The girl OC could have been a street performer before joining Fairy Tail. Her guitar was her only means of survival. One day, she witnessed a Fairy Tail mage doing a great deed. Inspired, she decided to seek out Fairy Tail. The guitar has seen her through tough times on the streets, and now in Fairy Tail, it becomes a symbol of her journey from being alone to being part of a big family. She uses the music from her guitar to tell her story to the other members of the guild.
There was a girl in the Fairy Tail world. She was an original character (OC) named Aria. Aria carried a beautiful guitar everywhere. Her guitar was not just an instrument but also a symbol of her power. When she played it, she could influence the emotions of those around her. In a battle against a dark guild, Aria used her guitar to boost the morale of the Fairy Tail members. She played a rousing tune that filled them with courage. The unique melodies she created with her guitar made her a beloved figure in the Fairy Tail guild.
Perhaps the story focuses on the girl's journey to master the guitar as a new form of magic. She might face challenges like finding the right strings that can withstand her magic energy. Along the way, she could meet other musicians in the Fairy Tail world who teach her different tunes with unique magical effects.
Erza might be an interesting main character for this fanfic. Given her strong will and combat skills, she could incorporate the guitar into her fighting style. For instance, she could use the guitar as a weapon, slashing enemies with the sharp edges of it while also using its music to disrupt their magic.
In some fanfictions, Erza's father could be a powerful mage who was lost in a great battle against dark forces. His absence then becomes a driving force for Erza's growth and her determination to fight evil.
Well, it could be a shield made of enchanted dragon scales. In Fairy Tail, dragons are powerful and having a shield made from their scales would be super cool. It could have the ability to resist different types of magic attacks.
One idea could be that your OC is a powerful mage with a unique magic ability, like the power to control time on a small scale. They join Fairy Tail and at first are an outcast because of their strange magic. But during a big battle against a dark guild, they use their time - control magic to freeze the enemy mages for a short while, allowing Fairy Tail to win. This earns them respect and they become an important part of the guild.
Well, perhaps the OC was wrongly accused of stealing a powerful magic item from the guild. The other members turned against the OC without really listening to their side of the story. Then the OC, feeling betrayed, decides to leave Fairy Tail and seek revenge or prove their innocence on their own.
The OC could be reborn with a special connection to a long - lost magical artifact in the Fairy Tail world. Maybe they are the key to unlocking its true power. In their journey, they have to learn about the history of Fairy Tail and the artifact while also dealing with the jealousy and suspicion of some guild members who don't trust this new, unknown person. Eventually, they prove their worth and use the artifact to save the guild from a great danger, like an ancient evil that has been awakened.
Start with her origin. Decide if she was raised by a dragon or found dragon - slaying powers on her own. If she was raised by a dragon, think about how the dragon's teachings and values influenced her. For example, if the dragon was a kind and wise one, she might have a strong sense of justice. If she found the powers on her own, it could be through an ancient artifact or a mysterious encounter.
In some cases, it could be a combination of characters. For example, a group of older and more traditional Fairy Tail members who don't like the new and different ways of the OC. They work together to isolate the OC, making them feel betrayed. So, this group of conservative guild members could be seen as the antagonists.