One idea could be to have Naruto characters embody the seven mortal sins in unique ways. For example, Naruto might struggle with gluttony in the sense of his insatiable desire for ramen, but it could be a metaphor for his larger appetite for life and friendship. Another could be to explore how Sasuke might represent pride, with his unwavering belief in his own abilities and his need to prove himself above all others. And Hinata could represent envy in her early days, envying the confidence and strength of others while she was so shy.
Another plot could involve fem Naruto being accused of the sin of envy. In the Seven Deadly Sins' setting, she could envy the powers or status of certain characters. She might see how powerful Meliodas is, for instance, and envy his leadership and strength, which could lead to her making some unwise decisions in an attempt to prove herself equal or better.
One idea could be an OC who is a hybrid of two of the deadly sins, like pride and envy. This OC could struggle with the internal conflict of these two powerful emotions. For example, being envious of the power of other characters while also being too proud to admit it or ask for help. Another plot could be an OC who is on a quest to redeem the Seven Deadly Sins themselves, believing that they can be reformed. This would involve the OC facing many challenges and having to understand the true nature of each sin.
Well, Naruto could be used to represent gluttony in a positive way, as mentioned before with his love for ramen. For envy, Tenten might be a good choice. She often seems envious of the more powerful and unique weapons of other ninja. And for sloth, Ebisu could be a character to represent it, with his laid - back attitude and sometimes lackadaisical approach to his duties as a ninja instructor. As for the other sins, there are many other characters like Gaara who could be molded to represent pride in his new - found self - worth after befriending Naruto and the others.
Well, a frequent theme is the exploration of morality. Naruto is a character who generally adheres to a strict moral code. In fanfictions with the Seven Mortal Sins, it often delves into how his code would hold up or be challenged by the presence of the Sins. Also, there is often a theme of adaptation. How would Naruto characters adapt to the new rules and situations in the world of the Seven Mortal Sins? This is something that is commonly explored in such fanfictions.
One interesting plot idea could be that in the Minecraft world, the characters from Seven Deadly Sins are transported there. For example, Meliodas could be on a quest to find a special diamond that has the power to restore his lost strength. And the Minecraft mobs could be influenced by the sins. The zombies could be more aggressive due to wrath, and the pigs could be gluttonous and overeat the crops in the game.
A plot could involve Kirito being cursed by a powerful enemy related to the Seven Deadly Sins' lore. The curse affects his ability to log out or communicate with his own world. In order to break the curse, he has to help the Seven Deadly Sins complete a series of dangerous quests. Along the way, he forms deep bonds with each of the sins and learns about their pasts and how they are dealing with their own 'sins'.
A plot could be that Escanor and Merlin are tasked with training a new generation of knights. They have different teaching styles, with Escanor focusing on physical and mental fortitude, and Merlin on magical abilities. This leads to some humorous and also some tense moments as they try to work together.
Another possibility is a story in which the power system of the Seven Deadly Sins is introduced into the Naruto world. Naruto and his friends could gain new abilities based on the virtues that oppose the seven sins. For instance, Sasuke might learn a power related to humility (opposing pride) which helps him in his journey of redemption. This would not only mix the two universes but also offer new character development arcs for the Naruto characters.
Maybe a plot where Merlin discovers a prophecy that only Escanor can fulfill, but it requires him to sacrifice something dear to him. They embark on a journey to find a way around the sacrifice while also falling in love along the way. There could be many challenges like facing ancient guardians and deciphering cryptic riddles.
One common theme is the clash of different power systems. Naruto has his chakra - based ninjutsu and the characters in The Seven Mortal Sins have their own unique powers. Another theme is friendship. Just like in Naruto where friendship is highly valued, in these crossovers, Naruto forms new friendships with the characters from The Seven Mortal Sins.