The theme of duty vs. personal desires can also be explored. Hisone has a duty as a dragon pilot, but she also has her own desires and dreams. Fanfiction can show the internal struggle she faces when these two aspects conflict, and how she resolves it, with Masotan being a part of that resolution in different ways.
One idea could be Hisone and Masotan facing a new, powerful and mysterious enemy that threatens their world. They have to figure out the enemy's weakness and work together in new ways to defeat it.
The main themes can vary a lot. Some common ones are friendship, love, redemption, and the struggle with mental health.
One possible main theme could be friendship. Pearl and Amethyst have a complex relationship in the original series, and in this fanfiction, their relationship might be explored further in the context of sins and harmony. Maybe it could look at how their different personalities and past actions (sins) affect their ability to find harmony with each other.
Trunks has a complex family history. His relationship with his mother Bulma and his father Vegeta can add depth to his character in fanfiction. Videl's role as a mother to Pan in the later series can also be explored in fanfiction. Maybe a story where Trunks and Videl discuss their future hopes for their families and how they can contribute to the safety and well - being of their loved ones in the Dragon Ball Z universe.
One common theme is self - discovery. As Bella is a pilot, she often has to face her fears and learn more about herself in the process. For example, she might discover her courage when facing a difficult flight situation.
Identity would be a major theme. Since Harry is now a Malfoy, he would have to deal with a whole new family identity and the values associated with the Malfoy name. Another could be forbidden love, as 'hp ss slash' might imply some sort of relationship that goes against the norms in the wizarding world.
Power and self - discovery are also frequently explored. Shihoin may start out with certain abilities but then uncovers new powers or aspects of themselves as the story progresses. For example, in some fanfictions, Shihoin has to learn to control a new and powerful jutsu. This theme ties in with the overall theme of growth that is prevalent in the Naruto series.
The theme of redemption might be present. Characters who have dabbled in the power of darkness may seek to redeem themselves. This could involve a complex journey of self - discovery and atonement. They might have to face the consequences of their actions while trying to find a way back to the side of good. Another aspect could be the exploration of the origin of dark power in the Naruto world. Maybe it's an ancient force that has been forgotten or something new that emerged due to certain events in the fanfiction's plot.
One common theme is the clash of cultures. Since Naruto's world has its own set of values, ninja clans, and a unique power system, and Highlander has its own lore about immortals and their rules. When combined, it often leads to exploring how these different cultures interact and adapt to each other.
One possible theme could be the pressure that Harry is under. In the regular 'Harry Potter' series, he has a lot on his shoulders, and in this fanfiction, it may be magnified to an unbearable level, leading to suicidal tendencies. Another theme could be the loss of hope. Maybe he has lost faith in the fight against evil or in his ability to find happiness, which is a very dark take on the character.