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.
Maybe in the fanfiction, there's a mystery within the Anbu that Sakura and Kakashi have to solve. It could involve a traitor among their ranks. They start suspecting different members and as they dig deeper, they discover a conspiracy that goes far beyond what they initially thought. This could lead to some really tense and exciting scenes between them.
One idea could be that Sakura, as an Anbu, travels back in time and tries to prevent certain tragedies in Kakashi's past. Maybe she stops Obito from 'dying' initially, which would change the entire Naruto storyline in a major way.
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.
Their relationship could develop through mutual respect. As they work together on Anbu missions, they come to appreciate each other's strengths. For instance, Kakashi might admire Sakura's determination and her growth as a ninja, while Sakura could respect Kakashi's wisdom and combat experience.
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 plot could involve Sakura getting caught in a political intrigue within the Anbu that Itachi is also a part of. Itachi tries to keep Sakura out of it, but she's determined to uncover the truth. This leads to a series of events where they have to rely on each other's strengths and overcome their own weaknesses.
One idea could be that Sakura discovers a long - hidden Anbu mission related to her family. She then decides to join the Anbu to uncover the truth. Another could be that the Anbu has a secret training method that only Sakura can master due to her unique medical and combat skills. And perhaps there is a secret Anbu agent who has been secretly protecting Sakura all along, and she finally finds out.
One idea could be that Naruto joins the ANBU under Kakashi's strict training. He struggles to adapt to the ANBU's stealthy and often morally gray missions at first. For example, he might be conflicted when ordered to spy on a former ally. But with Kakashi's guidance, he learns to balance his ninja ideals with the demands of the ANBU.
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.
One idea could be Sakura exploring her unique family dynamic with Kakashi as her father. Maybe she inherits his ninja skills in an unexpected way.
Well, perhaps the child in the 'kakashi and sakura child fanfiction' gets involved in a mysterious mission that only they can solve because of their special heritage. The child could be the key to uniting two feuding ninja clans, using the influence of Kakashi and Sakura in the ninja world. Also, the story could focus on the child's relationship with their peers, who may be in awe or jealous of their powerful parents.