Well, perhaps Persephone is cursed by an enemy in her realm. The curse makes her lose her connection to the Underworld and she is sent to the world of Naruto. Naruto, being the kind - hearted hero he is, takes it upon himself to help her. He discovers that the only way to break the curse is to find a special flower that only grows in a dangerous, hidden part of his world. Along the way, they develop a deep friendship and learn from each other's cultures and powers.
One idea could be exploring Persephone's adjustment to the Underworld. For example, she could start a garden in the gloomy realm using her powers over plants, which not only changes the look of the Underworld but also the attitude of its inhabitants. Another plot could be Hades trying to court Persephone in a more modern way, like taking her on a tour of different parts of the Underworld that are beautiful in their own dark way.
Well, you could have a plot where Persephone and Hades have an argument over her time split between the Underworld and the upper world. This could lead to her leaving for a while and Hades having to go through a series of trials to win her back. Another idea is that they discover a new part of the Underworld together that has been locked away for ages and it holds a great power. They must figure out what to do with this power without causing chaos in both their worlds.
Perhaps in the fanfiction, Persephone discovers a long - hidden prophecy that involves Luke. As she tries to figure out how to deal with it, she gets drawn into Luke's world more and more, leading to a series of adventures where they both grow and change. For example, they might have to journey through different mythological places to find clues about the prophecy.
You could write about how Hades and Persephone first met in a different way than the traditional myth. For instance, Persephone could be exploring the Underworld out of curiosity and Hades mistakes her for a lost soul at first. Then as they start to talk, they realize there's a special connection between them. This could lead to a whole new story of how their relationship developed from that unexpected encounter.
One idea could be Percy discovering new powers related to being the son of Persephone. For example, he might be able to control plant growth in unique ways during battles, like making vines entangle his enemies. Another could be his relationship with the Underworld changing. Since Persephone has a connection to the Underworld, Percy might have a special status there and encounter new mythological creatures or challenges.
One idea could be exploring their first meeting from a different perspective. Maybe Hades was initially more hesitant or Persephone was more curious than in the original. Another could be a story where they face a new threat to their relationship, like a jealous god trying to break them apart. A third idea is to write about their daily life in the Underworld, showing how they interact with the various creatures there.
A possible plot could involve Harry being drawn to the Underworld to learn more about his mother. There, he meets various figures from Greek mythology who either help or hinder him. His Hogwarts friends might not understand what he's going through, leading to some tense relationships as he tries to balance his two very different worlds.
One idea could be that Persephone, instead of being kidnapped by Hades in the traditional sense, she actually ventures into the Underworld out of her own curiosity. Hades is initially shocked but then becomes charmed by her boldness. Another plot could be a modern - day retelling where Hades is a powerful businessman in a dark and gloomy part of the city and Persephone is a young artist who stumbles upon his world. A third idea is that there is a curse on Hades that only Persephone's love can break, and they have to go through various trials in the Underworld and on Earth to be together.
One interesting plot idea could be the power struggle between Hades and the other gods due to the stolen sunlight. Maybe the other gods blame Hades for it and he has to prove his innocence while also protecting Persephone.
A possible plot could involve a magical object that has connections to both the Harry Potter world and the realm of Hades and Persephone. For example, a magical flower that can only grow in the underworld but has the power to heal the most deadly of curses in the wizarding world. Harry, along with Persephone and Hades, has to protect this flower from those who would use it for evil.