Naruto's power might also be affected. If he was betrayed, he could lose the will to fight or train. He might even start to doubt his own purpose. This could lead to a decline in his abilities, which in turn could put the village at risk if he was its main protector.
The Ministry of Magic could also be the main antagonist in this case. If the Ministry is corrupted or under the influence of dark forces, they could manipulate Harry's friends. They might convince his friends that Harry is a danger to the wizarding world order, and his friends, being naive or misinformed, end up betraying him.
In such a fanfiction, perhaps Harry's friends are jealous of his newfound powers or popularity within the wizarding world. So they spread rumors about him being untrustworthy. As a result, Harry is shunned by many in the community. He has to embark on a solo journey to prove his innocence and in the process discovers who his true friends really are.
In a fanfiction where Naruto is betrayed by his friends, it could start with jealousy. Suppose Naruto gets a great power or a special recognition. His friends, feeling overshadowed, might be tricked by an evil force into thinking Naruto is using them. So they betray him, which makes Naruto realize that he has to rely on his own strength and find new allies who truly understand him.
Sometimes in fanfictions, character development takes a dark turn. The friends might have their own personal goals that conflict with Naruto's. They could see Naruto as an obstacle to achieving those goals. Or perhaps there was a long - hidden secret that came to light, which made them change their attitude towards Naruto, leading to the so - called betrayal.
Allow yourself to feel the pain at first. It's natural. But don't let it consume you. Try to forgive the person, not for their sake but for your own peace of mind. However, forgiveness doesn't mean you have to be friends with them again. Look at the situation as a learning experience. In those 'betrayed by friends stories', the people who were betrayed can use this to become more cautious in future friendships. They can learn to set boundaries better and not be so trusting right away.
First of all, his friends would likely be very curious. Since Naruto has had a rather eventful childhood, the fanfiction could contain a lot of personal elements. They might be amused by his childish handwriting or the simple way he used to express his ideas. Some might even be touched if the fanfiction reveals Naruto's hidden insecurities or hopes from back then. It could also lead to his friends having a new perspective on Naruto, seeing a side of him that they didn't know before.
The story could go like this. Percy's friends are influenced by a false rumor about him. They start to avoid him and eventually turn on him. Percy, who has always been loyal to them, is devastated. He has to figure out how to clear his name while also dealing with the pain of their betrayal. Along the way, he might meet new allies who help him through this difficult time and show him that not all people are like his former friends.
At first, Harry would be in disbelief. He would think it was some sort of joke or misunderstanding. But as the reality sets in, he would become a bit of a loner. He'd still have his sense of right and wrong, so he might continue to fight against the dark forces on his own, all the while hoping that his friends would come to their senses and realize they made a huge mistake in betraying him.