In this 'scarlet destiny fairy tail fanfiction', it could be that the scarlet represents a symbol of passion or a powerful force. The story might be about a character who discovers their true destiny which is linked to this scarlet element. They may start off as an ordinary member of the Fairy Tail guild but as they uncover the secrets behind the scarlet destiny, they grow in power and become an important figure in the guild's future.
Since it's a fanfiction, the main characters could be new creations by the author. However, it's also likely to include some of the well - known Fairy Tail characters like Natsu, Lucy, Gray, etc. Maybe there's a new character with a scarlet - related power who becomes a central figure, interacting with the original Fairy Tail gang.
One common theme is friendship, just like in the original Fairy Tail. Scarlet lilies might be used as a symbol of a deep and unbreakable bond between characters. Another theme could be magic. Maybe the scarlet lilies have some sort of magical power in the fanfiction, like being able to heal or enhance a wizard's abilities. Adventure is also likely. The characters might go on a quest related to the scarlet lilies, perhaps to find the rarest of them or to protect them from an evil force.
They could be a key to a hidden treasure. In the Fairy Tail world, there could be a legend that says the scarlet lilies hold the key to a great treasure. So the characters go on a hunt for these lilies. Another way is as a power source. Maybe some dark wizard wants to use the energy of the scarlet lilies for evil, and the Fairy Tail guild has to stop them.
One possible fanfiction could be about Erza Scarlet getting a special tattoo by Nuarto that gives her some unique power in the Fairy Tail universe. Maybe it's a tattoo that has a connection to her past or unlocks a hidden magic ability.
Erza Scarlet is a very strong and complex character in Fairy Tail. She is known for her strict and disciplined nature. She has a tragic backstory where she was enslaved at a young age on the Tower of Heaven. But she overcame that and became one of the most powerful mages in the guild. She is often seen leading the charge in battles and is respected by all her guildmates for her strength and leadership.
One of her major achievements was helping to defeat the dark guild Phantom Lord. Her strength in battle was crucial in protecting Fairy Tail. Another significant thing was her role in the Tower of Heaven arc. By facing her past and the people who once enslaved her, she not only freed herself but also the other slaves there. It was a huge step in her character development as well as a great victory for justice.
An ancient sea demon that awakens during the Scarlet Tides. This demon was once sealed away but the power of the tides breaks the seal. It has a vendetta against the Fairy Tail guild because they were involved in its original sealing. So it sets out to destroy the guild and everything they hold dear.
One idea could be that a new character arrives in Magnolia during the Scarlet Tides event. This character has a mysterious power related to the tides and ends up joining Fairy Tail. They then have to work with the guild members to solve a mystery that is causing chaos during the tides.
I'm not entirely sure if there are Naruto fanfictions specifically about Erza Scarlet from Fairy Tail and her tattoos. It depends on the creativity of the fanfiction authors. Some might see the potential in mixing these two different anime universes and come up with interesting stories involving Erza's tattoos in a Naruto - like setting. You could start by looking on popular fanfiction websites and using relevant search terms.