Naruto might initially be in shock and disbelief. He has always been loyal to the village, so being imprisoned for no real reason would be a huge blow. He would probably start by trying to reason with his captors, explaining that he is innocent. For example, he might say things like 'I've always protected this village, why would I do what you're accusing me of?'
There could be new characters created specifically for this fanfiction. Maybe a fellow prisoner who has some special knowledge or ability that helps Naruto during his imprisonment. Or a mysterious figure who is behind Naruto's false imprisonment, pulling the strings from the shadows.
In this fanfiction, Naruto might endure the false imprisonment with dignity at first. Then, as his godlike abilities start to surface, he could use them to not only free himself but also to reform the prison system if it's corrupt. He could use his power to expose the false accusations and bring justice to those who wronged him.
One possible reason could be a conspiracy within the village. Maybe some powerful and corrupt individuals in the Hidden Leaf want to get rid of Naruto for their own gains. They might frame him for a serious crime like treason or murder to eliminate his influence as a hero. Another reason could be a misunderstanding. For example, Naruto might be in the wrong place at the wrong time and there are false witnesses who claim he committed a crime he didn't. Or perhaps an enemy from outside the village has managed to create a false scenario that makes it look like Naruto is guilty in order to cause chaos within the Leaf Village.
He could also be more resigned in some fanfictions. He might think about his past and how he's always been an outcast in a way, and see this imprisonment as just another hurdle. So, he would bide his time, waiting for a chance to prove his innocence.
One possible reason could be that he is framed for a crime he didn't commit. Maybe someone with a vendetta against him planted false evidence to make it seem like he attacked a village or something similar.
There's a 'izuku falsely accused fanfiction' where Izuku is accused of cheating during an exam at school. The story delves deep into how his classmates initially turn against him, but then slowly start to realize that there might be more to the story. It really plays on the emotions of the characters and readers alike.
If you want to find more 'izuku falsely accused fanfiction', you can try using Google. Type in something like 'izuku falsely accused fanfiction recommendations'. This might lead you to blogs or websites that review or recommend such fanfictions. Additionally, keep an eye on the works of authors who are known for writing My Hero Academia fanfiction. They might have written a story about Izuku being falsely accused at some point.
She usually reacts with determination. Hermione is a strong - willed character. So, she immediately starts looking for evidence to prove her innocence. For example, in many fanfictions, she'll start by retracing her steps and making lists of who could have possibly framed her.