Naruto's anger can inspire other characters. When they see how passionate he is about a certain cause due to his anger, they might be motivated to join him. For example, if he's angry about the mistreatment of a group of people, his anger can inspire his friends to fight for justice alongside him.
On the other hand, Naruto's anger could also be a wake - up call for Boruto. If Boruto respects his father, seeing Naruto angry might make him realize his mistakes and try to change his ways, which could ultimately strengthen their relationship as they work through the issues.
It could strain their friendship. Naruto might start avoiding Sakura, which would make her realize she's done something wrong and try to fix it.
It can create a lot of tension. For instance, Harry might start to act independently, which could lead to unforeseen consequences. He could go off on his own missions, putting himself in more danger than if he were with the Order.
His anger might cause a strain in his relationship with his friends at first. They may not understand why he is so angry and feel hurt by his sudden change in attitude. For example, Sasuke might be confused by Naruto's anger towards Konoha as he has his own complex feelings about the village.
His anger could lead to a complete breakdown of their relationship in some fanfictions. Naruto might feel so betrayed or frustrated that he decides he doesn't want to be around Sakura anymore. But in other fanfictions, it could be a turning point for their relationship. Naruto's anger might make Sakura see him in a new light, as someone who has his own boundaries and feelings, and she might start to respect him more, which could improve their relationship.
It can create a sense of urgency. For example, his friends and allies will then have to step up to protect him while he is unconscious. This could lead to new character developments as they face challenges without Naruto's immediate help.
Their relationship could become strained. Ginny might start to question her love for Harry. In some fanfics, she could even consider leaving him. This would put a lot of pressure on Harry to fix things and make amends.
It can create more conflict. His mental instability might make him unpredictable, causing his friends to be unsure how to deal with him. This could lead to internal strife within the group.
His prodigy status can speed up the plot. Since he can master things quickly, he might reach high - level battles or important events faster.
It can introduce new conflicts. For example, the Uzukage might have had unresolved issues with other villages or clans, and now Naruto has to face them as the reincarnation. This can completely change the direction of the plot from the original Naruto story.