Well, Sasuke from Naruto could be a really strong competitor. His Sharingan gives him enhanced perception and the ability to copy his opponents' moves, which would be useful in the Grand Magic Games. In Fairy Tail, Gildarts is extremely powerful. His Crash magic is so strong that he can destroy almost anything. He has a lot of experience and his magic power is off the charts. Also, Gray from Fairy Tail with his Ice - Make magic can create various ice structures for offense and defense, and he's a tough fighter, so he'd be a strong contender too.
In Naruto, Naruto himself would be a strong contender. His vast chakra reserves and his ability to use multiple powerful jutsus like the Rasengan and the Sage Mode would give him an edge. From Fairy Tail, Erza would be a top contender. With her Re - Equip magic, she can quickly change into different armors with various abilities, making her very adaptable in different challenges.
In this fanfiction, perhaps the Grand Magic Games are altered due to the presence of Naruto characters. For example, there could be new events that test both ninja skills and magic. Sasuke could use his Sharingan to counter some of the illusions created by Fairy Tail mages. And characters like Erza would be intrigued by the different fighting styles of the Naruto universe, leading to some epic battles and exchanges of techniques.
Well, one way it could work is by having characters from both Naruto and Fairy Tail participate in a Grand Magic Games - style tournament. The Naruto characters could use their ninja skills, like jutsus, while the Fairy Tail mages use their magic. They'd have to compete in various challenges that test both physical and magical abilities.
They would bring new powers. Naruto's Rasengan could be a very powerful attack in the games. It could be compared to some of the big - hitting magic spells in Fairy Tail.
One idea could be Natsu getting a new, powerful form during the Grand Magic Games. This form could be a result of some ancient magic he discovers. He then uses this form to defeat a really tough opponent and surprises everyone, including his guildmates.
Happy could be an unexpected hero. Usually seen as a sidekick, in a fanfiction, he could suddenly discover a new form of magic. Maybe he unlocks a powerful transformation that gives him the ability to take on powerful opponents. He could use his speed and newfound strength to turn the tide in the games.
In this kind of fanfiction, the relationships within the guild could deepen in different ways. Since there's no Grand Magic Games, the members would have more time to interact on a daily basis. This could lead to new romances blooming. For instance, Erza might have more time to get to know Jellal on a personal level without the distractions of the games. Also, the younger members could form stronger bonds with the older, more experienced ones as they would be around each other more often.
They would interact in very interesting ways. Naruto might be curious about the magic of Fairy Tail and try to learn some spells. The Fairy Tail characters, on the other hand, would be amazed by Naruto's ninja abilities. For example, Gray might be interested in Naruto's ability to walk on walls.
One idea could be to create an alternate version where a new, mysterious guild enters the Grand Magic Games. This guild could have unique magic that no one has seen before, which would add an element of surprise and intrigue. For example, they might have magic related to time manipulation, allowing them to rewind or fast - forward events during the games.
A fanfic of this nature would likely explore the cultural differences between the two universes as well. The Grand Magic Games are not just about battles but also about representing one's guild. Naruto, coming from a ninja village, would have to understand the concept of a guild. He might bring in his own sense of loyalty and teamwork from the ninja world. And the Fairy Tail members would be intrigued by his strange powers. There could be humorous moments as they try to figure out how his jutsu works compared to their magic. And in the battles, the clash of Naruto's chakra - based attacks and the Fairy Tail mages' elemental magic would make for some really intense and visually stunning scenes.
Natsu is definitely one of the key characters. His strength and determination are always crucial for Fairy Tail. He's likely to be in the thick of the action, taking on tough opponents head - on.