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.
Brainwashed Mikoto can have a huge impact on the plot. She could be used to start conflicts. For example, if she attacks other characters without reason due to the brainwashing, it would lead to battles and new rivalries.
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.
No, it's probably not popular. A good Naruto fanfic usually has a title that is both appealing and in line with the values of the Naruto community. This title contains a derogatory word which would likely turn off many readers, so it's not likely to gain much popularity.
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.
One idea could be that Mikoto discovers baby Naruto alone and decides to take him in and protect him, raising him alongside Sasuke. This could lead to a very different dynamic in the Uchiha clan and Naruto's growth.
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.
A 'naruto mikoto lemon fanfic' often has a blend of the Naruto universe's elements with the relationship between Naruto and Mikoto. The fanfic may include the use of jutsus, ninja clans, and the overall world - building of Naruto. Regarding the 'lemon' part, it usually means there will be some level of romantic or sensual undertones, which could be used to develop the emotional connection between the two characters. However, different authors will have different takes on how much and how they portray this aspect.
One idea could be a story about Kushina and Mikoto being friends when they were young and how their friendship influenced Naruto's life. For example, they could have made a pact to always look out for each other's children. Kushina might have told Mikoto some special Uzumaki techniques that Mikoto then passed on to Sasuke in a way. Another idea is a time - travel fanfic where Naruto goes back in time and meets his mother Kushina and Mikoto when they were in their prime. He could learn a lot about the past of the village and his family from them directly.
Since the title seems a bit unorthodox, it's hard to tell precisely. But if we assume it's a regular Naruto fanfic with Mikoto in it, it might explore aspects of Mikoto's character that were not fully explored in the original Naruto series. It could be about her backstory, her relationships with other characters, or her role in some new plotline within the Naruto world.