Gildarts could be the most interesting character. He is one of the strongest members of Fairy Tail. In a 'Fairy Tail Dragon King Festival' fanfiction, he could return from his travels just in time for the festival. His experience and powerful magic could be crucial in dealing with any unexpected events during the festival. He might also have some past knowledge about the festival that no one else in the guild knows, which could add a lot of mystery and intrigue to the story.
I think Natsu would be the most interesting. His brash and hot - headed nature combined with his powerful Fire Dragon Slayer magic would make for some exciting scenes during the festival. He would probably be the first to jump into any challenges or battles related to the festival.
The fanfiction could center around the origin of the Dragon King Festival. Maybe it was created as a peace treaty between humans and dragons long ago. But now, some dark forces are trying to disrupt it. The Fairy Tail guild has to step in and protect the festival. Lucy could use her celestial spirit magic to gather information, Gray could freeze enemies in their tracks, and Erza with her requip magic could lead the charge against any threats to the festival.
Definitely Gray. Their personalities are quite different. Gray is cool - headed and uses ice magic, while Wolverine is more of a rough - and - tumble fighter. The contrast in their powers and attitudes would lead to some great banter and interesting team - up moments.
One interesting pairing could be Goku and Natsu. Goku is all about power and the pursuit of strength, while Natsu has a similar drive. They could have some really intense training sessions together. Another cool pairing would be Vegeta and Gray. Vegeta's serious and often - cold demeanor could contrast with Gray's more laid - back but still determined attitude. And then there's Bulma and Lucy. Bulma's intelligence and technological know - how could pair well with Lucy's celestial spirit magic knowledge. They could work together to create some new gadgets or strategies.
Goku and Natsu would be an interesting pair. Goku is always looking for a strong opponent to fight and improve his skills. Natsu, on the other hand, is a hot - headed but powerful wizard. Their fighting styles are quite different. Goku relies on his martial arts and ki abilities, while Natsu uses his fire dragon slayer magic. They could learn a lot from each other. For example, Goku could teach Natsu about physical conditioning, and Natsu could show Goku some unique magical techniques.
The Dragon King in Fairy Tail fanfiction could be a character that is related to the main characters in some way. Maybe it's a long - lost ancestor of Natsu or another dragon slayer. It could also be a villainous figure, bent on ruling over all the dragons and using their power to take over the world of Fairy Tail. In some fanfictions, the Dragon King might have a tragic backstory that led it to become the way it is, like being betrayed by humans in the past and now seeking revenge.
Natsu Dragneel is often a very popular character in this type of fanfiction. Since he has a connection to dragons already in the original Fairy Tail series, it's easy to incorporate him into Dragon King - related stories. Another popular one could be Igneel, as he is a powerful Dragon King in the lore.
Yugi and Natsu would be an interesting pairing. Yugi is calm and strategic, while Natsu is impulsive and powerful. They could balance each other out. Yugi could use his intelligence to plan their adventures, while Natsu could use his fire - based magic to fight off enemies. Another interesting pair could be Erza and Kaiba. Erza is a strong and disciplined warrior, and Kaiba is a proud and powerful Duelist. They could have some epic battles of wills and skills.
Erza and Captain America would be an amazing combination. Erza is a strong and disciplined warrior in Fairy Tail, and Captain America is the symbol of justice and leadership in the Avengers. Erza's various armors and combat skills combined with Captain America's shield and strategic thinking would make them a formidable team. They could lead the combined forces of Fairy Tail and the Avengers in battles against powerful foes, and also inspire the other characters with their unwavering determination.
Spiderman and Erza would make for a strong pairing. Erza is a very powerful and disciplined mage. Spiderman could be in awe of her combat skills and leadership. They could fight side - side against powerful enemies, with Spiderman using his webs and agility and Erza with her various armors and weapons.
I think Kakashi and Gray would have some cool interactions. Gray's ice - magic and Kakashi's fire - based attacks (like Fireball Jutsu) could lead to some interesting battles or training sessions. Also, Kakashi and Lucy could be fun. Lucy's celestial spirit magic and Kakashi's summoning jutsu could be compared and contrasted. And of course, Kakashi and Makarov. The old and wise guild master could give Kakashi some unique insights about the Fairy Tail world, and Kakashi could share his ninja wisdom with Makarov.