Maybe the main plot is about how Kakashi, in his ANBU role, has to balance his duties with his growing friendship or respect for Kushina. Her pregnancy could be a symbol of new hope in the village, but there are those who oppose it. Kakashi has to fight against these opposing forces, both physical and ideological, all while Kushina is going through the physical and emotional journey of pregnancy.
One possible scenario in such a fanfiction could be that Kakashi, while in ANBU, is assigned to protect Kushina during her pregnancy. He might have to deal with various threats against her and the unborn child. This could lead to some intense action scenes and also some character - development moments for Kakashi as he realizes the importance of protecting new life.
One idea could be exploring Kakashi's relationships within the Anbu. For example, his friendships or rivalries with other members. Maybe there was a particular mission where he had to rely on a teammate he didn't trust at first.
The plot could involve Sakura finding a mysterious artifact related to Kakashi's ANBU days. As she tries to figure out its significance, she has to seek Kakashi's help. This brings them closer as they explore the secrets of his past together.
Well, Kakashi could train Naruto in combat skills specific to ANBU missions. This would include more lethal and precise attacks. He might also teach Naruto how to use different types of weapons that are common in ANBU operations. Maybe Kakashi would set up mock battles where Naruto has to face multiple opponents at once, just like in real ANBU scenarios.
Perhaps a story where Kakashi's past Anbu experiences resurface during a mission with Naruto in the Anbu. They have to deal with an old enemy that Kakashi thought was long gone, and Naruto helps him come to terms with his past traumas.
A possible plot could be that Team Minato is sent to investigate some strange occurrences. Anbu Kakashi is already on the case. When they meet, there's a bit of a clash in their approaches at first. Minato's team is used to working together in a certain way, while Kakashi has been trained in the more secretive and solitary Anbu style. However, as they face different challenges during their mission, they gradually come to respect each other's methods and work together effectively to solve the mystery.
One idea could be that Sakura and Kakashi are on an Anbu mission together and they encounter a powerful enemy that requires them to combine their skills in new and unexpected ways. For example, Sakura's medical ninjutsu could be used not just for healing but also to enhance Kakashi's Sharingan abilities temporarily.
Well, it could start with Naruto and Kakashi realizing they have a special bond that goes beyond their normal relationship. They decide to get married in secret. As the story progresses, they might face difficulties like how to handle their different responsibilities in the village. Naruto is still young and has his own dreams and goals, while Kakashi is an experienced ninja with his own set of duties. Also, they would have to be careful not to let their secret slip, especially around people like Tsunade who might not approve. Their marriage could also be a source of strength for them, as they support each other through various ninja missions and personal struggles.
One common theme is power adaptation. Since Kakashi is from the ANBU, he has a certain set of skills. In crossovers, he has to adjust these skills to fit the new world he's in. For example, if he crosses into a world with magic, he might need to figure out how his ninja techniques work with the new magic system.
One common theme is loyalty. In the ANBU, loyalty to the village is of utmost importance. Fanfictions often explore how Naruto and Kakashi uphold or struggle with this loyalty. For example, they might face a situation where their loyalty to each other conflicts with their loyalty to the village.