The plot could center around Naruto having to prove himself to the King of Hell. He could be sent on a series of dangerous quests in the underworld. Like, he has to retrieve a powerful artifact from a demon that resides there. And along the way, he discovers secrets about his family's past that are somehow related to the King of Hell.
Well, it could be about Naruto gaining the power to control the King of Hell. Maybe he makes a deal with it to save his friends. For example, he might offer his own life force in exchange for bringing Sasuke back from the brink of darkness.
In a 'naruto king of hell fanfiction', Naruto might be summoned to the realm of the King of Hell by mistake. Once there, he finds that the King of Hell is being threatened by a powerful and evil force from another dimension. Naruto, with his never - give - up attitude, decides to help the King of Hell fight off this threat. He uses his ninja skills and newfound powers within the underworld to battle the invaders. During this time, he also forms an unlikely bond with some of the denizens of the underworld who join him in the fight.
One possible plot could be that Harry, after defeating Voldemort, discovers a new and darker threat emerging from the underworld. He is somehow chosen or forced to become the King of Hell to maintain the balance between the magical world and the nether regions. He then has to learn the rules and powers of the underworld while still dealing with his friends and the remaining prejudices in the wizarding world.
In a 'Naruto sent to hell' fanfiction, it could be that Naruto is sent to hell as part of a test. The gods or some powerful entities want to see if he can bring hope and change to the damned souls in hell. So, Naruto starts to teach the souls in hell about friendship, perseverance and the ninja way. He tries to reform the place from within, facing many challenges along the way like powerful hell guards and the dark energy that tries to corrupt him.
Well, in this 'naruto raised in hell fanfiction', it could be that Naruto was sent to Hell by some dark force or accident. There, he might learn some unique and dark jutsu from the environment or the creatures in Hell. And he may use these new powers when he eventually returns to the normal ninja world. He would also have to deal with his own inner demons while in Hell.
One possible plot could be that Naruto discovers a hidden underworld within the ninja world which is known as the 'Hell'. And he becomes like a father figure to the lost souls there. Maybe he uses his own experiences of being an outcast and lonely to empathize with them, and tries to bring some form of order or redemption to this place of chaos.
Perhaps the story is centered around Naruto becoming the 'Lord of Hell'. He might use his newfound power and status to bring about changes in the hellish environment. He could try to reform the system there, like making it more just for the souls trapped, all while using his ninja skills in unexpected ways. For example, using shadow clones to manage different tasks in the vast expanse of hell.
One possibility for an 'agent of hell naruto fanfiction' is that the agent is actually a reincarnation of a former Naruto villain who has been reborn as an agent of hell. This character has all their previous knowledge and now enhanced powers from hell. They start by targeting the Leaf Village first, aiming to destroy it from within. They might use mind - control on some of the villagers or create internal disputes among the ninja clans. The story could then be about how the new generation of ninja, led by Naruto, discovers the truth behind this agent and battles to save their village.
It could be an escaped soul from the King of Hell's domain. This soul might have a grudge against Naruto or the ninja world in general. Maybe it was wrongly imprisoned and now wants revenge by causing chaos in the living world.
One possible plot could be that Naruto is somehow transported to the world of 'One hell of a butler' and has to adapt to being a butler. He might use his ninja skills in unexpected ways while serving the master there. For example, using his shadow clone jutsu to do multiple tasks at once.
One possible plot could be that Naruto accidentally summons the Hell Girl. Maybe he's in a situation where he's desperate to stop an enemy who's causing great harm but the normal ninja ways aren't working. The Hell Girl offers him a deal, but Naruto has to decide if the price is worth it. He could be torn between his ninja values of hard work and self - reliance and the quick fix the Hell Girl offers.
Maybe Naruto goes to hell to rescue a friend or to face some powerful dark forces. For example, he might go to save Sasuke who got trapped there somehow.