One idea could be that Harry discovers his demigod powers in a world where Bella is his caretaker. Maybe he has powers related to fire, and Bella has to help him control it so he doesn't accidentally set things on fire. For example, they could live in a small village where Harry's outbursts start to draw unwanted attention.
In this fanfiction, perhaps Harry's demigod status is a secret that Bella is trying to protect. She could be teaching him how to blend in with normal humans while also guiding him in understanding his divine heritage. Bella might introduce him to a local library where he can study about ancient gods and goddesses to learn more about himself.
The plot could involve Harry growing up with Bella and slowly realizing he's different. For instance, he might be stronger and faster than the other kids in their neighborhood. As he gets older, strange things start to happen around him, like plants growing abnormally fast when he's angry. Bella then decides it's time to tell him about his demigod nature.
Well, in 'harry is a demigod fanfiction', the idea of Harry's new identity as a demigod might bring about a whole new set of challenges. He might have to face demigod - specific enemies that are different from the dark wizards he's used to. Also, the way his friends in the wizarding world react to his new status could be really interesting. Some might be in awe, while others might be a bit jealous or even scared.
One interesting concept could be the combination of magic from the Harry Potter world and the powers of demigods. For example, a character might use a wand to cast spells while also having the inborn strength or special ability of a demigod. Another concept could be the interaction between Hogwarts and a demigod - like camp. How would the rules and cultures of these two very different magical settings collide or coexist? Also, the idea of a demigod attending Hogwarts and having to hide their true nature from the other students and teachers can lead to some really exciting plot twists.
The plot could revolve around Harry's struggle to fit in. Since he is a demigod raised by Bellatrix, he is likely to be an outcast in both the wizarding and demigod communities. The wizarding world may not understand his demigod powers and the demigod world may not accept him because of his connection to Bellatrix. He might have to go on a journey to find others like him or to find a place where he truly belongs. Along the way, he could face many challenges and enemies, both magical and perhaps related to his demigod status.
Perhaps a plot where Harry discovers he is a demigod and has to navigate the wizarding world while also dealing with the challenges that come with being a demigod. He might have to face new enemies that are interested in his dual nature.
One interesting idea could be a magical duel between a Harry Potter character and a Greek demigod. The different powers they possess would make for an exciting showdown.
One interesting concept could be the moral and ethical dilemmas Harry would face. Growing up with Voldemort as his guardian, he might be torn between the dark teachings and his own inner sense of good. Another could be his relationships with the other Death Eaters. He might form strange alliances or rivalries within that dark circle.
Well, in such a fanfiction, perhaps the Famels introduce Harry to a whole new world within the wizarding world that we haven't seen in the original series. It could be a place with different magical creatures and spells that shape Harry in a new way. For example, they might teach him a more ancient form of magic that gives him an edge over his foes in Hogwarts.
One interesting concept could be how Harry's character might develop differently. If he's raised by a 'predator' in the fanfiction sense, perhaps he'd be more cunning or have a different moral compass. For example, he might learn survival skills in a harsher way than in the original series.
The world - building in 'Harry Potter Raised by Devils' fanfiction can be really fascinating. The setting could be a darker Hogwarts, with devilish influences everywhere. The rules of the school might be twisted. For instance, instead of the houses promoting unity and friendly competition, they could be more about power struggles among different devil - influenced groups. Also, the role of the teachers would be different. Some might be in league with the devils, and Harry would have to navigate this treacherous environment.