One great fem Harry and Hades fanfiction is 'Underworld's Rose'. In this story, fem Harry has a unique encounter with Hades in the underworld. The author does a wonderful job of portraying the relationship between them, with a touch of mystery and a lot of character development.
One common theme is identity struggle. Since she's the daughter of Hades, she has to figure out where she belongs in both the wizarding world and the realm of the gods. Another theme is power and its control. Her powers from Hades are often very different from typical wizarding magic.
She could be a protector. In a fem Harry as Hades' mate scenario, she would likely be a powerful figure in the underworld. She could use her skills and powers to protect Hades' realm from external threats. Maybe there are other dark forces from different mythologies or from the wizarding world that want to take over the underworld, and she would be at the forefront of defending it, while also being Hades' partner and support.
The contrast between their worlds. Harry comes from the wizarding world full of magic wands and spells, while Hades rules the underworld. When they meet in fanfiction, it creates a whole new dynamic. It's like mixing two different types of magic.
One popular trope is the 'fish out of water' scenario. A fem Harry Potter in the realm of Hades would be quite out of place. She'd have to adapt to the dark and often unforgiving world of Hades. Another is the 'powerful outsider' trope. Given Harry's magical abilities, she'd be a force to be reckoned with in Hades' domain. And the 'romantic entanglement' trope is also common, perhaps a relationship between fem Harry and Hades or one of his minions, adding a layer of drama and passion to the story.
Perhaps it begins with a misunderstanding. Fem Harry could be mistaken for someone else in Hades' realm. Hades, being a powerful and somewhat solitary figure, might be initially hostile. But as he discovers her true identity and her own unique story, his attitude changes. Their relationship could develop as they both realize they have common enemies or goals. For example, they might both be fighting against a greater evil that threatens both the wizarding world and the underworld. This shared purpose could bring them closer together, and eventually, they could become mates.
One possibility could be that Fem Harry Potter brings her unique magic skills to the underworld. She might use her Gryffindor - like courage to face the various challenges in Hades' realm. For example, she could help in maintaining order among the souls. Also, her experience in fighting dark wizards in the wizarding world might be applied to dealing with any potential threats in the underworld.
Hermione could be a popular character. In some fanfictions, she might accompany Harry to the Underworld and use her vast knowledge to help them solve problems. For example, she could be the one to decipher ancient Underworld texts that hold the key to their mission.
Her magic might become darker. Since she is in the realm of Hades, associated with death and the afterlife, her spells could take on a more somber tone. For example, her Patronus, which is usually a positive form of magic, could transform into something more related to the underworld, like a spectral dog with a smoky appearance.
In some fanfictions, Hades might be portrayed as a more complex character than in the original works. He could be shown with hidden depths of emotion. Fem Percy, on the other hand, might have the same勇敢 (bravery) as the male Percy but with a different, perhaps more feminine, approach to challenges. For example, she could use her wits in a more nuanced way, similar to how female characters in other adventure stories might. Their interactions could range from being adversarial, as Hades is often a somewhat antagonist figure, to having an unexpected alliance based on mutual goals or understanding.