Perhaps Percy has received some bad news or a prophecy that makes him think that by ignoring everyone, he can protect them. So he distances himself from his friends and family, and the fanfiction could explore how they react to his sudden cold - shoulder. They might try to figure out what's wrong with him and how to bring him back to his normal self.
Well, perhaps in this fanfiction, Harry has been through so much that he decides to isolate himself from everyone. He might be tired of the constant danger and the expectations placed on him. So he shuts out his friends like Ron and Hermione, and just focuses on his own inner journey, maybe to discover some new magic that he believes can only be found in solitude.
Percy's family members could be in the fanfiction too. His mom, for example, would be worried sick if Percy started ignoring everyone. She'd be trying to figure out if something happened at school or with his friends. His dad, Poseidon, might also play a role, perhaps sensing Percy's distress from afar and trying to intervene in some way.
Perhaps Naruto has a new power that he doesn't understand and it's making him act strange. This power could be related to some ancient jutsu. As a result, he starts to ignore everyone because he's afraid of hurting them or because he's constantly in a trance-like state due to the power's influence. His friends would then try to figure out what's wrong with him and how to bring him back to normal.
It could also speed up the plot in a different way. If Naruto ignores everyone, some villains might see this as an opportunity to attack. Since Naruto is usually a key defender, his withdrawal could lead to more immediate threats to the village. This would force the other characters to step up in different ways than they normally would. They might have to form new alliances or develop new powers quickly to fill the void left by Naruto's ignoring behavior.
Well, it could create a lot of tension. If Harry ignores everyone, it might lead to misunderstandings. His friends might feel left out or hurt, which could drive a wedge in their relationships. This in turn can change the whole dynamic of the group. For example, they might not be as united when facing challenges, and it could also lead to some of them trying to figure out why Harry is acting this way, adding a mystery element to the plot.
One reason could be that the author wants to create drama. By having Percy ignore Annabeth, it can lead to a lot of tension and conflict in the story, which makes it more interesting for readers. For example, it might be a plot device to introduce a new character who then tries to comfort Annabeth, leading to a love triangle situation.
Maybe he got some kind of curse. In the Naruto universe, there are all sorts of dark magic and curses. If he was cursed, it could make him withdrawn and cause him to ignore everyone.
One possible plotline could be that Percy's sacrifice leads to a new era of peace in the fictional world. His death might inspire the other characters to come together and fight against the common enemies more fiercely. For example, his friends could form a stronger alliance to protect the world he gave his life for.
One possible plot could be that Percy finds himself in a world where everyone he knew has had their memories wiped about him. He might start by trying to figure out what caused this. He could go to his old friends' places, only to be met with blank stares. Then he might try to find a way to reverse the situation, perhaps by going on a quest to find a magical artifact or meet a powerful being. Along the way, he could face challenges alone, as he has no one to rely on, which would force him to grow and discover new abilities within himself.
Well, it could be that Percy has had some really bad experiences in his life that made him bitter towards everyone. Maybe he was betrayed by friends in the past, so now he just can't bring himself to trust or like anyone.