They could represent freedom. Wandering implies a lack of ties, and blades are often symbols of power. So in the context of Fairy Tail, the Wandering Blades might be those who are free to use their power as they please, not bound by the normal guild rules.
The 'Wandering Blades' in Fairy Tail fanfiction might also be related to a character's backstory. Perhaps a main character once had an encounter with the 'Wandering Blades' and it changed their life. This could be a way to explore the character's past, their fears, and their growth. It could also introduce new plotlines and conflicts as the character has to deal with the consequences of that encounter.
The condition could be that the main character has to give up their magic for a period of time. This would create a lot of interesting plot twists as they'd have to rely on their wits and the help of their friends in the Fairy Tail guild instead of their magical abilities.
One possibility is that the baby could be a key to a long - forgotten prophecy in the Fairy Tail universe. Maybe it has special powers that the villains in the fanfiction are after, and the Fairy Tail guild has to protect it.
It could be about Natsu having left Fairy Tail for some reason and then reuniting with the guild in a very unexpected way. Maybe he has new powers or a different outlook on life that causes some friction and also some amazing moments of reunion and growth within the guild.
In the Fairy Tail world, Naruto would bring his unique ninja abilities. For example, his shadow clone jutsu could be used in creative ways during battles or to perform tasks. He would likely befriend Natsu because they both have a passion for fighting and protecting their friends. Naruto could also introduce new combat styles to the Fairy Tail guild, which might change the way they approach battles.
Erza would likely have a more serious take on it. If the fanfiction adheres to the values of Fairy Tail and portrays Natsu in a positive light that aligns with his character in the guild, she would probably approve. However, if it contains any inappropriate or un - Fairy Tail - like behavior, she would surely be against it.
Well, one possible plot could be that Goku somehow ends up in the Fairy Tail world. He might initially be confused by the magic there, but then start to learn about it. He could team up with Natsu and the gang to fight against a powerful dark wizard. Goku's strength and his unique fighting skills like the Kamehameha could be a great asset to Fairy Tail in battles.
Tsuna has a lot of potential for magic development in the Fairy Tail fanfiction. Given his background, he could develop a magic that is a fusion of his own powers and the Fairy Tail magic system. His Sky Flame's connection to the sky and air could lead to him developing a magic that controls the weather, like summoning thunderstorms or creating gentle breezes. Also, considering his growth in his own series, he could develop a magic that is related to his emotional state. For example, when he is extremely determined, his magic becomes more powerful, much like how some Fairy Tail mages' power is linked to their emotions. This new magic could be a combination of his Dying Will Flames and the emotional - based magic seen in Fairy Tail.
If Lucy never joined Fairy Tail, the friendships and relationships among the characters would form in a very different way. Also, many of the story arcs might not unfold as they do in the original plot.
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.