The idea of Hashirama being sealed inside Naruto in fanfiction often serves multiple purposes. For one, it's a creative way to combine the powers and legacies of two of the most important characters in the Naruto universe. Hashirama was the first Hokage and had amazing powers, and Naruto is the protagonist. By sealing Hashirama inside Naruto, it can create a scenario where Naruto has to come to terms with this new power. He may face challenges in controlling it, as Hashirama's power is very different from his own. It can also lead to new relationships in the story, like how Naruto's friends and allies react to this new development. Maybe they're worried about Naruto being consumed by Hashirama's power, or they see it as an opportunity to defeat stronger enemies. This concept in fanfiction can really expand on the existing Naruto lore and create exciting new story directions.
In some Naruto fanfictions, after Hashirama was sealed, it could lead to a power imbalance in the ninja world. His sealing might be a plot device used by the antagonist to gain an upper hand. For example, if a powerful enemy sealed Hashirama away, it would remove one of the most powerful forces that could oppose them, allowing them to carry out their evil plans more freely.
When Hashirama is sealed inside Naruto in fanfiction, the plot could take a turn where Naruto has to learn about Hashirama's past and his way of thinking. This could be through dreams or visions. As he does this, he might gain new insights into the history of the ninja world and how to use Hashirama's power more effectively. Also, it could lead to conflicts with other characters who either fear or envy Naruto's new power.
One idea could be exploring how Hashirama's sealing affects the balance of power in the ninja world. For example, other villages might see it as an opportunity to gain an edge over Konoha.
In some fanfictions, it could be due to a miscalculation during a powerful jutsu battle. For example, if they were trying to seal away an even greater threat together, but something went wrong and they ended up being sealed instead. This could lead to a whole new set of adventures for the other characters in the Naruto world as they try to figure out how to free them.
One plot could be centered around a prophecy that Anubis' sealing was a sign of an impending doom for the Naruto world. A young ninja discovers this prophecy and embarks on a journey to find out more about Anubis and how to either keep him sealed or destroy him if he gets loose. Along the way, they face many challenges and meet various characters who have different views on Anubis. Another plot could be that Anubis was sealed by an ancient and powerful ninja long ago. Now, in the present day, some dark forces are trying to unseal him to gain his power. The story could follow the heroes as they try to prevent this from happening and protect the world from Anubis' potential wrath.
In Naruto fanfiction, if Bast is sealed, it could be a creative and non - canonical plot device. It might be the author's way of introducing a new and unique element. Maybe Bast is a character from another mythology or a completely original creation in the fanfic world, and being sealed could be related to some powerful jutsu or ancient magic within the Naruto - inspired setting.
It might also make him more cautious in a way. Since Minato's power is now a part of him, he has to be careful not to misuse it or let it get out of control. So, he may take more time to think before acting, which is a change from his usually impulsive nature.
First, do some research on Hashirama and the Naruto universe in general. Know his powers, his relationships, and his significance in the story. Then, come up with a unique concept for the sealed Hashirama, like what the seal is for and who put it there.
It could introduce a new power dynamic. If Bast has certain abilities, the fact that it's sealed might create a situation where different factions in the Naruto fanfic are either trying to keep it sealed or release it for their own gain.
A third storyline might be about how Naruto's friends and the village react to this new development. Some might be afraid of the unknown power, while others, like Iruka or Kakashi, who knew Minato, could try to help Naruto understand and control this new aspect of himself. This could lead to new relationships and power dynamics within the village.