Definitely Obito. Since they have a long - standing connection, it would be interesting to see how their relationship played out during Kakashi's Anbu days. Maybe Obito was still alive and had his own secret missions within the Anbu that intersected with Kakashi's.
Anko could also be included. She has a wild personality, and her presence in the Anbu could create some interesting dynamics. She might be involved in some undercover work with Kakashi, and their different approaches to the mission could lead to both conflict and cooperation.
Yamato could be a great addition. He was also part of the Anbu at some point. He could be a junior member who looks up to Kakashi and learns a lot from him. Their interactions could be used to show different aspects of the Anbu's hierarchy and training methods.
Obviously, Sakura herself is a must - include. Then, characters like Kakashi could be involved as he has Anbu experience. Naruto and Sasuke might also make appearances, maybe Naruto trying to help Sakura in her Anbu - related adventures, and Sasuke being a bit of a wildcard. Additionally, some original Anbu characters could be created, like a veteran Anbu agent who becomes Sakura's mentor in the Anbu world.
In Anbu fanfiction, Kakashi is often depicted as a highly skilled and mysterious figure. His past experiences in Anbu shape his character, making him more reserved and calculative. Sakura, on the other hand, might be shown as growing in strength and independence while in the Anbu setting. She could be learning from Kakashi's expertise and trying to prove herself in this more dangerous and secretive organization.
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.
Their relationship in Anbu fanfiction can be really interesting. It could be a relationship of mutual respect. Kakashi respects Sakura's determination and Sakura respects Kakashi's skills and experience. They might work together on various Anbu missions, with Kakashi leading and Sakura following his lead at first. But as time goes on, Sakura could start to contribute more equally.
Well, Iruka - sensei could be a supporting character. He might check in on Naruto from time to time to see how he's doing under Kakashi. Tsunade could also play a role. Maybe she has some special tasks for Kakashi and Naruto as part of Naruto's apprenticeship. And then there are Naruto's other friends like Choji and Kiba. They could be involved in group training sessions or missions that are related to Naruto's training with Kakashi. For example, they could be the ones Naruto has to protect during a mission as a test of his skills learned from Kakashi.
In this fanfiction, the relationship between Team 7 and Anbu Kakashi could be a journey of mutual discovery. Kakashi would discover the unique qualities of each team member. For example, he might find Naruto's never - give - up attitude inspiring even in the harsh Anbu world. Sasuke's intense focus on revenge could remind him of some of the darker aspects of the Anbu. Sakura's growth as a kunoichi would make him proud. And Team 7 would learn about Kakashi's past in the Anbu, which would make them realize why he is the way he is. This would lead to a stronger bond between them, filled with understanding, respect, and a bit of mystery.
Obviously, Merlin himself. And Arthur could be in it too. Maybe Arthur doesn't initially recognize Tiny Merlin and there are some comical misunderstandings between them.
Kakashi could also be a great addition. As a mentor figure, he could guide Sakura in understanding and controlling her newfound powers from her rebirth. And then there are the villains. Orochimaru could be interested in Sakura's rebirth if he senses some new and powerful chakra within her. He might try to capture her for his own experiments.
Definitely Sasuke. His rivalry and later friendship with Naruto is a central part of the Naruto story. In a fanfiction about a Naruto force, Sasuke's skills and his unique Sharingan abilities would be very useful.
Iruka could be included. He was Naruto's first teacher and has his own connection to Kakashi. His presence can bring out the different teaching styles between him and Kakashi. Another good character is Jiraiya. His relationship with Naruto as his godfather and his connection to Kakashi through being comrades can add some interesting storylines.