One interesting plot idea could be that Aokiji, after leaving the Marines, crosses paths with Robin. They start to share their knowledge of the lost history. Aokiji's past experiences in the Marines and his knowledge of certain secrets could complement Robin's search for the true history. Another plot could involve them teaming up against a common enemy who is trying to destroy all evidence of the Void Century. They use their unique abilities, Aokiji's ice powers and Robin's ability to sprout body parts on any surface, to fight off the enemy and protect the ancient artifacts related to the One Piece world's history.
Well, a great plot might be that the OC is an artist who can draw the secrets of the Poneglyphs without actually reading them. Robin is fascinated by this ability and they work together to uncover the true history of the world. Also, perhaps the OC has a connection to Robin's past, like knowing someone who was important to her family, which creates an emotional bond between them.
One idea could be that during a dangerous adventure, Zoro and Robin get separated from the crew. They have to rely on each other's skills. Zoro's combat abilities and Robin's knowledge of ancient texts help them navigate through an ancient, forgotten island filled with mysteries and traps.
Their relationship could start with distrust. Aokiji being a former Marine and Robin being a wanted archaeologist. But as they interact more, they might find common ground in their search for truth. Maybe they start to share stories about their pasts, which slowly builds a bond between them.
One idea could be to have Batman and Robin face a villain who has the power to manipulate time. They would have to figure out how to stop the villain from changing history. Another could be that Robin gets kidnapped by a new, never - before - seen criminal and Batman has to use all his detective skills to find him. Maybe a third idea is that a powerful alien lands in Gotham and Batman and Robin have to team up with other heroes to deal with it.
Perhaps Robin's red color is a sign of his being chosen by a secret order. He then embarks on a journey to learn the ways of this order, facing various challenges and making new allies along the way. In the fanfiction, his red attire could hold special significance within the order's lore.
Another plot could be that Blackfire comes to Earth seeking refuge from some intergalactic trouble. Robin is the one assigned to protect her. At first, Blackfire resents the protection, but as time passes, she realizes Robin's good intentions and they form an unexpected bond. Their adventures on Earth, with Robin showing Blackfire the beauty and uniqueness of the planet, could be really engaging.
One idea could be a time - travel plot where Robin from the present meets a younger Lucina. They could initially be at odds due to their different understandings of the future and past events. But as they spend time together, they start to understand each other and develop feelings. Another plot could be set during a war where they have to fight side by side and rely on each other's skills. This shared experience could bring them closer. A third idea is a story where they meet in a peaceful village and help the villagers together. Through their acts of kindness, they fall in love.
One possible plot could be that Robin discovers an ancient text that leads to a powerful and mysterious treasure. Luffy, being eager for adventure, decides they must go after it immediately. Along the way, they face various enemies and challenges. Robin uses her knowledge to decipher clues, and Luffy uses his strength to fight off foes. They might also meet some old friends from the Straw Hat crew who join them on this new quest, making the journey full of reunions and new memories.
There are several factors. Their different personalities and the potential for character development in a fanfic setting. Robin's past traumas and her search for knowledge contrast with Aokiji's more easy - going but still complex personality. Writers can explore how they influence each other, and how their relationship could evolve over the course of a story. Additionally, the world - building opportunities in a Robin x Aokiji fanfic are great, as they can be placed in various locations in the One Piece world and interact with different characters, all while their relationship is at the center of the story.
One idea could be that Robin discovers a dark secret about Batman's past that makes him question their relationship, leading to a tense confrontation. For example, if Robin finds out that Batman once made a deal with a villain that had far - reaching consequences. Another plot could involve a new villain manipulating Robin into believing Batman is a threat to Gotham, causing them to fight. Maybe the villain uses mind - control technology.