Annabeth. Spiders might be something she fears or dislikes, and Percy, being the hero he is, takes it upon himself to get rid of it. It shows his love for her in a simple yet powerful way.
Annabeth could also be angry, not at Percy but at the situation or the forces that led to his death. She might vow revenge and start on a journey to find out who or what was responsible for Percy's sacrifice and make them pay. This could lead her into a whole new set of adventures and challenges as she tries to come to terms with her loss.
She might be heartbroken at first. She could try to jog Percy's memory by showing him things that were important to them.
No, it's not that common. Most fanfictions in the Percy Jackson fandom tend to focus on the positive relationships between the characters, like Percy and Annabeth's love story or the adventures of the demigods together. However, every now and then, some darker or more alternative takes like this one might pop up, but they are definitely in the minority.
She might be initially very angry. Annabeth is intelligent and perceptive, so she would likely feel betrayed that Percy thought he could deceive her. For example, if Percy lies about a mission, she could find out the truth later and confront him immediately, demanding an explanation.
He could also become withdrawn and depressed. Percy and Annabeth have a very strong bond, and her death would leave a huge void in his life. He might isolate himself from his friends and family, lost in his grief and memories of her.
Then, she would probably be angry. Annabeth is a strong - willed character. She would feel betrayed and used, and her anger would fuel her to find out the truth. She might start her own investigation to figure out what's really going on with Percy, whether he's been influenced by someone or if there's another reason for his actions.
One possible plot could be that Annabeth is under some kind of mind control. Maybe a powerful enemy has taken over her mind, forcing her to turn against Percy. Another could be a misunderstanding. For example, she might think Percy has betrayed her or their friends in some way, leading to a tragic confrontation.
The contrast between their abilities. Percy's powers related to water and Annabeth's intelligence make for interesting interactions when dealing with spiders. For example, Percy can use water to wash away small spiders, while Annabeth can strategize the best way to avoid getting caught in spider webs.
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.