Maybe it starts with fem Harry accidentally ending up in Wakanda. She and T'Challa initially clash due to their different cultures and ways of doing things. But as they get to know each other, they discover a deep connection and start to fall in love. Along the way, they have to deal with opposition from some in Wakanda who are skeptical of an outsider being so close to their king.
There are many fanfiction platforms where you might find such stories. Try Archive of Our Own (AO3). Just go to the site and use the search bar to type in 'fem harry is the mate of t'challa'. It has a vast collection of fanfictions, and you're likely to discover some great reads there.
Another theme is the idea of power. Both Harry Potter (even as a female version) has her own magical powers, and T'Challa has the power of the Black Panther and the leadership of Wakanda. Fanfictions might explore how they use their powers together, or how their different understandings of power can either clash or complement each other. For example, in some fanfictions, they use their combined powers to face a greater threat that neither could handle alone.
I'm not entirely sure if there is a specific 'fem Harry is the mate of Aquaman' fanfiction. However, given the vastness of the fanfiction community, it's very likely. There are fanfictions that cross over characters from different universes all the time. Maybe it's out there waiting to be discovered by fans who enjoy this kind of creative and out - of - the - box pairing.
There's also 'A Meeting of Worlds' which delves into how fem Harry Potter's magic would interact with the advanced technology of Wakanda under T'Challa's leadership. It's a fascinating exploration of two very different fictional universes colliding in a harmonious way. The character development in this fanfiction is quite well - done as they learn from each other's cultures and powers.
In this fanfiction, Fem Harry might come from the wizarding world but be a reincarnation of an ancient goddess. Zeus, sensing her divinity, is drawn to her. Their relationship could be filled with power struggles as Harry is used to being independent and Zeus is used to being in control. It would make for an interesting dynamic as they try to understand each other's worlds and powers.
Some common themes could be alternate universes where Tony and T'Challa have different genders. It might also explore their relationship in a new light, perhaps a romantic or a strong friendship dynamic. Another theme could be how their changed genders affect their roles within the Marvel universe, like how Fem Tony might approach technology differently or Fem T'Challa might lead Wakanda in a unique way.
One common theme is cultural exchange. Since Bucky comes from a different background compared to T'Challa and Wakanda. Their interactions often involve learning about each other's cultures. For example, Bucky might be introduced to Wakandan technology and traditions, while T'Challa learns about the modern world through Bucky.
In Harry Potter and T'Challa fanfiction, one could imagine T'Challa as a wizard attending Hogwarts. Maybe he'd bring his Wakandan knowledge of magic and technology, which is different from the traditional magic in the Harry Potter universe. He could form an interesting friendship with Harry, Hermione, and Ron, sharing his unique perspective on power and responsibility.
One aspect could be the dynamic between them. In fanfiction, fem Harry might bring her own set of skills and personality traits. For example, if she has her magic from the Harry Potter universe, it could create an interesting power balance with Eric's vampire abilities. Their relationship could start off as a meeting of two strong - willed individuals. Maybe they first cross paths during a supernatural event where both their skills are needed. And as they get to know each other, a romantic bond starts to form. The fanfiction could explore how they navigate the differences in their species, like Harry's mortality (assuming she's still mortal in this fic) compared to Eric's immortality.