In this kind of fanfiction, one possible plot development could be Naruto having to deal with the secrecy aspect of ANBU. He might struggle with the morally grey missions they undertake. For example, he could be sent to spy on an old acquaintance. Naruto, being Naruto, might try to find a more positive solution to the situation rather than blindly following orders.
His character could change in several ways. Firstly, he'd likely become more stealthy. In the ANBU, being able to move without being detected is crucial. Also, he might become more cynical. The ANBU deals with some dark stuff, and that could make Naruto question the world around him more. He may still hold onto his core values of protecting his friends and the village, but he'd view things from a more jaded perspective. He'd also have to be more calculating in his actions, thinking several steps ahead like the other ANBU members.
Kakashi is often a popular character in Naruto Anbu Black Ops fanfiction. His cool and mysterious nature during his Anbu days makes him an interesting subject. Writers like to explore his past missions and his relationships with other Anbu members.
It could be Kakashi. He has a lot of experience and a mysterious past that would fit well with the Anbu Black Ops setting. His Sharingan would give him an edge in their dangerous missions.
One interesting Naruto Anbu Black Ops fanfiction could be one where a new character is introduced into the Anbu and has to deal with the secrecy and danger. For example, a story where this new Anbu member discovers a hidden plot within the organization itself.
Typically, in hinata anbu black ops fanfiction, Hinata is often portrayed as more stealthy and powerful. Her Byakugan abilities are enhanced and used in more strategic ways for Anbu missions.
Maybe an Anbu agent who has a special ability that no one in the village knows about. He or she is sent on a mission related to Orochimaru. During the mission, the agent starts to question the morality of the Anbu's actions as they often involve killing without trial. This could lead to a character - driven story about loyalty, morality, and self - discovery.
In some fanfictions, Naruto might join Anbu because of Sakura to prove himself worthy of her. Maybe he thinks that by becoming an elite Anbu member, he can show her that he's strong and reliable.
Itachi Uchiha is another great character to feature. His complex motives and his role in the Uchiha massacre while being in the ANBU make for a lot of interesting story possibilities. You could write about his internal struggles and how his time in the ANBU influenced his decisions.
One idea could be exploring the backstories of individual ANBU members. For example, creating a story about an ANBU who has to face a past enemy while on a mission. Another could be a story where an ANBU trainee struggles to meet the strict requirements of the organization.