One common theme could be chaos. The Joker is known for creating chaos, and when combined with the relatively ordered world of Harry Potter, it can lead to interesting stories about disrupting the magical order.
A possible theme is the contrast between good and evil. In Harry Potter, there's a clear divide between good and evil, but the Joker blurs that line. So, fanfics might explore how the characters from Harry Potter deal with this new type of 'evil' that the Joker represents. It could also be about madness. The Joker's madness could be a factor that infects the usually more rational characters in the Harry Potter universe.
One common theme is the clash of two different worlds. The orderly and magical world of Harry Potter with its own set of rules and the chaotic, lawless world that the Joker represents. Another theme could be the corruption of innocence. The Joker might try to influence the young wizards and witches at Hogwarts, corrupting their pure intentions.
The idea of insanity versus sanity is also prevalent. Joker's madness is contrasted with Batman's rationality, and many fanfics play around with how these two states can sometimes seem to blend or be misinterpreted. For example, in some fanfics, Batman might be pushed to the edge of his sanity by Joker's actions. Another common theme is the concept of redemption. Some fanfics might explore the possibility of Joker being redeemed, or Batman losing his way and having to find his own redemption. This adds a layer of depth to the characters and their relationship. It also makes the readers think about the nature of heroism and villainy in different ways.
One common theme is the duality of good and evil. Batman represents order and justice, while the Joker represents chaos. Fanfics often explore how these two opposing forces are intertwined. For example, some stories show how Batman's strict moral code can sometimes lead to unforeseen consequences, and how the Joker's chaos can have a strange kind of logic to it.
One common theme is the exploration of an alternative relationship. Instead of the more well - known pairings in the original series, it focuses on Harry and Daphne. Another theme is often the discovery of new magical elements. Since they are two different characters with different backgrounds, they might uncover something new together. Also, the theme of self - growth is present. As they interact, both Harry and Daphne usually grow as individuals.
A third theme is the element of disguise and secrecy. Crossdressing can be used as a form of disguise, much like the invisibility cloak in the original story. Fanfics often explore how Harry uses this new form of 'disguise' to his advantage, whether it's to outwit enemies or to gain access to places he otherwise couldn't.
Friendship and acceptance is also a big theme. The merman character is usually an outsider in the Hogwarts world, and the story often focuses on how the other characters come to accept and befriend him. This is similar to how Harry Potter was an outsider at first in the wizarding world but found his place. In some fanfics, the merman might face discrimination at first because of his different appearance and abilities, but then through his actions and the kindness of others, he becomes part of the community.
One common theme is the clash between the traditional wizarding legal system and new ideas. For example, a fic might explore how a young wizard or witch, trained in modern legal thinking, tries to reform the archaic laws of the Ministry of Magic. Another theme could be justice for the underrepresented, like house - elves or half - bloods. In these fics, the lawyer character would fight for their rights. Also, there's often the theme of mystery and intrigue as the legal cases might involve dark magic or secret societies within the wizarding world.
One common theme is the exploration of different social hierarchies. In the omegaverse, there are alphas, omegas, and betas. Fanfics often show how these hierarchies play out within the Hogwarts environment. For example, an alpha might be a natural leader in a Quidditch team.
Friendship is a big one. The Marauders were known for their tight - knit group, so fanfics often explore their deep friendships. Another theme is loyalty. They were loyal to each other through thick and thin.
One common theme is sacrifice. Mothers in the Harry Potter world, like Lily Potter, often sacrifice themselves for their children. In fanfics, this is explored further, showing how their sacrifice has far - reaching consequences. Another theme is protection. Mothers are always trying to protect their kids from the dark forces in the wizarding world.