In this fanfiction, the plot could be that Harry Potter, being raised by Tartarus, has a completely different upbringing. Tartarus is often associated with the underworld in mythology. So, he might be exposed to a lot of dark magic and have to fight his way out of a world full of demons and evil forces. He may not have the same moral compass as the original Harry, as he's been influenced by this dark place.
Well, it might involve Harry Potter growing up in a really dark and dangerous environment like Tartarus. Maybe he'd learn some very different magic or survival skills compared to what he learned in Hogwarts. He could also face different kinds of enemies, perhaps more menacing and otherworldly ones.
Obviously, Harry Potter himself. And there could be some dark creatures or entities from Tartarus that act as his guardians or mentors in this strange upbringing. Maybe some sort of dark wizard who has made Tartarus his lair and takes Harry under his wing.
I'm not sure specifically as there could be many different interpretations in this fanfiction. It might be about Harry Potter having some sort of connection to Tartarus, perhaps a new origin story where Tartarus plays a role in his birth or his powers. Maybe it involves Harry facing challenges related to this new identity within the magical world.
The plot could involve a situation where a new form of dark magic is unleashed in the wizarding world, which spreads like wildfire and causes destruction similar to 911. The Ministry of Magic is caught off - guard. Hermione, with her vast knowledge, starts researching a way to counter this magic. Meanwhile, Ron and Harry lead the effort to protect the civilians. They set up shelters in places like the Room of Requirement and use Patronuses to guide people to safety. As they dig deeper, they discover that this dark magic was a planned attack by a long - hidden dark wizard group who wants to take over the wizarding world.
Well, it could be that Naruto, under Hiruko's influence, might develop a very different set of skills. Maybe he'd be more attuned to darker jutsus. He could also have a more cynical view of the ninja world.
Well, one possibility could be Percy facing his inner demons. In Tartarus alone, he might have to deal with the memories of his past failures and the fear that comes with being in such a desolate place. He could encounter strange and terrifying creatures that test his combat skills and his will to survive.
One possible plot could be Percy and Zoe facing numerous dangerous monsters in Tartarus. They might have to rely on each other's unique abilities. For example, Percy's control over water could help them cross certain deadly rivers while Zoe's hunting skills could be used to fend off the approaching beasts.
One possibility could be Percy's struggle to survive the harsh conditions. He might have to find new ways to use his powers in Tartarus. For example, the strange and dark magic there could either enhance or limit his abilities. He could also form alliances with unexpected creatures. Maybe he teams up with some of the ancient and terrifying monsters that live there, but they have a common enemy, so they work together for a time.
Obviously, Harry Potter would be one of the main characters. Since it's about him being the son of Tartarus. And probably his friends like Hermione and Ron would also be important characters as they are in the original series. They might react differently to Harry's new identity.
One possible plot could be that Harry discovers a hidden magical dance form within Hogwarts. He starts learning it secretly and realizes it gives him new powers or a deeper understanding of magic.