In the fanfiction, the overprotectiveness might show up as the gods restricting Percy's actions. They may not let him go on certain quests alone, insisting on sending a whole entourage of helpers. This could be because they see Percy as a very important asset, and they're afraid of losing him. So they overcompensate by being overly protective.
Well, she might constantly be by Percy's side during dangerous situations, like when they are facing monsters. She could also be very cautious about who Percy interacts with, fearing they might harm him.
Well, Minato might constantly be by Naruto's side in the fanfiction. He could prevent Naruto from taking on any dangerous missions, even if Naruto is capable. For example, he may interfere when Naruto tries to join a risky battle against a powerful enemy, saying it's too dangerous for him.
It could be that Percy has a special connection to one of the major gods. For example, if he's related in some way to Zeus or Poseidon, the other gods would be extra careful with him. Also, Percy might have done something in the past that made the gods feel indebted to him, and this overprotectiveness is their way of repaying him.
Well, it really depends on how the author writes it. If the overprotectiveness is written in a way that respects Marinette's agency, it could be a cute and endearing aspect of their relationship. But if it comes across as controlling, it might make Marinette resent Adrien, and then they would have to work through those issues to have a healthy relationship.
Nico might initially be frustrated. He wants to prove himself and show that he can take care of himself, but Hades' overprotectiveness holds him back.
One reason could be guilt. Since Minato wasn't there for Naruto when he was growing up in the original story, in the fanfiction, he might be overcompensating for that lost time. He feels like he has to make up for all those years he wasn't around to protect his son.
Well, in such fanfiction, it could be shown by team 7 members always coming to Sakura's rescue immediately. For example, if she's in a fight, they might jump in even before she has a chance to defend herself fully. They might also constantly worry about her well - being and not let her take on dangerous missions alone.
Well, in a lot of these fanfictions, Hades might be overprotective in terms of Nico's social interactions. For example, if Nico wants to make new friends among the demigods, Hades might be hesitant and try to limit it. He could be worried that Nico will get hurt either physically or emotionally. Also, when it comes to Nico's training or using his powers, Hades might be overly cautious and not let him push his limits as much as Nico wants to, fearing that he could lose control or get injured in the process.
However, as time goes by, Ash could come to understand that Mewtwo's overprotectiveness comes from a place of care. He might start to rely on Mewtwo in certain situations, like when they are in an extremely dangerous and unfamiliar territory. Ash could also try to communicate with Mewtwo, asking it to let him handle some things on his own while still appreciating its protection.
Maybe she sees Percy as a younger brother she needs to protect. She might have a sense of responsibility towards him.