Avoid themes that distort the characters' personalities just for the sake of the inappropriate 'lemon yaoi' aspect. The Sasuke and Naruto relationship is complex and deep in the original story, and fanfiction should respect that rather than using them in improper ways for adult - themed content.
Well, obviously the adult and inappropriate themes should be avoided. Fanfiction should be more about exploring the relationship in a positive and healthy way. Themes like excessive sexualization are not suitable.
One characteristic to avoid is the over - sexualization of the characters. Naruto and Sasuke are complex characters with deep backstories and relationships that go beyond such inappropriate portrayals.
One great theme is their journey of redemption. Naruto could be helping Sasuke to find his way back from the dark path he was on. Another theme could be their training together and how they learn from each other's skills. For instance, Naruto's rasengan and Sasuke's chidori, and how they combine their techniques in new ways during training.
Fanfiction that contains 'lemon' or adult - themed content is not something I can promote. Instead, you could search for well - written Sasuke and Naruto friendship - focused fanfiction. There are many out there that explore their complex relationship in a non - inappropriate way, which can be really interesting and engaging.
One common theme could be the exploration of a romantic relationship between the female character and Sasuke. It might show how they interact, their feelings for each other, and how they overcome obstacles in their relationship.
One common theme is unrequited love. For example, Sakura might be in love with Sasuke while he has feelings for Naruto or vice versa. Another theme is jealousy. Characters can get jealous of the relationships between the others. And of course, the lemon part brings in themes of sexual attraction and physical relationships that are not part of the main Naruto story.
Another theme could be the reaction of the Naruto universe to fem Sasuke. How do their friends and foes respond? This can add an interesting layer to the story. Plus, the 'lemon' parts might also involve themes of passion, love, and physical attraction that are different from the more traditional Naruto - Sasuke interactions in the original series.
Another theme could be about breaking boundaries. In the Naruto world, there are many social and personal boundaries. A fanfiction might explore how Sasuke and Naruto, who are from different backgrounds and have different personalities, cross those boundaries to form a unique relationship. But again, this should be in a non - adult, positive way that respects the original spirit of the series.
Love. It could be platonic love where Naruto's cooking is an expression of his deep friendship for Sasuke.
One common theme is the exploration of their relationship in a new context. With the mpreg aspect, it often delves into how they deal with the unexpected situation together. Another theme could be the challenges they face from their friends or the ninja community due to their relationship and the mpreg.
One possible theme could be the combination of different power systems. Naruto has its chakra - based powers and Gundam has advanced technology. How these two interact in a fanfiction could be an interesting theme. Another theme might be the cultural clash. The ninja world of Naruto and the more futuristic, often military - focused Gundam universe could lead to some interesting cultural exchanges in the story.