Obviously, Sasuke would be affected. Since it's a Sasusaku - related fanfic, any change in Sakura would impact their relationship. He might have to adjust to a more powerful Sakura, or he could be worried about the consequences of the seal breaking.
The other characters in the Naruto universe could also be affected. For example, Naruto. He might see Sakura in a new light and might have to re - evaluate their friendship. And the Akatsuki, if they are still around in the fanfic's timeline, could view Sakura as a new threat or a potential target for their own plans due to her new - found power from the broken seal.
Well, in such a fanfic, perhaps Sakura could gain new powers. With the seal breaking, she might be able to access a hidden reservoir of chakra. This could lead to her being more formidable in battle and changing the power dynamics within the Sasusaku relationship.
Sakura herself would be a main character for sure, as the whole story seems to revolve around her and the breaking of her seal.
The breaking of Sakura's seal in the fanfic could be the start of an epic adventure. She might have to go on a journey to find a way to control the new power or to reseal whatever was released. Along the way, she could meet new characters, both good and bad. She may also have to face her own inner demons as the power might be changing her in ways she doesn't fully understand yet. This could be a story of self - discovery and growth for Sakura.
Based on the title, the main characters are likely to be Sasuke and Sakura. Since it's a SasuSaku fanfic, they are usually the central focus.
The 'sakura yin seal fanfic' is likely a work of fanfiction. Since 'sakura' could refer to a name, often seen in Japanese - inspired fictional works, and the 'yin seal' might be a unique concept within that fictional world. It could revolve around a story where Sakura discovers or has some sort of connection with the yin seal. Maybe it's about her journey to understand the seal's true nature, her battles against those who want to misuse it, and her growth as a character through the experiences related to the yin seal.
Sakura could develop more empathy. By breaking Naruto's mask, she sees a side of him she didn't before. This might make her more understanding and less judgmental. For instance, if Naruto has been hiding his pain, Sakura's realization could soften her towards him.
I'm not entirely sure as I haven't read this specific fanfic. But generally, in SasuSaku (Sasuke and Sakura from Naruto) fanfics, it could be about some new adventure that breaks Sakura's seal and how that impacts her relationship with Sasuke and the overall story world.
Since it's a 'sakura memory seal fanfiction', it might have a main character who is on a quest to understand the mystery of the memory seal. There could also be an antagonist, perhaps someone who wants to use the memory seal for evil purposes. There could be a sidekick character as well, like a small spirit that lives among the sakura trees and helps the main character on their journey.
A fanfic could show Sakura sacrificing herself to save Sasuke. This would be a very emotional and heroic end for her. Sasuke would then have to live with the guilt and the memory of her selfless act.
Perhaps there is no traditional antagonist. Instead, Naruto's own insecurities could be the 'antagonist'. He's so used to wearing the mask of the happy - go - lucky guy that his inner self is resistant to being exposed. So, in a way, his own fear of change and vulnerability is what Sakura has to fight against when she tries to break his mask.