He could also feel a great sense of disappointment. Naruto has fought hard for the unity of the ninja world, and Mei's betrayal would be a huge setback. He might go into a bit of a depression at first but then would likely try to find a way to clear his name and fix the situation.
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.
Naruto would likely be angry as well. Despite his forgiving nature, being betrayed is not something he would take lightly. He might start investigating on his own to find out the real reason behind Mei's actions and at the same time, prepare himself to defend against any further attacks or false accusations from Mei and those she might have influenced.
Naruto would be deeply hurt by the betrayal. He has a big heart and values his relationships. He would feel confused as to why Serafall would turn on him. This might cause him to question his own judgment in trusting people. But being Naruto, he would not let this break him. He would rise above it, perhaps trying to talk to Serafall to clear up any misunderstandings. If that fails, he would focus on his own path, becoming stronger both physically and mentally, all while still holding out a little hope that things could be set right between them in the future.
After the initial shock, Naruto could become determined to prove his innocence if that was the case. He's a fighter, and he wouldn't just let this false accusation or betrayal stand. He might set out on a journey to find the truth and clear his name, all while struggling with the pain of his friends' actions.
Naruto would likely be extremely hurt at first. He values loyalty highly, and this betrayal would be a big blow to him. He might go into a state of shock and disbelief.
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.
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.
He could also feel angry. After all, he has fought for his friends and the village. To be betrayed by someone like Sirzechs would make him want to prove his innocence. He might start training even harder to show that he is not the bad guy Sirzechs is making him out to be. And he would likely try to find evidence to clear his name.
Naruto would be extremely hurt. He's a very emotional person who values friendship deeply. He'd probably first try to understand why Yugao did it. He might be in denial at first, thinking it's some kind of misunderstanding.
Naruto would be determined to get to the bottom of it. He would not just accept the betrayal at face value. He would use his skills and the help of his friends to investigate what made Jiraiya turn against him. Naruto's ninja way is about never giving up, and this situation would be no different. He would fight against this betrayal, both physically if Jiraiya became an enemy in combat, and emotionally, trying to understand the reasons behind it all while still holding on to the hope that Jiraiya could be redeemed.
Naruto would probably be extremely hurt. He has always looked up to the Sandaime as a grandfather figure. So, he might initially go into a state of shock and disbelief.