Perhaps a powerful ninja from another village who has a vendetta against Konoha and the ANBU. They see the ANBU's connection with Naruto as a threat and use their knowledge of the lemon fanfiction element in some way. For example, they might create clones that are disguised as lemon - scented ANBU members to infiltrate Konoha and cause chaos.
It could be Orochimaru. He has always been interested in Sasuke and might target ANBU Team 7 to get to him. Orochimaru's experiments and his desire for power make him a formidable and menacing villain. He could also be using some new jutsu or have created more powerful minions to fight against Team 7.
A new character could be created as the main villain. Maybe a rogue ANBU agent who was once a friend of Naruto and Sasuke but has been corrupted by power. This character would know all the ins and outs of the ANBU, making it very difficult for Naruto and Sasuke to stop him as he tries to take over the ninja villages using the secrets he learned while in the ANBU.
Perhaps a powerful and unknown shinobi from a far - off land. This shinobi has heard of Team 7's reputation and sees them as a threat to his plans of world domination. He uses his unique and mysterious jutsu to challenge Team 7 at every turn, and they have to figure out his motives and weaknesses to stop him.
In this kind of fanfiction, Naruto might face some really tough and secretive missions in ANBU. He could be trained in new and deadly ninja techniques. Maybe he would also form some unexpected alliances with other ANBU members, learning from their different skills and experiences.
One interesting plot could be Naruto being secretly trained by an ANBU member in a special jutsu. The ANBU, with a lemon - themed mask perhaps, imparts unique skills to Naruto that set him on a new path of power. This could involve Naruto learning stealth techniques and how to use his chakra in more refined ways.
Obviously, Naruto is one of the main characters. He brings his own set of skills, values, and personality to the ANBU setting. Another main character could be Kakashi. Since he has experience in ANBU and also has a connection with Naruto, he could play an important role in guiding Naruto or being involved in the same missions.
Finding good Naruto Anbu Lemon fanfiction writers can be a bit of a hunt. One way is to ask in Naruto - related forums. There might be fans who are really into this type of fanfiction and can recommend their favorite writers. Another option is to look for writers who have a consistent style and good grammar in their stories. When you read a Naruto Anbu Lemon fanfiction that you enjoy, make a note of the writer's name so you can check out their other works. They may have a whole collection of great stories in this genre.
Naruto may become more serious and stealthy. ANBU work requires a certain level of secrecy and discipline, which could tone down his usual exuberant personality.
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.
In addition to the ANBU, sometimes other Naruto characters play important roles. Naruto himself might cross paths with the ANBU in some fanfictions. His positive and determined attitude could influence the ANBU members. Or perhaps villains from the Naruto world might target the ANBU, making them the main antagonists in the story. So, it really depends on the specific fanfiction.