In such fanfiction, the Kakashi OC often has unique physical features. For example, they might have distinct hair color or eye shape that sets them apart.
Well, one similarity could be their determination. In the fanfic, like in the original series, both Naruto and Kakashi are very determined. Naruto is always striving to become Hokage and Kakashi has his own goals and missions he's dedicated to. They also might share similar combat styles in the fanfic, perhaps Naruto starts to adopt some of Kakashi's strategic thinking during battles.
One possible motive could be to help Naruto control the Nine - Tails' chakra better. Hypnosis might be a way to reach into Naruto's subconscious and find a way to coexist with the powerful force inside him.
Kakashi has a very sad story. He lost his father at a young age. His father was a great ninja but was shamed and ultimately took his own life. Then, Kakashi lost his comrades during a mission. His friend Obito 'died' right in front of him while giving him his Sharingan. These events have haunted Kakashi and made him a rather melancholic and complex character.
Another reason could be related to Kakashi's past actions. If there are some secrets or things Kakashi did in the past that come to light and Naruto doesn't like them, he could snap at Kakashi. Naruto has a strong sense of justice and loyalty, so if he feels betrayed or misled by Kakashi, his reaction could be to snap.
Kakashi would likely still maintain his cool and mysterious demeanor. He'd be the experienced ninja, quick to analyze situations and offer sage advice. For example, when faced with a difficult opponent, he'd be calm and strategize on the spot. Hinata, on the other hand, would be her shy yet determined self. She might blush a lot around Kakashi at first but would show great courage when it comes to protecting others. Her Byakugan would be a crucial asset in the story, like if they were searching for something hidden in a lemon grove, she could use it to detect any hidden threats.
Well, often in Hurt Kakashi fanfiction, there's the theme of his physical injuries and how he copes with them. Given his dangerous line of work as a ninja, he gets hurt a lot. Writers might explore how he deals with long - term or serious injuries that could potentially end his ninja career. Also, his relationships can be a source of pain. For instance, his complex relationship with Obito and how that affects his mental state when they are at odds.
It's hard to say for sure. It could be that new characters were introduced or the main character faced some major challenges that changed the course of the story. Or perhaps there was a big reveal that shifted the entire narrative.
One possible reason could be that Kakashi is preoccupied with other important matters in the village. Maybe he has some top - secret missions or tasks assigned by the Hokage that demand his full attention, leaving him with little time to focus on Naruto.