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.
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.
Some popular Fairy Tail fanfiction themes include adventures of the main characters in new magical realms. For example, stories about Natsu and his friends exploring uncharted magical islands filled with unique creatures and new types of magic. Another theme could be the backstories of secondary characters, like how Gray got his magic in more detail or the early life of Erza.
Some popular ones revolve around the backstories of the characters. Like exploring how Erza got her first set of armor or how Gray learned a particular ice - magic spell. These fanfictions add depth to the existing characters and are family - friendly.
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.
In Fairy Tail fanfiction, Deku could be a very interesting addition. He might bring his heroic and determined nature from My Hero Academia. He could start as an outsider, much like he was in the beginning of his own story, and have to prove himself to the Fairy Tail guild. His unique power, One For All, would also be an exciting element to incorporate, perhaps having different interactions with Fairy Tail's magic system.
It would be amazing. You could meet all those unique and powerful wizards. Maybe you'd join a guild and go on adventures, fighting powerful dark mages and discovering new magic spells.
In a fanfiction scenario of being in Fairy Tail with Kido, there are numerous possibilities. Kido's personality would play a big role. If he's the quiet and mysterious type, it could contrast with the more boisterous members of Fairy Tail. His presence might even inspire some of the younger members to develop new skills. He could participate in the guild's festivals and competitions, showing off his unique abilities. And there could be a whole arc where Kido has to overcome his own past traumas with the help of the Fairy Tail family, creating a deep and engaging story within the fanfiction.
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.
In some fanfictions, Wendy and Chelia are portrayed as rivals. They constantly compete to prove who is the better mage. For example, they might have competitions to see who can heal more people in a short amount of time or who can defeat a mock enemy faster. This rivalry, though, is often friendly and pushes them to improve.