Sasuke is often very popular in these fanfictions. Since he was one of the main characters in the original series to have a cursed seal, many fanfictions focus on his further adventures with the seal, or even his attempts to rid himself of it completely. His complex personality and his struggle with power make him an interesting subject.
One interesting concept could be the exploration of how different characters handle the cursed seal's power. For example, some might struggle more than others, like Sasuke did in the original series. The fanfiction could also delve into creating new types of cursed seals with unique abilities, perhaps ones that affect the user's chakra in unexpected ways.
Jiraiya is another character that could be present. As Naruto's mentor, he would be concerned about Naruto getting the cursed seal. He might try to find a way to remove it or at least teach Naruto how to manage it without losing himself. Jiraiya's vast knowledge of ninja arts could play a crucial role in Naruto's struggle with the cursed seal.
Orochimaru is another character that could be in these fanfictions. Since he was involved in creating and using cursed seals, he might be interested in the Cursed Seal of Earth for his own devious purposes. He could be the main antagonist, trying to steal the power of the seal or manipulate the character who has it.
One interesting storyline could be about a character who has the Cursed Seal of Earth and struggles to control its power. They might go on a journey to find a way to master it without losing their sanity.
One interesting plotline could be Naruto struggling to control the power of the cursed seal. He might initially be afraid of it but then gradually learn to harness it for good, like using it to protect his friends in a battle against a powerful enemy.
There are fanfictions where the Cursed Seal of Fire has a hidden origin. For example, it could be linked to an ancient clan that Naruto discovers he has a connection to through this seal. This discovery then leads him on a journey to uncover more about his past and the power within the seal.
One interesting 'Cursed Seal Naruto Fanfic' story could be about Naruto learning to control the power of the cursed seal in a unique way. For example, instead of it being a purely negative force, he finds a way to use it to enhance his regular jutsu without succumbing to its dark side. This could involve him training with an unexpected ally who has knowledge of ancient sealing techniques.
Often in 'Cursed Seal Naruto Fanfic', the seal changes Naruto's relationships. His friends might be a bit more cautious around him at first. But as Naruto shows that he's in control, it could strengthen their bonds. For example, Kakashi might take a more hands - on approach in training Naruto to handle the seal, which in turn deepens their master - student relationship. And with his enemies, the cursed seal might make him a more feared and targeted figure, forcing Naruto to adapt his fighting style and strategy.
Some fanfictions might explore the idea that the Cursed Seal of Fire is slowly consuming Naruto. He has to race against time to find a way to either remove it or find a balance. This could involve seeking out reclusive sages or ancient scrolls that hold the secrets to dealing with the seal.