One common theme is acceptance. The OC Inhuman often has to struggle to be accepted by the Avengers due to their different nature. Another theme is power control. Since Inhumans have unique abilities, they usually need to learn to control their powers in the fanfiction.
The theme of overcoming prejudice is quite prevalent. Many times, the mutant OC faces prejudice from within the Avengers or from the outside world. They have to overcome this and prove their worth. Additionally, the theme of self - discovery is often explored as the OC discovers new aspects of their powers and themselves.
One common theme is the clash of different mythologies. Since Anubis is from Egyptian mythology and the Avengers are set in a modern - day superhero world with its own lore, there's often a theme of how these two different belief systems and power sets interact. For example, how Anubis' powers related to death might be perceived in a world with superheroes who have more scientific - based powers.
One common theme is friendship - turned - romance. Usually, two female characters start as friends or comrades in the Avengers - related setting and then their relationship evolves into something more romantic.
One common theme is the outsider - within concept. The OC is usually an outsider who then becomes part of the Avengers' world, and the harem forms around that dynamic. Another theme is the exploration of different powers and how they interact. For example, if the OC has a unique power, how does it mesh with the powers of the Avengers in the context of the relationships.
One common theme is mortality. Since there's a god of death oc, it often makes the Avengers confront their own mortality more directly. Another theme is power and its limits. The god of death oc usually has powers that are quite different from the Avengers, and they have to figure out how to co - exist with such a powerful being.
Another theme is the OC's relationship with the established Avengers characters. Some fanfictions focus on the OC forming friendships, romances, or rivalries with the likes of Iron Man, Captain America, etc. It adds a new layer of drama to the Infinity War story. For example, an OC might start off as a fan of Tony Stark and then end up having to work with him during the war. The dynamic between them can be very interesting.
One common theme is the discovery of the soulmate bond. The OC usually has to figure out their connection to the Avengers. Another theme is acceptance. The Avengers have to accept this new person in their midst who is their soulmate. And of course, there's often the theme of love and loyalty as the relationships develop.
Another theme is friendship. Captain America is known for his loyalty and strong moral compass. So in these fanfictions, the relationship between him and the OC often develops into a deep friendship. They support each other, like in the story where the OC is a war veteran and Cap helps them deal with their PTSD, creating a strong bond between them.
A common theme is power dynamics. Since Hela is very powerful, exploring how an OC can interact with her in terms of power is often seen. For example, whether the OC is intimidated by her power or tries to gain power from her.
One common theme is self - discovery. The male OC often has to figure out his place in the world of the Avengers and his own powers. For example, he might start off not knowing he has a special ability and then gradually discovers it through his adventures with the team.