His communication skills could be affected. Instead of his usual witty banter, he might be more growls and short, sharp commands. This is because his feral side has taken over some of his human communication tendencies. Also, his relationships with others would shift. His friends might be a bit scared of this new side of him at first, but then try to help him come to terms with it.
In fanfiction, the 'feral child' concept can make Naruto more instinct - driven. He might rely more on his gut feelings rather than traditional ninja training. For example, instead of following a set jutsu sequence, he might improvise based on his immediate senses. This can also make him more of an outsider in the village. His different behavior and way of thinking might not be easily understood by the other villagers, which could lead to more conflict or misunderstanding. But it also gives him a unique charm as he is not the typical well - behaved ninja - in - training.
One interesting idea could be Peter Parker using his feral instincts to better his crime - fighting skills. For example, his enhanced senses from being feral might help him detect danger more quickly in the city.
Well, it could make him more mature in some fanfictions. Once he experiences this, he might start to view relationships and life in a different light. He could become more confident in his personal life, which might also have an impact on how he approaches his superhero duties.
One idea could be that Peter Parker discovers an Infinity Stone by accident. Maybe he's on a routine patrol as Spider - Man in New York and stumbles upon a strange energy source that turns out to be an Infinity Stone. This discovery could put him in the crosshairs of many powerful villains who want the stone for themselves.
In some fanfictions, the umbrella could have a more symbolic meaning. For example, it could represent Peter's attempt to lead a normal life. Just as an umbrella shelters from the rain, Peter might see it as a way to shield himself from his superhero duties for a short time.
Peter Parker in the context of the Speed Force could be really interesting. The Speed Force is often associated with speedsters like The Flash. If Peter Parker were to be connected to it, perhaps he could gain super - speed in addition to his spider - powers. This could make him even more formidable in fighting crime in New York. He could use his speed to quickly web up villains or reach the scene of a crime in an instant.
In fanfiction, when Harry is a 'feral child', it often makes him more independent. He doesn't rely on the normal support systems like other Hogwarts students. For example, he might not trust adults easily as he's had to fend for himself. This makes his relationships more complex, especially with Dumbledore who he may see as just another authority figure at first.
His personality might become more in touch with his emotions. As a girl, Peter could be more empathetic and sensitive. He might also be more cautious in some situations, as society often treats girls differently. For example, he might not be as quick to jump into a fight without thinking about the consequences more carefully.
Peter Parker's secret genius could be shown in fanfiction through his amazing scientific insights outside of his Spider - Man activities. For example, he might be secretly developing new technologies that could benefit the world but is keeping it under wraps to avoid unwanted attention.
In this fanfiction idea, Peter Parker as the CEO of Stark Industries would bring a fresh perspective. He has his own intelligence and sense of justice from being Spider - Man. He might use Stark's resources to create more advanced tech for the good of the city, like better web - shooters or surveillance systems to combat crime.