Sora's Keyblade skills would be very useful in the My Little Pony world. He could use it to fight off any physical threats, like monsters or villains. For instance, if there were some sort of dark creatures attacking the ponies, Sora could easily dispatch them with his combat abilities.
Sora's heart is also a powerful aspect. His pure heart and determination could inspire the ponies. In a world where friendship is magic, Sora's unwavering spirit and his ability to make friends easily could further enhance the concept of friendship in the My Little Pony world. He could teach the ponies that true friendship can overcome any obstacle, just as he has in his own adventures.
Sora's abilities from Kingdom Hearts would bring a unique dynamic to the Fairy Tail world. His Keyblade skills could be used in combat against the various dark forces and powerful foes in Fairy Tail. For example, his ability to lock and unlock different worlds could potentially lead to new storylines involving other dimensions within the Fairy Tail universe. Also, his high mobility and acrobatic fighting style would make him a formidable ally or a challenging opponent for the Fairy Tail mages.
Another aspect could be how Sora's presence affects the balance of power in the My Little Pony world. His powers are quite different from what the ponies are used to. The villains in the My Little Pony world might see Sora as a new target or a threat. Meanwhile, the ponies might look up to Sora as a new hero, and his actions could inspire them to be braver and more adventurous in protecting their own world.
Well, it depends on how you look at it. Technically, in official Kingdom Hearts content, Sora is a key character. But in the realm of fanfiction, many writers take the essence of Sora and create their own unique stories that are not part of the official canon but are still inspired by the Kingdom Hearts universe. So, in that sense, he can be considered as a major element in Kingdom Hearts fanfiction.
One way could be through the power of friendship. If Donald, Goofy and Kairi were to combine their strength and positive emotions towards Sora, it might be enough to draw his heart back. Another possibility is that there could be some kind of magical artifact or power within the fanfiction's world that has the ability to restore lost hearts. Or perhaps Sora himself has some latent power that he can tap into even without his heart, which could help him in the process of regaining it.
Their interaction would likely be a bit cautious at first. Sora might be in awe of Aqua as she is an experienced Keyblade wielder. Aqua would probably be a bit guarded but also curious about Sora.
A fanfiction about Sora getting abused could also introduce new relationships. For example, if he is being abused by a group, there could be a character who comes to his rescue and forms a strong bond with him. This new relationship could then play an important role in future events in the fanfiction, either helping Sora get revenge or helping him heal from the abuse.
They are often portrayed as two souls with a deep connection. Sora is usually the more positive and heroic one, while Roxas has his own kind of edginess. Fanfictions might show them learning from each other.
I really like 'Sora's Time - Travel Mishap'. It's a fun fanfiction where Sora somehow gets sent back in time. He has to deal with the consequences of changing the past while still trying to get back to his own time. It has some really cool interactions with younger versions of the characters we know. 'Sora's Hidden Power' is also a good read. It explores a new power that Sora discovers within himself, and how he uses it to fight against a new, powerful enemy.
Yes, in some fanfictions Sora might be depicted as afraid of X. Fanfiction writers often explore different aspects of characters' personalities, and fear can be an interesting trait to give to Sora. It could add depth to his character and create new storylines.
With Kairi, they could become closer as girlfriends in a sense. They might share more girl - talk, like about their feelings for the boys in their lives. Kairi could also help Sora get used to her new female body, teaching her things like how to style her hair or choose the right clothes. But at the same time, there could be a bit of jealousy if other boys start showing interest in Sora.