She might learn some advanced jutsu. For example, Kakashi could teach her his famous Chidori, which is a very powerful lightning - style jutsu. This would significantly enhance Sakura's combat abilities.
It could make her more confident. With Kakashi's guidance, she would gain more skills and knowledge, which would boost her self - assurance in battles and in general ninja life.
I'm not sure specifically which 'kakashi trains sakura fanfiction' is the best. But if you search on popular fanfic sites, you might find some. It could be interesting to see how different authors imagine Kakashi passing on his knowledge and skills to Sakura. Maybe in some, he's strict and in others, more lenient.
He might learn some advanced chakra control techniques. For example, better management of his Nine - Tails chakra. Kakashi, being a skilled ninja, could teach Naruto how to blend his own chakra with the Nine - Tails' more effectively, which would enhance his combat abilities.
Kakashi's training style, which is often strict and methodical, would likely make Naruto more disciplined. Naruto is usually a bit of a wild card, but under Kakashi's tutelage, he would have to follow a set routine and be more precise in his actions.
She probably changes in her mindset. Itachi's influence might make her think more strategically. Instead of just relying on brute force or basic medical ninjutsu, she could start to analyze situations better and come up with more effective solutions. For instance, she might learn from Itachi how to anticipate an opponent's moves based on their body language and chakra flow.
Sakura could also be present. She might be observing the training and learning some things herself, or she could be helping Kakashi in some way, like providing medical support during intense training exercises.
One great 'Trains Sakura' fanfiction is 'The Sakura Express'. It's about a magical train journey through a land filled with sakura trees. The story beautifully combines the imagery of the trains and the sakura blossoms, creating a really enchanting world. The characters are well - developed, and you can really feel their emotions as they travel on this special train.
There are some great Anko and Sakura fanfictions out there. One interesting one might be where Anko trains Sakura in some unique ninja skills that Sakura hadn't learned before. It could involve Anko teaching Sakura about the more unorthodox and stealthy aspects of being a ninja. Another could focus on the development of their relationship during the training, perhaps starting as a strict teacher - student dynamic and evolving into a friendship.