How would the story of Fairy Tail change if Jellal joins in fanfiction?

Well, he might bring in a new level of power. His skills and knowledge could enhance the guild's capabilities in battles against strong foes. Also, his past relationship with some of the members, like Erza, would add a lot of interesting drama and character development within the fanfiction.

The power balance might shift. If Sayla is strong, she could change the way battles are fought in the guild. For example, if she has some sort of strategic magic, she could help plan attacks better.

The guild would become more protective. Members like Gray and Lucy would probably offer their help in various ways, like helping with baby - proofing their living quarters or giving advice on parenting. It would also add a more family - like atmosphere to the guild. There would be more anticipation and excitement for the new arrival.

Well, Goku's powers are mainly based on ki manipulation, which is somewhat similar to magic in the Fairy Tail world. If he joins Fairy Tail, he could probably learn to combine his ki with the magic of Fairy Tail. For example, he might be able to infuse his ki into Natsu's fire magic to make it even more powerful. Also, his teleportation technique, like Instant Transmission, could be a great asset during battles and rescue missions in the Fairy Tail universe.

Naruto's personality is a key factor. His determination is unbreakable. In Fairy Tail, this would mean he'd never back down from a challenge, no matter how tough. His ability to forgive and see the good in people would be a great influence. For example, if there were members who had a dark past or made mistakes, Naruto would be the one to accept them and encourage them to move forward. His sense of humor, though sometimes a bit silly, would lighten the mood during difficult times in the guild. All in all, his personality would have a very positive impact on Fairy Tail.

Well, if Natsu had the Sharingan in a fanfiction, it would likely enhance his combat abilities significantly. He could predict his opponents' moves more accurately, similar to how Sasuke uses it in Naruto. This would make him even more formidable in battles against strong foes in the Fairy Tail world. Maybe he could use it to analyze magic spells and find their weaknesses faster.

If Happy dies, Natsu's power might be affected. Happy has always been by Natsu's side, and his death could cause Natsu to lose some of his confidence. For example, Natsu might not be as reckless in battles without Happy's support. The story could then shift to Natsu trying to regain his former self while also seeking revenge on whoever caused Happy's death.

Kakashi's ability to manipulate chakra could be seen as a form of magic in the Fairy Tail world. His Sharingan could potentially unlock new forms of magic or enhance existing ones. For example, if he were to team up with Erza, his Sharingan could help her analyze her opponents' defenses better, allowing her to break through them more easily. His teleportation techniques could also be used to quickly move around the battlefield, something that would be very useful in large - scale battles against powerful dark guilds.

Some members might be initially cautious. Given her past as a powerful and somewhat feared being, they would be worried about her true intentions. For example, Gray might be on guard until he sees her actions are genuine.

Ichigo's powers would adapt by evolving through new challenges. In Fairy Tail, he'd face different kinds of enemies compared to Bleach. His ability to sense spiritual pressure might be tweaked to sense magic power instead. His Hollow powers, which are often seen as a dark side in Bleach, could be seen as a powerful and somewhat unruly form of magic in Fairy Tail. He would need to learn to control it better in the new environment.