The theme of unrequited love can also be present. In some fanfictions, Kakashi's protectiveness might stem from his hidden feelings for Sakura. He might be too afraid to admit his love but his actions of protection speak louder. This adds an interesting layer of complexity to their relationship in the fanfiction world.
Another theme is the idea of family. Sometimes, these fanfictions portray Kakashi as seeing Sakura as a younger sister or a family member he has to protect. This can lead to some really heart - warming moments where he goes above and beyond to keep her out of harm's way.
One common theme is mentorship. Since Kakashi is a more experienced ninja, there's often a theme of him mentoring Sakura, which then can develop into something more. Another is the theme of unrequited love, where either Sakura has feelings for Kakashi that she has to hide or vice versa.
Emotional connection is another prevalent theme. Some fanfics show a deeper, more personal bond between them that might not be as obvious in the original series. This could be in the form of shared secrets, or just a special understanding they have for each other.
A frequent theme is the exploration of their relationship outside of the main Naruto storyline. For example, in some fanfics, they are the main characters in a post - war world where they have to rebuild the village together. Also, the theme of mentorship turning into something more, like a romantic relationship, is quite common. Kakashi starts as Sakura's teacher but as the story progresses, their relationship deepens in a different way.
Often, there's a theme of redemption as well. The Slytherin character may have had a less - than - perfect past or be associated with some not - so - nice Slytherin traits. But by protecting Hermione, they are on a path of redemption, proving that they can be more than what others expect of them. For example, they might be trying to make up for past wrongs done by their house mates or their own previous actions.
A theme that often comes up is his physical pain and how he endures it. This can be used to show his strength and tenacity. For example, in a battle - themed fanfiction, he endures great pain but still manages to fight for the sake of his village. Also, the theme of self - discovery through pain is common. As he experiences pain, he learns more about himself and his limits.
One common theme is the adjustment to married life. Given their different personalities, there's often a focus on how they learn to live with each other. Another is their combined strength in facing threats to the village. Since they're both strong shinobi, they might fight side - by - side as a married couple.
I'm not aware of the exact common themes in such fanfic as I don't promote or have in - depth knowledge of lemon - themed fanfics. However, in general, in relationship - based fanfics, themes like mutual understanding, hidden feelings, and personal growth within the relationship might be explored, but this is just speculation.
One common theme is the age - gap dynamic. Since Kakashi is older, it can create an interesting power balance and source of tension. Another theme could be the idea of forbidden love, as they are comrades in the Naruto world and a relationship between them might not be the norm.
The theme of sacrifice also pops up. In some fanfictions, either Kakashi or Sakura is willing to sacrifice themselves for the other because of the strength of their soulmate connection. This shows the deep love and loyalty that comes with being soulmates. For instance, Kakashi might put himself in harm's way to protect Sakura, knowing that she is his soulmate and he couldn't bear to lose her.
One common theme is unrequited love. Usually, Kakashi has strong feelings for Sakura while she may be oblivious or have her own feelings for someone else. Another theme is the struggle of Kakashi to control his obsession, as he is a disciplined ninja.