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.
In other fanfictions, it could be a source of anxiety for him. Peter might worry about how this new aspect of his life will affect his relationships with his loved ones, especially if they have certain expectations of him. He could also be concerned about how it will impact his public image as Spider - Man, even if that's just in his own mind.
Most fanfictions about such topics are likely to be adult - themed. However, there might be some writers who handle the concept in a more innocent or implied way. But it's not very common to find one that is completely appropriate for all audiences as the idea itself is quite mature.
Another way it could be presented is in relation to his superhero identity. The stress and danger he faces as Spider - Man might make him more hesitant or eager (depending on the writer's take) to have this kind of intimate experience. For example, a fanfic could show how he finally decides to open up in this way after a particularly harrowing battle where he realizes life is short.
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.
Peter Parker could be part of a team - up with other non - Marvel heroes in a fanfiction. This would bring in new dynamics and storylines. Or a fanfiction could focus on Peter Parker's attempts to balance his normal life as a student with his superhero identity during a really tough academic year, with lots of exams and projects to handle.
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.
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.
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.
Peter's relationships can also be developed. His friends could come to visit him when he's sick. He might be more open with them about his insecurities as Spider - Man. And his enemies might take advantage of his weakened state, which forces him to grow and find new ways to defend himself even when he's not at his best.
Peter Parker could be developed by emphasizing his new - found spider - like curiosity. He might start exploring the city in a different way, noticing small details and hidden corners that he previously overlooked. This could lead to him discovering new threats or helping people in unexpected ways.
His superhero duties would likely be in chaos. He might not be able to swing as accurately or fight villains effectively. His reflexes would be slower.