One plot idea could be an OC who discovers a hidden conspiracy within the Syndicate. They start to uncover secrets that could change the balance of power in the Darker than Black world. Another idea is an OC Contractor who has lost their memory and is trying to figure out their past while being hunted by other Contractors. Or, a plot where an OC is a normal human who gets caught in the middle of a war between Contractors and tries to find a way to bring peace.
A good plot idea for Darker than Black OC fanfiction is an OC who has a unique ability that no other Contractor has. This ability makes them a target for both the Syndicate and other Contractors. As they try to hide from their pursuers, they stumble upon an ancient secret about the origin of Contractors. Another plot could be an OC who forms an unlikely alliance with a well - known character from the series to take down a powerful and corrupt Contractor. They have to overcome their differences and work together in a world full of danger and betrayal.
One idea could be exploring Hei's past in more detail. Maybe a story where he has to face a threat from his old organization that forces him to remember things he'd rather forget. Another could be a fanfiction where Hei teams up with an unexpected ally, like a character from a different anime universe, to solve a mystery in the Darker than Black world.
One idea could be a story where Hei has to protect Misaki from a new, powerful enemy that is after her because of her knowledge of Contractors. This would put them in a lot of dangerous situations and force them to rely on each other more than ever.
One plot idea could be that Naruto characters gain the powers of Contractors from Darker than Black. For example, Naruto himself could have a Contractor power related to his shadow clones, like being able to send his clones to different dimensions for a short time. Another idea is a story where the organizations in both universes collide. The Akatsuki from Naruto and the Syndicate from Darker than Black might have different goals but similar methods of achieving them. They could either fight or try to make an alliance depending on the situation.
A plot idea could be that there is a strange phenomenon affecting Contractors and Dolls, and Misaki and Hei are the only ones who seem to be immune at first. They then have to investigate the cause while also dealing with the suspicion and fear from others in their respective communities. As they dig deeper, they find out that it has something to do with an ancient and forgotten power that is starting to resurface.
Another interesting aspect could be delving into the backstories of minor characters but in a much darker light. For instance, what if Rock Lee had a past filled with abuse and trauma that made his drive to succeed even more complex? In this 'Naruto darker than black' fanfiction, we could see how these darker backstories shape the characters' present actions.
Perhaps a plot where an outside force tries to manipulate Hei and Yin's relationship. They have to figure out who is behind it and in the process, they learn more about their own feelings for each other. This could involve some intense action scenes as they are constantly under attack while trying to solve the mystery.
Well, start with the appearance. In Darker than Black, the look of the characters can be quite distinct. Your OC could have a signature look, like a particular style of clothing or a unique hair color. Then, there's the matter of their moral compass. Are they on the side of good, bad, or somewhere in between? This can add a lot of depth to the character. And don't forget about their weaknesses. A character with flaws is more relatable. Maybe your OC has a fear of a certain type of ability or a psychological weakness that can be exploited. This will make them more complex and interesting in the fanfiction.
The plot might start with an introduction of their relationship, whether it's one of mistrust or an immediate connection. Then it could develop as they face various challenges together, perhaps related to the world of Contractors. As the story progresses, their bond may strengthen or be tested in different ways.
One interesting story could be about a new Contractor with a unique power that changes the power balance in the Darker than Black world. Maybe they have the ability to manipulate time on a small scale, which leads to all sorts of adventures and conflicts with other Contractors.
One idea could be an OC who is a scientist from a small, isolated Wakandan village. This OC discovers a new type of vibranium - like mineral that has unique properties. They then have to convince the royal family and the Wakandan scientific community to take it seriously, facing many challenges along the way.