Naruto would likely change the guild's training regime. He'd focus on building physical strength as well as magical power. Since he's used to intense training himself, he'd push the members to be better. He might also introduce a system where members help each other more directly, like his team - based approach in Naruto.
As the guild master, Naruto would probably make the guild more open to outsiders. In the Naruto world, he was always open to making new friends and allies. So in Fairy Tail, he'd welcome new wizards more easily. He could also introduce some new forms of magic based on his own abilities. For example, he could create a 'Chakra Magic' that combines the principles of chakra with the existing magic in Fairy Tail. This would diversify the guild's magic capabilities.
Well, Naruto is known for his strong leadership skills and determination. If he were the guild master of Fairy Tail, he would probably bring a whole new energy to the guild. He'd likely encourage members to train harder and push their limits, just like he did with his own friends in Konoha. Also, his unique ninja abilities could inspire new types of magic in the Fairy Tail world.
Another great choice could be Laxus. He has that tough - guy exterior but also a lot of room for character growth. In a fanfiction as guild master, he could bring a different leadership style, more aggressive perhaps. He might change some of the guild's traditions while still maintaining the core values of Fairy Tail. He also has a great relationship with his team, which could be further developed in the fanfiction.
A plot could be about a new guild master having to deal with a powerful dark guild threat. The new guild master, say someone like a new character introduced in the fanfiction, has to unite the Fairy Tail members, who are initially skeptical of their leadership. They have to come up with new strategies to combat the dark guild's unique magic and overcome internal differences within Fairy Tail.
Sasuke could also be an interesting addition to this fanfiction. His more brooding and powerful nature would contrast well with the generally more light - hearted Fairy Tail characters. And of course, characters like Erza from Fairy Tail, with her strong leadership and combat skills, would be fascinating to pair up with Naruto in different scenarios.
Naruto could be a front - line fighter. His combat skills and powerful jutsus would be great for taking on tough enemies directly. He'd be the one charging into battle without hesitation. Gaara, with his sand powers, could be a great defender. He could protect the guild hall or his comrades during battles. His sand can form barriers and attack enemies at the same time.
The Fairy Tail guild would probably be very curious about Naruto at first. They might be amazed by his strange abilities like running up walls and creating clones. Some members, like Lucy, would likely be a bit cautious, but also intrigued. Natsu would probably be eager to test his strength against Naruto right away.
If Naruto became the Fairy Tail guild master, he'd bring his own brand of determination. He might introduce new training methods inspired by his time in Konoha. For example, the tree - climbing exercise could be adapted for mages to improve their control. Naruto would also be a very inclusive guild master, accepting all kinds of wizards regardless of their past or origin, just like how he treated his friends in his own world.
If Naruto were the guild master of Fairy Tail in fanfiction, his fighting style would be a fascinating mix. Naruto has always been a scrappy fighter, relying on his wits and his ability to improvise. In Fairy Tail, he would learn to adapt to the different magical environments. He could use his Nine - Tails chakra in ways that interact with Fairy Tail magic. For instance, his Nine - Tails cloak could be enhanced with lightning magic to increase its power. His fighting style would also be influenced by the fact that he's leading a guild. He'd need to be more strategic in battles, thinking about not just his own attacks but also how to coordinate the attacks of his guild members, which is different from his more individual - focused fighting in Naruto's original world.
One possible interesting plot could be Naruto, as the guild master, having to deal with a powerful dark guild that is threatening the safety of Fairy Tail. He could use his ninja skills and leadership to gather the members and come up with a unique battle strategy.
One change would be in the training regime. Naruto could introduce more intense physical training similar to what ninjas do. This would make the Fairy Tail mages stronger physically as well as magically.