Well, his role could be that of a mentor. Zoro has a lot of combat experience. He could teach the younger members of Fairy Tail some new fighting techniques. He might also be a bit of an outsider at first, not really understanding all the magic stuff, but then he'd gradually adapt and start to incorporate magic - like sword - based magic perhaps - into his fighting style.
Zoro's serious and determined personality would contrast with some of the more laid - back members of Fairy Tail. But it could also be a good influence. He would keep everyone focused during tough times.
If Naruto joined Fairy Tail, his powers would likely be a very interesting addition. His chakra-based abilities like the Rasengan could be a unique form of magic in the Fairy Tail universe. He might have to learn to control his chakra in a new way to fit with the magical rules there. Maybe he could combine his shadow clone jutsu with some Fairy Tail magic for some really cool combat moves.
Well, Goku's powers are mainly based on ki manipulation, which is somewhat similar to magic in the Fairy Tail world. If he joins Fairy Tail, he could probably learn to combine his ki with the magic of Fairy Tail. For example, he might be able to infuse his ki into Natsu's fire magic to make it even more powerful. Also, his teleportation technique, like Instant Transmission, could be a great asset during battles and rescue missions in the Fairy Tail universe.
Kakashi's ability to manipulate chakra could be seen as a form of magic in the Fairy Tail world. His Sharingan could potentially unlock new forms of magic or enhance existing ones. For example, if he were to team up with Erza, his Sharingan could help her analyze her opponents' defenses better, allowing her to break through them more easily. His teleportation techniques could also be used to quickly move around the battlefield, something that would be very useful in large - scale battles against powerful dark guilds.
Ichigo's powers would adapt by evolving through new challenges. In Fairy Tail, he'd face different kinds of enemies compared to Bleach. His ability to sense spiritual pressure might be tweaked to sense magic power instead. His Hollow powers, which are often seen as a dark side in Bleach, could be seen as a powerful and somewhat unruly form of magic in Fairy Tail. He would need to learn to control it better in the new environment.
Well, Gaara's sand - based powers could be really unique in the Fairy Tail universe. His ability to control sand could be seen as a new type of magic. Maybe he could use it in combination with Fairy Tail's team - based combat. For example, he could create sand barriers to protect his teammates during battles, just like he did in his own world to protect his village.
If Naruto joined Fairy Tail in a fanfiction, he'd probably make some really interesting friends. He has that determined and kind - hearted nature that would fit right in with the Fairy Tail crew. He might even teach some of the Fairy Tail mages his ninja techniques, and in return, learn about magic from them. It could lead to some epic team - up battles where his ninja abilities and Fairy Tail magic are combined to defeat powerful foes.
Well, he would probably bring his unique determination and growth mindset. Izuku is used to facing challenges and working hard to overcome them in his own world. In Fairy Tail, he could learn new magic and team up with the guild members for various quests. His never - give - up attitude would likely inspire the other wizards in Fairy Tail.
Well, it could be chaos. Zeref's dark powers would likely disrupt the harmony of Fairy Tail at first. His presence might cause a lot of suspicion and fear among the guild members.
Well, in such a fanfiction scenario where Shirou joins Fairy Tail, he'd be exposed to a whole new world of magic. Shirou's used to his own kind of battles, but in Fairy Tail, magic is the norm. He could learn about different types of magic from the other guild members. His own skills could be seen as something quite special in this magical guild. He might also get into some friendly rivalries with the more combat - oriented members, which would be fun to read about.