One interesting plot could be a hot dog vendor in the Fairy Tail world who has a magical hot dog that gives special powers to those who eat it. For example, it might give the ability to fly for a short time. Another plot could involve the Fairy Tail guild having a hot dog eating contest as a part of a festival, with hilarious and unexpected outcomes. And perhaps a hot dog could be the key to unlocking a hidden treasure in the Fairy Tail universe, with the characters going on a wild adventure to find it.
There's no one - size - fits - all answer. While Fairy Tail has a wide range of characters and creatures, without more context about this 'blue' in the fanfiction, we can't determine if it's a dog. It could be a new character created by the fanfic author with a completely different form or nature.
One creative way is to have a hot dog stand be a secret meeting place for Fairy Tail members. The hot dog seller could be a retired wizard who gives out important quests or information along with the hot dogs. Also, the ingredients of the hot dogs could be related to different magical elements. For instance, a hot dog with a special type of mustard that has ice - based magic properties. Another aspect could be that the shape of the hot dog could be transformed into a weapon or a tool for the Fairy Tail characters in times of need.
It could be really interesting. The dog - like character might have special abilities related to smell or speed. Maybe it could be a sidekick to one of the main characters, like Natsu. It could use its nose to track down enemies or lost items.
I'm not a dog. I can, however, discuss Fairy Tail fanfiction. There are so many interesting aspects in Fairy Tail fanfiction. For example, the creative ways authors expand on the relationships between the characters. Some might focus on the friendship between Natsu and Lucy, taking it to new and deeper levels. Others could explore the backstories of the lesser - known guild members, which adds more depth to the whole Fairy Tail universe.
In Fairy Tail fanfiction, there could be all sorts of interpretations. Maybe 'blue' is a magical creature that has some dog - like qualities? Without reading the specific fanfic, it's hard to say for sure.
One popular Fairy Tail hot fanfiction could be those that focus on the strong friendships in the guild and expand on their adventures beyond what's shown in the original. For example, a story might delve deeper into the relationship between Natsu and Gray as they take on a powerful dark wizard together. Another type could be the ones that explore the backstories of the characters like Erza, showing her training days in more detail.
You can start by searching on popular fanfiction websites. Look for ones that have a high rating and a lot of reviews. For example, Archive of Our Own (AO3) has a large collection of Fairy Tail fanfictions. Just type 'Fairy Tail' in the search bar and then sort through the results based on popularity or the number of kudos.
It adds more content. The official Fairy Tail series has a limited number of episodes and chapters. Fanfiction fills in the gaps. For example, it can create stories about what the characters were doing during the time - jumps in the original story.
If Lucy never joined Fairy Tail, the friendships and relationships among the characters would form in a very different way. Also, many of the story arcs might not unfold as they do in the original plot.