Well, in general, fanfiction about an adopted and abused Hermione is a rather dark concept. Ethically, it's a gray area. On one hand, fanfiction allows for creative exploration, but this theme might be disturbing to many. It could be seen as unethical if it promotes or glorifies abuse in any way.
Poseidon might be presented as a rather powerless god in the context of Percy being abused in fanfic. Despite being Percy's father, he could be constrained by the will of Zeus and other gods, which prevents him from acting decisively to save Percy. Hades, however, might be a more interesting character. He may have his own motives for helping Percy. He could see Percy as a useful tool against the other Olympians or simply as a victim who he can relate to, given his own outcast status among the gods. So, in fanfic, he might play a key role in Percy's journey to overcome the abuse.
Poseidon could play a regretful father. He may realize too late how much Percy has suffered and then try to make amends. For instance, he might secretly send gifts or powers to Percy to help him defend himself. Hades could be a secret mentor. He has a lot of knowledge about the dark side of the world and magic that could help Percy understand his situation better and find ways to fight back against his abusers.
First, be aware of the sensitive nature of the topic. Don't make the abuse gratuitous. If you must write about it, focus on Hermione's character growth and how she overcomes the situation. Also, provide trigger warnings at the beginning so that readers know what they're getting into.
One Direction being in adopted and abused fanfiction is not a good thing. Firstly, it's unethical as it takes advantage of the popularity of the band to create disturbing content. Secondly, it can have a bad impact on the younger fans. They might get confused or scared by these stories that involve such heavy and inappropriate themes. It also shows a lack of respect for the real personalities of the band members.
One common theme is redemption. Harry often has to overcome his past abuse and find a new path in life with his adopted family. It's about rising above the pain and becoming a better person.
One common theme is Hermione's struggle to trust again after being abused. Since she has a difficult past, she may find it hard to open up to her new family or friends in the fanfiction. Another theme could be her journey of self - discovery. She might learn more about her own strength and resilience through the experience of being adopted and dealing with her past abuse.
One popular 'Abused Harry is Adopted' fan fiction could be 'A New Beginning for Harry'. In this fic, Harry is adopted by a kind wizarding family who helps him heal from his past abuse and discover his true potential. Another one might be 'Harry's Redemption', where his new adopted family guides him through a journey of self - discovery and magic training. There are also fics like 'The Adopted Potter' which focus on how Harry's life changes drastically for the better after being adopted.
Well, a typical theme is redemption. It could be about the abuser getting what they deserve or the child finding a way to forgive (not always though). Then there's the theme of growth. The abused child grows in confidence, learns new skills, and becomes a more well - rounded person in the care of their new family. And of course, the theme of family - how this new, adoptive family becomes a real family, with all the love, fights, and togetherness that comes with it.
One popular 'abused and adopted Harry Potter fanfiction' is 'A Different Sort of Magic'. In this story, Harry is taken in by an unexpected family after being abused at the Dursleys. It shows his journey of healing and discovery in a new environment.