In many Whitebeard War fanfictions, Marco the Phoenix stands out. His ability to heal and his loyalty to Whitebeard are remarkable. Also, Squard is often a memorable character. His betrayal and then possible redemption can be a very interesting arc within the fanfiction. He adds an element of internal conflict within the Whitebeard Pirates which makes the story more complex.
Nami is quite memorable. In fanfiction, she could have new interactions with Luffy in a girl - centered story. Her intelligence and her ability to navigate are assets. Another is Robin. Her mysterious past and her calm demeanor make her interesting in the context of fanfiction with Luffy. She might share some deep secrets or knowledge with Luffy in these stories.
In some fanfictions, there might be a plot twist regarding the hidden motives of the World Government. They could be revealed to have a much more sinister plan during the Whitebeard War than just taking down pirates. Maybe they are using the war as a cover to test a new and extremely dangerous weapon or to make a power play against other powerful entities in the One Piece universe. This would add a whole new layer of complexity to the story and the relationships between the different factions involved.
Another option for the main antagonist could be a corrupted version of one of Whitebeard's own crew members. This character could have been influenced by some dark power and now wants to take over Whitebeard's position. They would know all of Whitebeard's weaknesses and strategies, making them a very formidable foe for the crew.
Whitebeard himself is often a very popular character in fanfiction. His powerful presence and fatherly role in the crew make him a central figure. Writers can explore his leadership, his past battles, and his relationships with the other crew members.
In War of the Five Kings fanfiction, the Stark - like character who endures great hardships yet remains noble is very memorable. He is a symbol of hope for his people. Then there's the villainous lord who stops at nothing to gain power, his cruel deeds leaving a mark on the story. Also, the mysterious assassin who works in the shadows and has a complex backstory that is gradually revealed as the story progresses is quite unforgettable.
The enemy commanders in the fanfiction can also be memorable. They are the ones devising strategies against the Goliath, and their different personalities and approaches to warfare can create interesting conflicts. For example, one might be a cunning strategist while another is more brute - force - oriented.
A young and naive character who grows throughout the story can also be very memorable. They start off being scared and helpless but through their experiences in the post - war world, they become a strong and resourceful individual. Their transformation is inspiring and makes them stand out among the other characters.
It's hard to say for sure without reading it, but it could include the main characters from One Piece like Luffy, Zoro, and Nami. Maybe some new characters created by the fanfic writer as well.
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 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.