Maybe the ANBU who raise Naruto are actually part of a secret group within the ANBU that has its own agenda. They could be training Naruto to be a weapon against a hidden threat in the shinobi world. As a result, Naruto's journey would be about uncovering this conspiracy while also dealing with the fact that his upbringing has made him an outcast among the regular shinobi. For example, he might be too brutal in his fighting style for the more traditional ninja.
In this fanfic, Naruto's relationship with the other villagers might be quite different. Since he is raised by the ANBU Commander, he may be more isolated from the general populace at first. However, as he grows, his skills and the influence of the ANBU could lead to him being respected in a different way. Maybe he would form a special team within the ANBU itself rather than the normal genin teams.
One possible plot twist could be that the ANBU who raise Naruto secretly train him in forbidden jutsu. This would set Naruto on a path that's different from the original story. He might face more opposition from the village elders who discover this, but it could also make him a more formidable ninja earlier on.
He would be highly skilled in combat from a young age. The ANBU Commander would train him rigorously, so Naruto could be a prodigy in various ninja arts. His fighting style might be more calculated and less reliant on brute force and the Nine - Tails' power. He would have a better understanding of strategy and tactics.
Naruto's personality would likely be more disciplined. ANBU are highly disciplined soldiers. So, he would be less likely to act impulsively. Instead of jumping into situations without thinking, he would analyze first. However, he might also lack some of the warmth that comes from his normal upbringing. He might have a harder time making friends because he's been raised in a more austere environment. For example, he might not be as quick to forgive as he was in the original story, as the ANBU way is more about justice and less about second chances.
His relationship with Sasuke would be very different. Since Naruto is raised by ANBU, he might be more competitive with Sasuke in a cold, calculating way. Instead of the friendly rivalry in the original, it could be a more intense battle of skills. Naruto might not be as open to befriending Sasuke, seeing him as a potential threat to his own goals and the secrets he has been taught by the ANBU.
Naruto's adaptation to the Anbu in this fanfiction could be a complex process. At first, he'd probably struggle with the strict discipline and the need for secrecy. But his previous experiences in tough situations would come in handy. He'd gradually understand the importance of stealth and how to use his skills in a more covert way. He might also learn from the more experienced Anbu members, and his own determination would drive him to become a valuable part of the Anbu.
One interesting storyline could be Sakura joining the Anbu and having to prove herself among the male - dominated group. She might face challenges like secrecy requirements and intense training, all while Naruto is on his own journey, and their paths cross in unexpected ways during missions.
These fanfictions often have a darker and more serious tone compared to the regular Naruto story. Since the Anbu deal with dangerous and often covert missions, there are more high - stakes situations. For example, Naruto might have to make tough decisions that go against his usual moral code in order to complete a mission. Also, they usually explore Naruto's relationships with other Anbu members in depth, like how he forms new alliances or rivalries within the organization.
Some of the more hot - headed ANBU members might overreact and assume Naruto is a threat to the village. They could try to use force to get the stolen item back. However, the more level - headed ones might try to figure out Naruto's motives first. They might consider that Naruto could have a good reason for what he did, like if he thought the item was being misused by the ANBU.