Well, he might start challenging the Fairy Tail wizards to friendly battles. Since Luffy is all about adventure and getting stronger, he'd see the powerful mages in Fairy Tail as great opponents to test his skills against.
I think Luffy would befriend Lucy first. Lucy is kind - hearted and she has a similar sense of adventure as Luffy. She also has a collection of celestial spirits which would be really interesting for Luffy. He might see her as a valuable ally and friend right away. And with Lucy being one of the more approachable members in Fairy Tail, it's likely that they'd start a conversation and become friends quickly.
One common theme is friendship. Just like in both the original series, fanfictions often explore the strong bonds between characters from One Piece (Luffy's series) and Fairy Tail. They show how characters from different universes can come together and support each other through tough times.
Happy might also become Luffy's friend. Luffy would be amused by Happy's flying ability and his cute appearance. Happy could also help Luffy navigate the Fairy Tail world, as he knows it well. And Luffy might share his food with Happy, which would make Happy very happy indeed.
If Fairy Tail goes to Hogwarts in fanfiction, it would be an interesting clash of cultures. The Fairy Tail guild is very rowdy and family - like. At Hogwarts, there are strict rules. The Fairy Tail members might get into trouble for their unruly behavior. For example, Gray might accidentally freeze part of the Great Hall during a fight with Natsu. And the Hogwarts students would be both shocked and intrigued by the Fairy Tail mages' powerful and flashy magic.
Well, Naruto could bring his unique ninja skills to Fairy Tail. Maybe he'd teach the wizards some cool ninja moves like shadow clone jutsu. He could also form strong bonds with the Fairy Tail members, just like he did with his friends in Konoha. And his determination and never - give - up attitude would surely inspire the Fairy Tail guild.
One idea could be that Luffy joins the Fairy Tail guild and his rubber powers amaze everyone. He might participate in a guild - wide competition and use his unique abilities to win in unexpected ways. For example, stretching to reach far - off targets or bouncing around the arena to dodge attacks.
Well, 'Fairy Tail's New Pirate Member' is also great. In this fanfiction, Luffy joins Fairy Tail for some reason. The author does a good job of integrating the different power systems and cultures from both series. The story has a lot of action scenes where Luffy's Devil Fruit powers are pitted against the magic of Fairy Tail, creating some really cool battles.
Perhaps in this fanfiction, the school they go to is a special school for different guilds. The Fairy Tail group is there to learn about the history and politics of the magical world. They discover secrets about their own guild's past through the school's archives. Natsu accidentally sets off an old magical trap while exploring the restricted section of the library. This leads to a series of events where they have to work together with students from other guilds to fix the mess. Gray and Natsu have to put aside their usual bickering, and Lucy uses her wits to figure out how to reverse the effects of the trap.
Makarov could be a great teacher. He has a wealth of knowledge and experience in magic. He could teach advanced magic techniques and also lessons about leadership and guild values. He would be strict but also very understanding and always ready to give good advice to the students.