Well, family drama is a big one. With Hera and Hades as his parents, there would be a lot of tension. Hera is often seen as a difficult goddess, and Hades has his own dark domain. Percy would have to deal with their different natures. Also, themes of acceptance among the demigods and gods would be common, as his new identity might not be easily accepted.
Sure. A lot of fanfiction writers like to take the idea of Percy being the son of Hera and Hades and run with it. They might create alternate universes where Percy has to navigate the politics of the gods, as both Hera and Hades have their own agendas. This can lead to some really engaging stories.
One idea could be Percy having to mediate between Zeus and Hades during a major feud. Since he's the son of both in this fanfiction, he has a unique connection to them. He could use his powers and his knowledge of both of their domains to try and broker peace.
Annabeth Chase might also be an ally. Her intelligence and strategic thinking could be valuable assets for the son of Hades. She could help him plan his moves, especially when dealing with the complex politics among the demigods and gods.
One possible plot could be Percy discovering his new parentage of being the son of Zeus and Hera. He might struggle with the new identity as it goes against what he previously knew. For example, he could face challenges from the other demigods who are suspicious or jealous of his new status. He then has to prove himself worthy of this new heritage while also dealing with the complex politics among the gods.
One common trope is the outcast status. Since Hera is not the most liked among the gods in the Percy Jackson universe, her son is often made an outcast among the demigods. Another is the special powers. He might have some unique abilities related to Hera's domain, like control over family bonds or something similar.
There could be. The Percy Jackson fandom is quite extensive and diverse. Fanfiction writers often come up with all sorts of scenarios that might not be in the original books. A 'Percy Jackson and Hera Kiss' fanfiction could be part of the many creative interpretations fans have of the relationships between the characters. It might be used to show a different side of Hera's character or to create a really strange and interesting plot point.
Percy's relationship with the other campers at Camp Half - Blood would be a rollercoaster. The children of Poseidon might feel a bit betrayed or confused, as they thought Percy was one of their own. However, Percy could use his new status to bridge gaps between different cabins. For example, he could work with the children of Aphrodite to improve relationships in the camp, since Hera has some connection to love and relationships in a different way than Aphrodite. With the gods, his relationship with Zeus would be extremely strained, given Zeus's past issues with Hera. But he might find new allies among the gods who are friendly with Hera, like Hephaestus. Overall, Percy's relationships would be a mix of challenges and new opportunities.
Obviously, Percy Jackson himself is a main character. He's the one with the new identity as the son of Hades. Nico di Angelo could also be a major character as he has a strong connection to Hades already. And Annabeth Chase would likely be involved too, as she's Percy's close friend and often by his side in adventures. There could also be some new characters created specifically for the fanfiction, like a powerful Underworld spirit that becomes Percy's guide or an enemy within the Hades - influenced areas.
In a fanfiction, Percy as the son of Zeus and Hades could have a very conflicted personality. He would be torn between the light and airy nature of Zeus's domain and the dark and brooding nature of Hades's. This internal struggle could be a major part of his character arc, as he tries to find a balance between the two aspects of his heritage.