A prevalent theme is the exploration of his ninja skills. Writers often come up with new jutsus or ways for Kakashi to use his existing skills in more creative ways. Also, the theme of family is quite common. Given his father's story, fanfictions may explore how Kakashi views family and his place in it.
One common theme is friendship. Just like in the original Naruto series, Hatake often forms strong bonds with other characters in fanfics. For example, he might team up with Naruto or Sakura and they go on adventures together.
The theme of redemption can also be found. Some 'naruto hatake clan fanfic' may have a character from the Hatake clan who has made mistakes in the past and is now seeking to make amends. This could be related to events in the main Naruto storyline or new scenarios created by the fanfic authors. Additionally, the exploration of the clan's place in the larger ninja world, in terms of politics and alliances, is a frequent theme.
Well, a common theme is the search for power, whether it's to gain more power for himself to protect others or to stop someone else from misusing power. Another theme is redemption. Sometimes Harry has to help someone who has made mistakes find their way back to the right path. And the theme of survival in a dangerous world is also often seen in Harry Hatake fanfiction as he faces numerous threats.
Friendship is a common theme. Writers often explore how Sakura Haruno and Hatake can form a strong bond despite their differences. Another theme is growth, as they both grow as characters through their interactions in the fanfictions.
One common theme is the exploration of gender roles. Since Kakashi is male in the original, in fem Kakashi fanfiction, there's often a look at how being female changes the way she is perceived in the ninja world. For example, how she might face different challenges or opportunities.
One common theme is mutual understanding. Since they both have complex pasts, fanfictions often explore how they come to understand each other's pain and experiences. For example, Kakashi's loss of his comrades and Anko's past with Orochimaru.
Adventure is another theme. Writers might create stories where Sakura and Kakashi go on missions together that are not part of the original Naruto plot. These adventures can test their skills, loyalty, and the bond between them, and they often lead to character growth for both Sakura and Kakashi.
In this fanfiction concept, it could bring a whole new dynamic to the Naruto universe. Kakashi having Naruto as a son would mean a different kind of training for Naruto. Kakashi's calm and strategic mind could shape Naruto in unique ways. Maybe Naruto would inherit Kakashi's love for reading, especially those naughty books, and it could add a comical touch to his character while still maintaining his determination to become Hokage.
One common theme is the overcoming of Kakashi's past traumas. His love interest often helps him face his demons, like the loss of his comrades. Another theme is the secrecy and mystery surrounding their relationship at first. Since Kakashi is a private person, they might keep their feelings hidden from others. Also, the theme of mutual growth is prevalent. His love might inspire Kakashi to become an even better ninja, and he in turn helps her develop her skills or confidence.
One interesting fanfiction could be about Sakumo Hatake's early days as a ninja, his training methods, and how they might have influenced Naruto later. For example, a story could explore how Sakumo's values of loyalty and self - sacrifice were passed down in the village and how Naruto might have learned from his legacy.