There could be. The world of fanfiction is vast and full of creative and sometimes out - of - the - box ideas. Given the popularity of both the Harry Potter series and the concept of Hades from Greek mythology, it's not far - fetched to think that someone has written a fanfic exploring the idea of Harry being Hades' son. This could lead to all sorts of new plotlines, like how Harry's powers might be different or how his relationships with other characters would be altered.
I really like 'The Meeting of Seasons'. In this fanfic, the interaction between Persephone and Hades is so well - written. It focuses on how their different natures - her being associated with spring and life, and him with the underworld and death - actually complement each other. It's a shorter fanfic but manages to pack in a lot of emotion and character development.
Another theme is the duality of the underworld and the overworld. Fanfics often play with the idea of Persephone being a bridge between these two realms, and how her relationship with Hades affects both the light and dark aspects of the world.
Well, in House of Hades fanfic, the characters can vary a great deal. Some fanfics might focus on Percy and Annabeth's relationship, making them even more heroic and in - love than in the original. Others could explore Nico's character more deeply, showing his internal struggles with his powers and his identity. The villains might also be given more backstory or different motives, which can add a whole new layer to the story.
The King of Hell's wife's ending was An Ziyue's death, but a sliver of her soul remained. The King of Hell's brother, the Celestial Thearch, was also dead. Hua Qianxue had become the new Heavenly Emperor, and the mysterious old patriarch of the Phoenix Clan had died. The female lead and Yan 'er died together, but the female lead used the divine artifact in Yan' er's body to resurrect. The female lead and male lead lived happily together and even gave birth to three children.
Well, one unique aspect is the exploration of Hades' character. In the official Percy Jackson books, Hades is often seen as a villain, but in fanfic, he can be more nuanced. For example, some fanfics show his love for his family and his reasons for his actions.
To develop Poseidon's character, focus on his connection to the sea. Describe how his moods are like the changing tides. For example, when he's angry, the seas rage. Show his pride in ruling the oceans. For Hades, emphasize his loneliness in the underworld. Maybe he has a longing for something more than just ruling the dead, like a connection to the living world which he can't fully have.
One common theme is the power of love. Their relationship defies the norms of the Greek pantheon, and the fanfics often explore how their love overcomes all odds. Another theme is the duality of Persephone. She has a life in both the mortal world (on earth) and the underworld, and this is often explored in how it impacts her relationship with Hades.
A common theme is character development. Fans often explore the growth of the characters from the original book in their fanfics. For example, how Percy and Annabeth's relationship evolves further.