I really liked 'Fem Percy: Hades' Legacy'. It delved into her powers as the daughter of Hades. Since she's female, she might use her powers in a different way than the original Percy. She could be more in tune with the underworld's female spirits and use that connection to her advantage in battles and quests.
One great fanfic could be 'The Daughter of Poseidon's Journey'. It follows the female Percy Jackson as she discovers her powers in a new and unique way compared to the original male Percy. She has to face the same old monsters but with her own spin on dealing with them.
One great fanfic could be where the Daughter of Hades has to deal with the stigma of her parentage among the other demigods. She might struggle to fit in, like trying to participate in camp activities while others are a bit wary of her powers related to the Underworld.
You can start by giving her a distinct personality. Maybe she's shy because she's always been feared for her father's sake. Then, gradually show her growing confidence as she discovers her own strengths. For example, if she has the power to raise small skeletons as minions, at first she's scared of it, but later she learns to use it for good. Also, explore her relationships with other characters. Her friendship with Percy could be based on mutual understanding of being different among the demigods.
Well, there's a fanfiction where Percy as a child of Hades discovers new abilities. It delves into how he uses his powers of the Underworld, like shadow - traveling in unique ways. The story could also show how he struggles with the stigma of being Hades' son among the other demigods at Camp Half - Blood. And then there's a fic that focuses on Percy's adventures in the Underworld itself, as a child of Hades he has certain privileges and responsibilities there.
One great fanfiction you could check out is 'The New Quest' where female Percy and male Annabeth have to face an ancient evil that has resurfaced. It has some really interesting character dynamics as they navigate their relationship in a different gender setting.
One great fanfic is 'The Female Percy in Young Justice's World'. It combines the elements of Percy Jackson's powers and the Young Justice universe really well. The female Percy is a strong character, facing challenges from both the demigod world and the superhero world in the story.
There's a fanfic where Percy becomes a gunslinger to fight against an ancient evil that has invaded the Wild West in the Percy Jackson universe. It's filled with action-packed scenes and some really cool interpretations of how Percy's demigod abilities work in this new context. It's quite exciting to read.
One great Percy Jackson musician fanfiction is 'The Melodic Demigod'. It's about Percy discovering he has a hidden talent for music and how it intertwines with his demigod life. The story has some really cool scenes where he uses music to soothe mythical creatures.
There's also 'Shinto Gods and Demigods'. This fanfic delves deep into how the Shinto deities would interact with the demigods from Percy Jackson. It's really interesting as it shows the cultural clashes and the new alliances that form. For example, some of the Shinto gods might help Percy in his fight against the Titans in ways that are unique to their powers.
There's 'Bisexual Percy: His Hidden Side'. This one focuses more on Percy's internal struggle. It's written in a way that makes you feel like you're right there with him. The author does a good job of showing how Percy's bisexuality is a part of him that he's been suppressing due to the expectations around him in the demigod world.