Perhaps a plot where Natsu and Wendy are transported to a parallel world where their roles as dragon slayers are completely different. In this world, they are the only hope against an evil dragon that has enslaved all the other dragon slayers. They must quickly adapt to this new reality and use their sibling bond to figure out how to defeat the dragon.
Their relationship can be developed by having them share more personal stories about their past with the dragons. For example, Natsu could tell Wendy about Igneel's funny habits, and Wendy could share her memories of Grandeeney. This would strengthen their bond as siblings who share a common dragon - slayer heritage.
Yes, in certain fanfictions Natsu and Wendy are considered siblings. This could be due to various reasons. Maybe the author wants to explore a different family dynamic within the Fairy Tail world. It can add an interesting layer to their relationship, like how they support each other more like family members would. Also, it might change the way they interact with other guild members as well.
In the 'king of dragon slayer fanfiction', Natsu is likely a central figure. He might have special powers related to slaying dragons, like breathing fire or having enhanced strength. His character could be developed in ways that are different from the original series, perhaps with new relationships and challenges within the fanfiction world.
Wendy would probably be surprised at first. After all, Natsu's greetings are often unexpected. But then she would be really happy, with a big smile on her face. She might blush a little too, since it's such a special and personal greeting from Natsu.
A common theme is sacrifice. Sometimes, one sibling has to sacrifice something, like a personal goal or a relationship outside of the family, for the sake of the dragon - slaying mission and for the safety of their brother or sister. Another theme is the discovery of hidden powers. As they fight dragons, they often discover new abilities within themselves that they didn't know they had, which helps them in their quests.
Natsu might be considered alpha because of his fiery personality. His boldness and determination make him stand out among the dragon slayers in fanfiction.
One great fanfiction could be 'Natsu's Ascent'. In this, Natsu discovers new powers as a third - generation dragon slayer and goes on a journey to find a hidden dragon lair. It has a lot of action and great character development.
Well, in fanfiction, Natsu as an alpha dragon slayer can have a different relationship with his dragon side. He may have more control over it or be able to access more of its power. His personality might also become more assertive. He doesn't shy away from taking charge, whether it's in a fight or in coming up with plans to solve problems. He may also have some new abilities that are unique to his alpha status, like being able to sense danger from farther away or having a special connection with other alpha - like beings in the magical realm.
Natsu might be considered the alpha in dragon slayer fanfiction because of his strong leadership skills. He often takes charge in difficult situations and his comrades look up to him. His determination and unwavering will to fight also contribute to this perception.