One common theme is transformation. The black cat might transform into a human - like form or a more powerful creature within the Naruto universe. This allows for interesting interactions with the Naruto characters.
One common theme could be the clash of different worlds. Naruto comes from a world of ninjas and chakra, while Black Cat has its own unique setting. So, the exploration of how these two different universes interact is often seen. Another theme might be the development of new relationships between characters from both series.
A third common theme is the idea of the underdog. Naruto was an underdog in his own ninja world, and the cat is often portrayed as an underdog as well. Together, they overcome challenges and prove that even the smallest or most overlooked can achieve great things. For instance, the cat might be a runt that Naruto helps to become strong, and in turn, the cat helps Naruto in unexpected ways.
One common theme is mystery. Since Shiki is a black cat, which often has connotations of mystery in many cultures, fanfictions tend to play on that. Another theme is adventure, as the idea of a cat going on exciting journeys is quite appealing.
One common theme could be mystery. Since black cats are often associated with mystery in many cultures, fanfictions might play on that. Another could be adventure, with the black cat character going on various quests or facing challenges.
A common theme is the exploration of their moral differences. Venom is often portrayed as more of an anti - hero with a darker side, while Black Cat has her own code of ethics that is more in the gray area. Another theme is the idea of power dynamics. Since Venom has superhuman strength and abilities through the symbiote, and Black Cat has her acrobatic skills and thieving expertise, how they interact in terms of power is often explored.
A common theme is the idea of female empowerment. Both Catwoman and Black Cat are strong, independent female characters, and in fanfictions, they often take charge and outwit male villains. For example, in many stories, they use their wits and agility to steal valuable items right from under the noses of powerful male criminals.
A common theme is redemption. Since the Black Cat has a bit of a shady past as a thief, in fanfiction she often tries to atone for her past deeds by helping the Avengers.
One of the most prevalent themes is transformation. This can be both literal, like Eve changing forms in some stories, and metaphorical, such as her changing in personality or perspective. Another common theme is the struggle against evil. Eve sometimes has to face off against bad characters or forces that threaten her world or her friends. There's also the theme of homecoming. In some fanfictions, Eve gets lost or displaced and has to find her way back home, which is a journey filled with challenges and growth.
One common theme is mystery. The cat often brings an element of mystery to the story. Another is loyalty, as the cat might be fiercely loyal to a particular character.
One common theme is friendship. Just like Naruto forms strong bonds with his human friends, the stories often focus on how he forms a deep friendship with the cat. For example, they might support each other during battles or in times of emotional distress.