One common trait is their immortality or extended lifespan. This allows them to have a different perspective on the events in the One Piece world compared to regular characters. They also tend to have some sort of special ability related to their vampiric nature. It could be the ability to transform into a bat or mist, like in traditional vampire lore. And their appearance usually has some sort of pale complexion and sharp fangs which are iconic vampire features. In many fanfictions, they are also outsiders in the pirate world, trying to find their place among the more 'normal' pirates and adventurers.
Often, they have enhanced physical abilities like super strength and speed. They usually have a thirst for blood which can be a source of conflict or a unique power - up mechanic. For example, in some fanfics, they can gain extra strength by drinking the blood of strong foes.
Often, male oc in one piece fanfiction are brave. They have to be in order to survive in the dangerous world of pirates. For example, they might face powerful enemies like the Marines or other pirate crews without hesitation.
One common trait is having overpowered abilities. For instance, they might have the ability to control all types of sea kings effortlessly, which is not something normal in the One Piece world. Another trait could be having unlimited resources like an endless supply of Berries or rare items.
He might have enhanced senses. For example, his vision could be much sharper, allowing him to see in the dark easily. His hearing could also be extremely acute, picking up on the faintest of sounds.
One good trait could be charm. Vampires are often depicted as charming in many stories, and in Game of Thrones, this could be used to manipulate other characters. Another is intelligence. A smart vampire OC could outwit their enemies and navigate the complex political landscape. Also, loyalty can be an interesting trait. Maybe they are loyal to a particular cause or person, which could drive their actions in the story.
A prevalent theme in One Piece Fishman OC fanfiction is the pursuit of power. The OC fishman often wants to become stronger, either to protect their own kind or to achieve personal goals. This can involve training with unique fishman techniques or seeking out powerful treasures. Also, friendship is a common theme. Just like in the main One Piece story, the Fishman OC forms bonds with other characters, which can be humans, other Fishmen, or even different species. These friendships help them grow and face challenges. In some fanfictions, there's also the theme of redemption, where a Fishman OC who has made mistakes in the past tries to make amends.
A third common theme is the relationship with pirates. In OC Marine One Piece fanfiction, the interactions between the OC Marines and pirates can range from intense battles to unexpected alliances. Sometimes, the OC Marines might learn something from the pirates about freedom or the true nature of the world, which challenges their beliefs as Marines. This creates a lot of interesting storylines and character development.
One common theme is self - discovery. Female OCs often start out not knowing their true potential and then through their adventures in the One Piece world, they learn about themselves. For example, they might discover hidden powers or talents.
Another theme is the search for family. Since Whitebeard's crew is like a big family, the OCs often find a sense of belonging within the crew. They might have had a rough past without a proper family, but with Whitebeard's crew, they finally have a place to call home. This is explored in a lot of fanfictions through the OC's journey of self - discovery and acceptance within the crew.
One common theme is adventure. Since One Piece is all about adventure, many fanfictions with Shirahoshi OCs involve her going on new quests or exploring uncharted areas in the One Piece world.
Many male OCs are also unique in their abilities. Some might have a special form of Haki or a new type of Devil Fruit power. They use these abilities to make their mark in the 'One Piece' world. And they usually have a backstory that ties into their motivation. It could be something like seeking revenge for a lost family or proving themselves to the world. This backstory gives depth to their character and makes their actions more understandable in the context of the fanfic.