One popular 'betrayal naruto fanfiction' is where Sasuke's betrayal takes a different and more extreme turn. In some stories, he teams up with unexpected enemies against Konoha, which creates a whole new set of conflicts and power dynamics. Another one could be about Naruto being betrayed by his so - called friends in the village due to false accusations, leading him to question his loyalty to Konoha.
He could feel a great sense of anger and sadness. Naruto has a big heart, and being betrayed by someone he considered a friend or ally would be deeply hurtful. He might start to question his own judgment in trusting Mavis. And then, he would likely try to find out the reason behind the betrayal. He's not the type to just let it go. He would pursue the truth, whether it's to get revenge or to clear up any misunderstandings.
Naruto would probably be initially shocked. He always tries to see the good in people and would not expect such a thing from Mei. He might try to talk to her to understand why she did it.
At first, Naruto would probably be extremely shocked and in denial. He has always looked up to Kakashi as a mentor and friend, so the idea of being betrayed by him would be hard to accept immediately.
Naruto would probably be extremely hurt. He is someone who values friendship and trust deeply. So, he might initially be in shock and disbelief. He would likely feel angry too, but his anger might be mixed with sadness.
Sakura would be a likely candidate. She has a long - standing relationship with Naruto, so she could be part of the harem. Hinata is also a strong possibility as she has deep feelings for Naruto. And Ino, who has known Naruto for a long time and has her own charm, could also be in the harem.
Naruto himself could be a victim of family betrayal. His father Minato or mother Kushina might be involved in some alternate - universe plot where they turn against him for some dark reason. Sasuke's family is also a likely candidate. Itachi's actions could be re - imagined in a way where his real motives are more about betrayal of the Uchiha family rather than protecting it. And Hinata's family might be involved too, like if Neji, before his death, was made to betray the Hyuga family in some fan - created scenario.
One common plotline could be a family member being influenced by an enemy. For example, a relative might be controlled by Orochimaru and turn against the family. Another could be a misunderstanding within the family. Maybe Naruto is wrongly accused of something by his family and they turn their backs on him. There could also be a power - hungry family member who betrays the family to gain more power or status in the ninja world.
The fanfiction could involve a secret mission. Let's say Naruto and Akeno are on a mission together for the greater good. But Akeno discovers that Naruto has a hidden agenda that goes against what she believes is right. This would make her feel betrayed by Naruto. Or vice versa, if Naruto finds out that Akeno has been using him as a pawn for her own goals, which she has been hiding from him all along.
If Naruto's friends or loved ones are threatened by the ANBU, either directly or indirectly. For instance, if the ANBU's actions put Sakura or Kakashi in danger without just cause, Naruto would be likely to turn against them. He's very loyal to his friends, and any threat to them would be a strong motivation for him to take action against the ANBU.