Well, a cool plotline might be a story where the main character forms an unexpected alliance with the Demon of the Mist. They could team up to fight against a greater evil that threatens both the Mist Village and the ninja world at large. It could also involve the discovery of hidden powers within the demon that could change the balance of power in the Naruto universe.
One interesting plotline could be the exploration of the Demon of the Mist's backstory. Maybe it reveals how the demon came to be associated with the Mist Village in the first place. Another could be a story where a character has to face the inner demons inspired by the Demon of the Mist and overcome them through self - discovery and growth.
In some 'Naruto Demon of the Mist fanfiction', there could be a plotline where the Demon of the Mist is actually a misunderstood entity. The story could focus on a young ninja's journey to understand the demon, and in the process, they learn that the demon was once a victim of some dark magic or ancient curse. This understanding then leads to a new way of dealing with the demon, not as an enemy to be destroyed, but as a being that can be redeemed.
One interesting plotline could be the exploration of the unique culture and history of the Mist Village within the fanfic. Maybe it delves into the training methods of Mist ninjas that are different from other villages.
Another plotline could involve how Naruto's relationships change. For example, his friendship with Sasuke might be affected as Sasuke could be either more wary or more intrigued by Naruto's new 'demon' aspect. His relationship with his teachers like Kakashi might also shift as they try to help him manage this new power.
Maybe a plot where Naruto, through some magical accident, gets transported to a world full of demonesses who all see him as a potential mate. He then has to use his ninja skills and his kind heart to navigate this new world and the complex relationships within the harem. For example, he might have to fight in some demon battles to prove his worthiness to be in the harem.
One interesting plotline could be Naruto struggling to control his new wolf demon powers. He might accidentally lash out at his friends, creating a rift between them until he learns to master his abilities.
One possible plotline could be Naruto's inner struggle with his new 'demon' side while still maintaining his love for Hinata. Maybe his demon powers make him more protective of her in a way that's different from his normal self.
Perhaps a plot where the mist flames are a portal to an alternate dimension that follows a different path in the wizarding world. Harry Potter could get trapped there and has to find his way back while dealing with different versions of his friends and enemies. In this 'harry potter mist flames fanfiction', the alternate dimension might have different magic rules that he has to adapt to quickly.
One interesting concept could be the unique interpretations of the Mist Village's culture. For example, how their ninja training might be different from other villages. Maybe they have more emphasis on stealth in water or unique weaponry.
One possible plotline could be the main character's struggle to control the new demonic powers while still maintaining their sense of self. For example, they might have to deal with sudden outbursts of power that attract unwanted attention in the Naruto world. Another plotline could involve the character's relationships changing. Their friends might be scared or suspicious of them at first, but over time come to accept and even rely on their new powers.
Another plotline might involve Naruto being ostracized by some in the village due to his half - demon nature. This could lead to him having to prove himself not only as a ninja but also as someone worthy of acceptance, despite his different heritage. He could form unexpected alliances with those who also feel like outcasts.
There could be a fanfiction where the secrets of the Bloody Mist's past are slowly revealed through the eyes of a new generation of ninja. Maybe it focuses on a character who has to deal with the dark legacy of the village while also facing external threats. They could befriend Naruto and his friends, leading to a story of friendship and redemption in the context of the Bloody Mist's brutality.