His training and newfound knowledge play a role too. He could discover ancient ninja scrolls or be trained by a hermit. This might lead to him learning new jutsus or improving his existing ones. For example, he could master a more powerful form of the Chidori that can cut through almost anything. Also, his physical strength and speed could be increased through special training regimens.
Well, it's popular because both Naruto and Kakashi are beloved characters. People like to see their relationship explored deeper. Kakashi is a respected and skilled ninja, and when he shows favoritism towards Naruto, it gives Naruto a boost that fans enjoy seeing. It's like a 'chosen one' kind of story within the Naruto universe.
One good 'strong naruto kakashi favoritism' fanfiction could be 'Naruto's Hidden Strength Under Kakashi's Guidance'. In this fic, Naruto is shown to have extraordinary growth under Kakashi's special training and mentorship. Kakashi focuses a great deal on Naruto, believing in his potential more than others, which leads to Naruto achieving great power early on.
There's 'Kakashi's Ascent'. Here, Kakashi's strength is boosted through intense training in a secret realm. He gains the ability to control all five elements with ease, not just his natural Lightning element. This makes him a formidable force against any opponent, as he can counter any elemental jutsu with his own. He also has an increased chakra reserve, which means he can use powerful jutsus continuously.
Sure. 'Fem Naruto's New Journey with Kakashi' has a really strong plot. It involves a mystery that they have to solve together. The plot keeps you on your toes as they encounter various obstacles and enemies along the way.
Another reason could be that some fans are simply more interested in seeing a super - strong Naruto and in order to make that more plausible, they put down Kakashi. They might think that Kakashi's teaching was not enough to bring out the best in Naruto and by bashing him in fanfiction, they can create a narrative where Naruto reaches his full potential faster and in a more spectacular way.
Well, one that comes to mind might be 'Naruto's Ascent'. In this fanfic, Naruto is made super strong early on and Kakashi is sort of sidelined and criticized for his teaching methods which are shown as ineffective. Another could be 'The New Path of Naruto' where Naruto discovers a new power source and Kakashi's role as a guide is bashed as he fails to recognize Naruto's true potential.
Kakashi might be initially surprised. But then, he would probably use it as a teaching moment for Naruto. He could say something like 'Naruto, stealing is not the way of a ninja.' And then give him a punishment like extra training.
Kakashi could use his Sharingan to analyze Obito's moves and find a weakness in his defenses. Since he has the Sharingan, he might be able to predict Obito's attacks and counter them effectively, eventually finding an opportunity to break free.
Kakashi's reaction would be complex. He is a man who has lost many people in his life. But Naruto was special. He would hold Naruto tightly, his hands trembling slightly. He might try to use some of his own chakra to keep Naruto alive a little longer, but deep down he knows it's futile. His face would show a mixture of pain, regret, and love. He would remember all the times he trained Naruto, all the lessons he taught him, and how Naruto had surpassed all expectations.