Maybe there's a powerful artifact in the Fairy Tail world that, when Naruto comes into contact with it, makes him emotionless. The Fairy Tail guild decides to help Naruto because they sense his inner strength. As they journey together, the Fairy Tail characters start to learn from Naruto's ninja way despite his emotionless state, and Naruto in turn starts to be influenced by the warmth and camaraderie of the Fairy Tail guild. Eventually, they find a way to break the spell on Naruto, and he returns to his normal self with a newfound understanding of both worlds.
One possible plot could be that Naruto is transported to the Fairy Tail world and is somehow stripped of his emotions during the process. The Fairy Tail wizards then have to figure out how to send him back while also trying to restore his emotions. Along the way, Naruto's lack of emotion might cause him to make some uncharacteristic decisions that put everyone in danger.
One possibility could be that a main character, perhaps Natsu, is somehow reborn without emotions. He would then go through the world of Fairy Tail in a very different way. For example, he might not be as eager to fight for his friends because he doesn't feel the passion or loyalty he once did. This could lead to a lot of conflict within the guild as they try to figure out how to bring back the old Natsu.
It could work by making Naruto a more mysterious and brooding character. In Fairy Tail, there are many characters with different personalities. An emotionless Naruto would stand out. He might be more focused on achieving his goals without being distracted by emotions. For example, he could be on a mission to find a way back to his own world and his lack of emotion helps him stay determined.
It might be that in this fanfiction, the writer wants to explore a different side of Naruto. By making him emotionless, they can create unique interactions with the Fairy Tail characters. For example, his lack of emotion could contrast sharply with Natsu's fiery personality, leading to interesting story developments.
His role could be that of a teacher. Since he doesn't have emotions clouding his judgment, he could teach the Fairy Tail members about self - control and the importance of thinking rationally. He could show them how to use their magic more effectively without being carried away by emotions like anger or pride. He might also introduce them to some ninja techniques that are based on discipline rather than raw emotion.
An interesting plot could involve the White Dragon being captured by a group of rogue ninjas and dark mages. They want to use the White Dragon's power to create a new, chaotic world order. Naruto and the Fairy Tail guild then launch a rescue mission. Along the way, they discover new abilities and form new friendships. The White Dragon, once rescued, could also play a crucial role in the final battle against the combined forces of the rogues.
One possible plot could be that Naruto is somehow transported to a world where Saiyan powers and Fairy Tail magic exist. He might start off as an outcast, not understanding these new powers at first. But as he trains and learns, he combines his ninja skills with Saiyan strength and Fairy Tail magic to become a powerful force and fight against an evil that threatens all three aspects of this new combined world.
Well, perhaps in this fanfiction, Fairy Tail characters bully Naruto because they are jealous of the attention he gets from certain characters in their shared universe. They start by making fun of his appearance, like his orange jumpsuit, and then escalate to more mean - spirited pranks, like using their magic to disrupt his ninja training.
Well, it could be that in this fanfic, Naruto is somehow transported to the Fairy Tail universe. And due to his different power set and origin, the Fairy Tail members misunderstand him and think he's a threat. Maybe they see his shadow clone jutsu as some sort of dark magic and turn against him.
Well, perhaps in this fanfiction, Naruto is banished due to a false accusation in his world. He lands in the Fairy Tail world and is seen as an outsider. However, his determination and strong will attract the attention of some of the Fairy Tail members. Erza, for example, might see his potential and take him under her wing, training him in the ways of the Fairy Tail magic while he also teaches her some ninja tricks.
The plot could involve Naruto and Tayuya being mistaken for powerful mages in the Fairy Tail world. Since Naruto has such strong combat abilities and Tayuya has her unique skills. They get dragged into a guild - centered conflict. For example, there could be a rival guild trying to steal a powerful magic item that Naruto and Tayuya are somehow guarding or are associated with. They then have to use their combined skills, Naruto's ninjutsu and Tayuya's jutsu, along with the help of Fairy Tail mages like Natsu or Lucy to fend off the attackers.