To create a fictional nation, start by envisioning its location and physical features. Next, establish a set of laws, government structure, and social hierarchies. Don't forget to create a mythology or origin story for it to add depth.
Well, the story might involve the spy's adventures as they navigate through the complex politics and strange customs of Pottsylvania, facing various challenges and enemies along the way.
To create a fictional nation, you have to consider aspects like its location, population, economy, and political system. I think you need at least 10-15 key elements for it to seem realistic.
Madara Uchiha could also be a likely cause. If he somehow managed to return or had a long - planned scheme that involved breaking Naruto's sanity. He was a very powerful and devious foe who could use his knowledge of the ninja world and its powers to target Naruto's mental stability.
It depends on your perspective. To some extent, Pecola shows signs of mental instability at the end, but it's also a reflection of the harsh circumstances she's been through and the lack of support around her.
No, Betty isn't insane. She's often shown as a kind, friendly, and sensible person in the comic series. Her actions and behaviors are typical of a normal character.
The Akatsuki as a whole could be the opponents. Imagine Naruto facing multiple Akatsuki members at once in a fight. The combined threat of their different powers and their goals of capturing the tailed beasts could be overwhelming for Naruto. They might use underhanded tactics, like threatening to kill captives or using mind - control techniques on Naruto's friends. All of these things could make Naruto go insane as he battles against them, trying to protect what he loves.