Obviously, Peter is the main character. There could also be his neighbors who might play a role. For example, an old lady next door who gives him advice or a young boy who is curious about Peter's solitary life.
In this type of fanfiction, Peter is central. But there might be delivery people who become recurring characters. They could notice Peter's solitary existence and strike up brief conversations with him. And then there could be a local store owner where Peter buys his groceries. This store owner might be a character who has known Peter for a long time and has some interesting insights into his personality.
Peter is the mainstay, of course. Sometimes, there could be a stray cat that becomes an important character. The cat might visit Peter regularly, and he might start taking care of it. Additionally, there could be a postman who is always curious about Peter's situation and tries to be friendly. These characters add depth and variety to the story of Peter living alone.
Sasuke could also appear in some fanfictions. Maybe he comes to visit Naruto in his isolated place, and they have a heart - to - heart talk that helps them resolve some of their past issues.
A great storyline could involve Peter deciding to learn a new skill like cooking. Since he lives alone, he has all the time to experiment. He might start with simple recipes and gradually progress to more complex ones. Along the way, he could share his food with his neighbors and form new relationships, which would be a big change for someone who lives alone.
The neighbors in general are also quite popular in fanfiction. There could be an older neighbor who is a retired artist. In fanfiction, this neighbor could start teaching Kotaro how to draw, which helps Kotaro express his feelings in a new way and also gives him a new hobby.
Maybe the Vulture could make a comeback. In this fanfiction, he might be out of prison and looking for revenge on Peter. Or it could be a new villain that has heard about the young Spider - Man patrolling alone and sees it as an opportunity to take him down. And of course, there's always the possibility of Aunt May finding out more about his solo patrols and getting worried.
One common theme is self - discovery. Since Peter is alone, he often has to figure out his own strengths and weaknesses. Another is sacrifice. He might have to give up certain things to uphold his role as a hero.
Self - discovery is a common theme. Since Peter is alone, he often has to figure out who he is without the influence of others.
One character could be Dobby. Even though Harry is living alone, Dobby might still find a way to visit him and offer his help. Another could be the Hogwarts ghosts. They can pass through walls and might visit Harry in his solitary abode.
Obviously, Peter Parker himself is a common character. Then there are his friends like Ned Leeds. Ned often plays a role in helping Peter with his gamer - related adventures, maybe providing tech support or just being a sounding board for his ideas.
MJ (Mary Jane) is often a common character. She would have a very different dynamic with Peter as a girl. Also, Aunt May is usually there. Her relationship with Peter would likely change in interesting ways, as she might have different concerns and advice for a female Peter. Another common character could be Ned. His friendship with Peter would be different, and he might be one of the first to notice the changes in Peter's behavior due to the gender swap.
Hermione could still be a common character. Even in fanfiction where Harry is alone, Hermione might be mentioned in his thoughts or in flashbacks as someone who has influenced him. For example, he might recall her advice on how to study magic when he is facing a difficult spell alone.