If Naruto were brainwashed by Danzo in a fanfic, he'd probably start following Danzo's extreme ideology. Danzo was known for his underhanded methods, so Naruto could be influenced to do things like suppress certain clans or individuals. His personality would change drastically. Instead of being the optimistic and friendly Naruto we know, he'd become cold and calculating, much like how Danzo was. This would be a huge shock to the other characters in the Naruto universe.
Well, in such a fanfic, Naruto might turn against his friends. He could be made to use his power for Danzo's often shady purposes. For example, he might be forced to target those Danzo sees as threats to Konoha in a more brutal way than he normally would. His relationships would be severely damaged as his friends would be confused and likely try to stop him, not realizing he's been brainwashed at first.
In a fanfic where Naruto is brainwashed by Danzo, it could lead to a dark turn in the story. Naruto's actions would no longer be guided by his own beliefs of friendship and protecting everyone. He might be used to eliminate opposition within Konoha. His friends, like Sasuke and Sakura, would surely try to break the brainwashing. They'd have to face a Naruto who has all his power but is being misdirected. It could create a lot of conflict, both internal within Naruto as he struggles against the brainwashing subconsciously, and external as his friends fight to save him.
In a Naruto fanfic where Mikoto is brainwashed, she could be made to do things against her normal nature. For example, she might be forced to fight against her friends or family. Maybe she'll be used as a tool by the villains in the fanfic's plot to gain some advantage over the other characters. It really depends on the creativity of the fanfic writer.
Well, if Naruto was trained by Danzo, he might be more ruthless at first. But joining Team 7 could soften him up. He'd probably bring some of Danzo's combat techniques and secrecy to the team. It could make for an interesting dynamic, with Naruto being a bit more of an enigma compared to his canon self.
Well, if Naruto was trained by Danzo in fanfiction, it would be a huge departure from his normal growth. Naruto is all about hope and friendship. But under Danzo's tutelage, he could be molded into a more cynical shinobi. His jutsu might develop in different directions. For example, he could be pushed to learn more dangerous and morally ambiguous ninjutsu. Also, his relationships with his friends might change as he becomes more secretive and less open - hearted due to Danzo's influence.
In such a fanfiction, Naruto might become a more shadowy and ruthless ninja. Danzo's training methods are often extreme and focused on loyalty to the village above all else. Naruto could lose some of his idealism and become more of a tool for Danzo's political games.
It could also be due to Naruto's outcast status in the village initially. Danzo might think that banishing Naruto would be an easy decision as Naruto doesn't have many supporters at first. He might believe that by getting rid of Naruto, he can maintain the status quo in the village and prevent any disruptions that Naruto's presence might cause in the future.
Naruto is a likely candidate. Given his importance in the series, a plot where he is brainwashed can create a huge impact. His powerful chakra and his role as the main character mean that if he is brainwashed, it can change the entire dynamic of the story. The enemy could use his strength against his own friends and village.
In a fanfic where Danzo gives Naruto the Sharingan, it could lead to a very different Naruto. Naruto might gain new abilities and a new perspective on the Uchiha. He could potentially master the Sharingan quickly with his strong willpower, but he would also have to deal with the dark side of the Sharingan, like the curse of hatred that often comes with it.
There's a fanfic where Danzo tries to manipulate Naruto for his own political gain. However, Naruto, being the perceptive character he is, quickly catches on. This leads to a battle of wits between them. In the end, Naruto uses his own brand of talk - no - jutsu to make Danzo see the error of his ways and they end up working together to reform the village's political system.
Well, without actually reading the fanfic, it's hard to say exactly. But generally, it might be about Kushina being brainwashed in a Naruto - related fictional scenario. It could involve changes in her relationships, her role in the Naruto world, or how her actions impact other characters.
Naruto would become much more powerful. The Sharingan could give him an edge in battles, allowing him to copy jutsu more easily. He might be able to use it to analyze his opponents faster. However, he would also have to deal with the negative aspects of the Sharingan, such as the potential strain on his eyes and the risk of overusing it.