Well, one interesting concept could be the unique relationships that the original character (OC) has with Eustass Kidd. Maybe the OC is a rival who challenges Kidd in unexpected ways, like in battles of wits rather than just physical strength.
Another concept might be how the OC fits into the complex world of One Piece. For example, they could have a special Devil Fruit ability that either complements or clashes with Kidd's powers. This can lead to really cool story arcs where they have to learn to work together or constantly be at odds. The OC could also have a backstory that ties in with Kidd's, like being from the same island but having different views on piracy.
One interesting concept could be unique character backstories. For example, an OC (Original Character) might have a past related to a forgotten island in the One Piece world. Another concept could be special abilities. Maybe an OC in the crew has the power to control the sea currents in a unique way. Also, the relationships between the OC crew members and the canon characters can be really engaging, like an OC having a deep friendship with Luffy based on a shared dream of finding a certain treasure.
One interesting concept could be an OC animal that has the power of a Logia - type devil fruit. For example, an OC that is a fox and has the ability to turn into a fiery fox or control fire, similar to how Ace could control fire. This would make for an exciting adventure as they could use their powers to fight against the bad guys in the One Piece world.
One interesting concept could be an OC who is a mermaid. In the One Piece world, mermaids are unique and she could have special abilities related to water or communication with sea creatures. For example, she might be able to use her singing to calm storms or communicate with ancient sea kings.
One interesting concept could be a new Yonko character with a unique power. For example, an OC with the ability to control time in a very different way than what we've seen in the original One Piece. This could create all kinds of new storylines and battles.
In this type of fanfiction, the role - playing aspect within the Marine world is a great concept. OCs can take on various roles like a Marine scientist, an undercover agent, or a front - line combatant. The fanfiction might explore how these different roles interact with each other. For instance, a Marine scientist OC might develop new technologies to combat pirates, which then affects the strategies of the combatant OCs.
One interesting concept could be a male OC who is a long - lost relative of a well - known character. For example, he could be related to Luffy and have a similar but unique ability. Another idea is an OC who is a former marine turned pirate, with a complex backstory of disillusionment with the marines' ways. A third concept might be a male OC from a previously unmentioned island with a very strange and powerful Devil Fruit ability that he has to learn to control while on his adventures in the One Piece world.
Well, one interesting concept could be unique character designs. OCs (Original Characters) in these fanfics often have distinct abilities and backstories that add new layers to the One Piece world. For example, an OC with the power to control sea currents in a very special way can create exciting plot twists. Another concept is new crew formations. They might form crews with different dynamics compared to the existing ones in the official story.
The original character (OC) is also a main character. This could be a self - inserted character created by the fanfic writer, who has their own set of abilities, dreams, and flaws. They might be a pirate, a marine, or someone with a completely different role in the One Piece universe.
The Kidd Dragon OC might possess enhanced strength, just like Kidd has his own physical strength, but amplified by dragon - like genetics. It could also have a connection to the sea, as dragons in One Piece often seem to have some sort of relationship with the elements. Maybe it can control water currents around it to its advantage during sea battles or while exploring islands.
One idea could be that the e kidd dragon shifter oc joins Luffy's crew. They could use their dragon shifting abilities to help the crew during battles, like flying above enemies to spot their weaknesses or breathing fire to fend off large groups. Another plot could involve the oc having a past connection to a powerful One Piece villain, and they must face their past while on their journey with the Straw Hats.