What are the common themes in 'One Piece Whitebeard OC fanfiction'?

One idea could be that the male OC is a former slave who was freed by Whitebeard. He has a deep sense of loyalty towards Whitebeard and is always ready to fight for his newfound family. His unique ability could be related to some form of water - based combat, which is rare in the One Piece world.

First, think about his backstory. For example, he could be an orphan who was taken in by the Whitebeard Pirates. This would give him a strong motivation to protect his new family. Then, consider his skills. Maybe he has a superhuman strength that he uses in battles. Also, his personality is important. He could be a joker in the crew, always making everyone laugh during tough times.

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.

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.

One great 'One Piece Whitebeard OC fanfiction' is 'The Whitebeard's New Heir'. It has an interesting OC who is a young pirate with a special ability and joins Whitebeard's crew. The story is full of action and adventure as they face off against other pirates.

One idea could be an OC who has a unique Devil Fruit ability that helps the Whitebeard Pirates in a crucial battle. For example, a fruit that can manipulate the weather in a small area to their advantage.

Many 'One Piece Robin x OC fanfiction' works explore the theme of acceptance. The OC, being an outsider in the One Piece world, has to be accepted by the characters, especially Robin. And Robin, with her own past, also has to accept the presence of this new character in her life. There's also the theme of growth, both in terms of power and character, for both Robin and the OC as they interact and go through various experiences together.

One common theme is adventure. Since One Piece is all about adventure, the OC usually embarks on various adventures in the world of One Piece while building their harem. Another theme is the development of relationships. There's the building of romantic and sometimes platonic relationships between the OC and the harem members.