Obviously, Naruto is a main character in these fanfictions. He's usually the one who gets the red eyes and the connection to the Darkness Dragon. Sasuke might also be involved, either as a rival who is intrigued by Naruto's new power or as a partner in exploring the secrets of the red eyes. Sakura could be there as well, perhaps trying to help Naruto control the power so it doesn't consume him. And sometimes, characters from other clans or villages might make an appearance, like Gaara, who might be interested in the power because of its potential threat or its possible use in protecting his own village.
One unique plot idea could be that the character with red eyes has a special connection to the Darkness Dragon that gives them the power to control shadows in a way Naruto's regular jutsu can't. For example, they can use the dragon's power to create illusions within the shadows that are almost impossible to break. Another idea is that the red eyes are a sign of a long - lost clan related to the Darkness Dragon, and Naruto discovers he has some heritage from this clan, leading to a whole new set of powers and a journey to discover his clan's past. Also, perhaps the Darkness Dragon is sealed within Naruto and he has to learn to control its power without being consumed by the darkness it represents.
One possible fanfic could be about Joey Wheeler's journey to obtain the Red - Eyes Darkness Dragon. He might start off as an underdog, facing many challenges in the dueling world. Maybe he discovers a hidden power within the card that not only makes him a stronger duelist but also changes his relationship with his friends. He could have to protect the card from an evil force that wants to use it for their own dark purposes.
One great Naruto fanfiction with red eyes and black dragon elements could be 'The Red - Eyed Shinobi and the Black Dragon's Bond'. In this fic, the main character, who has red eyes, forms an unexpected connection with a black dragon. It's full of action and adventure as they face off against powerful foes together.
A plotline could be Joey Wheeler getting trapped in a parallel dueling dimension where the Red - Eyes Darkness Dragon is the only card that can save him. He has to figure out how to unlock the true power of the card while facing off against powerful duelists from that dimension. Another idea is that the Red - Eyes Darkness Dragon card gets corrupted, and Joey has to find a way to purify it. This could involve a quest for special items or a journey to a sacred place in the dueling world.
In a Naruto fanfiction with red eyes, he might gain this trait as a result of a new power-up. For example, he could encounter a powerful sage or a mysterious entity that bestows him with this red - eyed form. His abilities would likely change as well. He could have enhanced perception, like being able to see chakra more clearly or even predict his opponents' moves better. His friends might be initially shocked but would soon accept this new Naruto as he uses his powers for the good of the village.
Unique power dynamics. For example, if the red eyes give the character some special ability related to the black dragon, like being able to see its hidden lairs or communicate telepathically. It sets it apart from the regular Naruto stories.
Red Eyes Ultimate Dragon is a really cool concept in fanfiction. In many fanfics, it's often depicted with extraordinary powers. Some stories might focus on its origin, like how it came to be in a different, more powerful form than in the original series. It's always exciting to see how authors play with its abilities and characteristics.
I'm not entirely sure as it depends on the specific fanfiction. But generally, it might involve Naruto having some connection with a 'dragon of darkness'. It could be about Naruto facing new challenges or powers related to this dark dragon concept.
One common theme is power. Writers often explore just how powerful the Red Eyes Ultimate Dragon can be. Another theme is loyalty. In some fanfics, the dragon shows unwavering loyalty to its master.