The idea of an unlikely friendship or more can be a theme. Since they are from different worlds in the Marvel universe, seeing how they come together and form a bond, whether it's platonic or romantic, is a theme that many fanfics might explore. For example, they could team up against a common enemy that neither could face alone, and during that time, their relationship develops.
One common theme is the balancing act of Peter's superhero life with his relationships. He has to keep his identity a secret from his harem members, which creates a lot of drama and tension. Another theme is the growth of the relationships within the harem. They start as friends or acquaintances and gradually develop deeper feelings for each other.
One common theme is the clash of different worlds. Peter comes from a more ordinary, albeit super - hero filled, world in New York, while Loki is from Asgard, a realm of gods. Their different backgrounds often lead to misunderstandings and then growth as they learn about each other.
One common theme is self - discovery. The OC often helps Peter to discover new aspects of himself, whether it's related to his powers or his personal life. For example, in some stories, the OC might encourage Peter to be more confident outside of his Spider - Man persona.
Another theme could be the exploration of their different worlds colliding. Peter's New York and Shuri's Wakanda are very different places, and fanfictions often play with how they interact in each other's environments. Also, there's the theme of mutual respect and admiration that develops into a deeper relationship over time.
Team - up is a very common theme. Writers like to imagine how they would work together in a fight. Also, mentorship can be a theme. Thor, being much older and more experienced, could potentially mentor Peter in some aspects. And of course, there's the theme of friendship that develops between two very different individuals.
Mentorship is a very common theme. Tony is often portrayed as guiding Peter in his superhero journey. Another is family, as their relationship can be seen as a father - son or big - brother - little - brother type. And of course, there's the theme of heroism, where they work together to save the day.
One common theme is the exploration of their powers. How Wanda's chaos magic and Peter's spider - abilities can work together or sometimes clash. For example, in some fanfics, they have to learn to control their combined powers to defeat a powerful villain.
Friendship is a very common theme. Peter Parker is often portrayed as forming a deep and meaningful friendship with the male reader. They support each other, have each other's backs, and grow together. Another theme is discovery. The male reader may discover Peter's secret identity, or Peter may discover something unique about the male reader. Adventure is also common. They go on adventures together, whether it's fighting crime in New York or exploring some mystery.
In many Ava Ayala x Peter Parker fanfictions, the theme of mentorship can be seen. Peter, with his more experience in the superhero world, might mentor Ava. Or vice - versa, as Ava has her own set of skills and knowledge. Another theme is the struggle between their normal lives and their superhero lives. They have to balance school, family, and friends while also dealing with the threats to the city. This internal conflict is often explored in these fanfictions, along with the external threats they face together.
Well, a frequent theme is the exploration of their different cultures. Peter from a normal human family (well, as normal as it can be with his backstory) and Starfire from Tamaran. Also, there's often the theme of them learning to trust each other. They both have secrets and responsibilities, and in these fanfictions, they gradually open up to one another and that deepens their romantic bond.