A common theme is often the contrast between Fem Harry's more 'normal' or heroic background and Laughing Jack's more chaotic and dark nature. Their relationship might be about how they bridge this gap, like Fem Harry bringing out the good in Laughing Jack.
One good place to start looking for such fanfiction is Archive of Our Own (AO3). There are many talented writers who create unique stories in this genre. Just search for 'Fem Harry and Laughing Jack Romance' on the site, and you'll likely find a variety of fics to choose from.
Yes, there are some interesting 'Harry Potter Laughing Jack' fanfictions out there. You can start by looking on fanfiction platforms like Archive of Our Own or FanFiction.net. Just search for the keywords 'Harry Potter Laughing Jack' in their search bars, and you'll likely find a variety of stories with different takes on how these two elements are combined.
Well, a frequent theme is the exploration of morality. Harry Potter is generally associated with good and the fight against evil, while Laughing Jack is more of an ambiguous, often malevolent figure. Fanfictions might play with how Harry and his friends deal with this new, morally grey character. Additionally, the theme of fear and how it affects the characters in the Harry Potter world when confronted with Laughing Jack is quite common. Some fanfictions also touch on the idea of alternate realities, where Laughing Jack's existence changes the course of the Harry Potter story.
Voldemort could still be an antagonist. He might see Harry as an even greater threat now that he has the connection to Laughing Jack. He could be afraid that Harry's new powers will be used against him.
Well, it could be about Harry having some really strange and powerful abilities inherited from Laughing Jack. Maybe he has an even darker side to his magic that he has to struggle with, like being able to create really creepy illusions like Laughing Jack does.
The students at Hogwarts would have a range of reactions. The younger students would be very frightened and might huddle together in the common rooms. Some of the braver Gryffindors, like Neville, would try to stand up to Laughing Jack, even if they were shaking in their boots. The Hufflepuffs would probably try to offer help or kindness, thinking that Laughing Jack might be a misunderstood being. The Ravenclaws would be analyzing every move that Laughing Jack makes, trying to figure out his nature and how to deal with him. And the Slytherins would be divided, some seeing an opportunity to gain power if they could control Laughing Jack, while others would be cautious and stay out of his way.
Another theme is the exploration of their relationship. It could be a love - hate relationship or a deep, unspoken bond. Writers often like to play around with different aspects of how they interact with each other. For example, some fanfictions show them as allies in a spooky world, while others might show them at odds. In addition, the theme of the supernatural is also very prominent. Given their nature, there are often elements of magic, curses, or otherworldly powers in these fanfictions.
Well, it's hard to say if it's common. It depends on how the characters are portrayed in different scenarios. In some fan-created universes, they might be shown as interested in fanfiction as a form of entertainment or to understand how they are perceived by fans. But in the original or more 'canon' interpretations, there's no clear indication that they would typically read fanfiction.
Well, perhaps in this fanfiction, Laughing Jack somehow finds his way into Hogwarts. He starts causing chaos in the school, like making the staircases move erratically or turning the portraits into creepy, distorted versions of themselves. Harry Potter then has to figure out a way to stop Laughing Jack without using dark magic. He might seek help from Dumbledore and use his knowledge of both the wizarding world and his own courage to face this new threat.