It could be a rogue hunter nin who doesn't like the idea of Naruto, an outsider, joining their ranks. This rogue hunter nin might see Naruto as a threat to their power and influence within the group.
One possible plot could be that Naruto, seeking new challenges and ways to grow stronger, decides to join the hunter nin. He might bring his unique ninja skills from Konoha, like his shadow clones. His positive attitude could start to change the somewhat secretive and often dark hunter nin culture. He could also make new friends and enemies within the hunter nin ranks.
Danzo could be a great antagonist. He always had his own secretive and often unethical plans. He might see Naruto as a threat even if he's innocent and frame him as a missing - nin to get rid of him.
Perhaps an old enemy of one of the members of Team 9 shows up. Since Naruto has joined the team, they might see it as an opportunity to get revenge. This antagonist could be someone who was once defeated by the member's family and now wants to prove themselves. They would be very cunning and use their knowledge of the team member's past to try and divide the team.
It could be an old enemy who has resurfaced, like Orochimaru again. Since Naruto and Sasuke are together now, Orochimaru might see them as a threat to his own plans for power and immortality.
In 'naruto hunter nin fanfiction', the theme of identity is quite common. Hunter nins often have to hide their true identities, and this can lead to stories about self - discovery and acceptance. Another theme is the struggle against corruption. Sometimes, within the system of the village, there are corrupt elements that the hunter nins have to deal with. And, the theme of friendship and camaraderie also exists, as they form bonds with other ninjas, both hunter nins and regular ones, during their adventures.
Well, common themes in 'naruto is a hunter nin fanfiction' include transformation. Naruto's transformation into a hunter nin is not just about a change in job title. It's about a complete overhaul of his ninja identity. This includes changes in his fighting style, his relationships with others, and his understanding of the ninja world. Another theme is mystery. Hunter nins are often associated with mystery, and Naruto in these fanfictions has to deal with all kinds of mysterious events and characters. There's also the theme of redemption in some cases, where Naruto uses his new role as a hunter nin to make up for past mistakes or the mistakes of others.
Orochimaru would likely be a main antagonist even if Naruto joins the Sound Village. Orochimaru has his own devious plans, and Naruto might not fully agree with them. Even though Naruto is in the village, Orochimaru could try to use Naruto for his own gain, like getting access to the Nine - Tails' power. So, Naruto would constantly be at odds with Orochimaru.
It could be the leader of the dark guild. This person would likely have a very different ideology from Naruto's. Maybe the leader believes in using extreme and unethical means to gain power, like sacrificing innocent lives for dark magic. Naruto would constantly clash with this leader as he tries to uphold his own values.
Orochimaru could still be the main antagonist. Even if Naruto joins Team Hebi, Orochimaru's motives are often self - serving and evil. He might be using the team for his own experiments or to gain power, and Naruto would oppose that. Naruto's presence in the team could disrupt Orochimaru's plans, leading to a conflict between them.
Archive of Our Own (AO3) is also a great place to look for hunter nin Naruto fanfiction. It has a wide range of stories, and the tagging system makes it simple to find exactly what you're interested in. Plus, the community there is quite active, and you can even interact with the authors if you want.