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.
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.
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.
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.
Luffy's character would likely become more mature. He'd learn discipline from Whitebeard's strict training regime. His view of the pirate world might expand as he gets insights from Whitebeard's long - standing experience.
Luffy being raised by Doflamingo would be a radical departure from his normal upbringing. Doflamingo's way of life, which involves a lot of underhanded tactics and a disregard for the well - being of others, would shape Luffy in a very different way. He may not have the same innocent and carefree attitude. His goals could be more self - centered, like taking over territories or amassing power for the sake of it. His relationships would also be different. Instead of forming deep bonds of friendship, he might form alliances based on power and convenience. And his approach to challenges would be more in line with Doflamingo's cut - throat style, rather than his own original tenacious but more morally - guided approach.
She could be a former pirate captain herself. Maybe she was one of the most feared pirates in her time, and her skills and reputation were passed down to Luffy in some way, even if he didn't know it was from his mother.
There could be an original character created just for the fanfiction. A woman with a kind heart but a tough exterior, who was a great fighter. She could have met Luffy's father during a battle and they fell in love, and she became Luffy's mother.
Nami could also be a common character. She might help Luffy manage the financial aspects of his admiral duties, as well as use her navigation skills to assist in any navy - related voyages. And of course, she'd be there to keep Luffy in check when he gets too carried away.