One possible plot could be that Naruto, in an alternate universe, finds himself in a situation where he is surrounded by the members of Kara. Each Kara member has a different view of Naruto. Some might see him as a threat at first but gradually grow to respect and even develop feelings for him. For example, Delta could be initially sent to capture Naruto but ends up being intrigued by his strength and his never - give - up attitude. As the story progresses, Naruto has to navigate these complex relationships while also dealing with whatever overarching threat exists in this fanfic world.
The main character is Naruto. Among the Kara members, Eida is very likely to be in the story as she can create a lot of relationship - based drama with her power. Delta is another one, given her strong and somewhat brash personality. Amado, the former Kara member, could also be involved in some way, perhaps as a guide or an informant for Naruto within the Kara - related plot. And the other Kara operatives could also make appearances and potentially be part of the harem - like relationships around Naruto.
It could be a rogue member of Kara who has their own agenda and doesn't agree with any form of alliance with Naruto or the Hidden Leaf. This character might try to undermine any cooperation between Naruto and the rest of Kara.
One idea could be that Kara is sent to infiltrate the Hidden Leaf Village but Naruto befriends a member of Kara and changes their perspective. Then they end up working together to fight a greater threat.
Sakura could be one of the likely characters. She has a long - standing relationship with Naruto in the original series. In a fanfic with this concept, she might be drawn to Naruto's new connection with the fem Kyuubi out of curiosity or her own feelings for Naruto evolving. Hinata is also a strong candidate. Given her long - held feelings for Naruto, she would likely be part of the harem, especially as Naruto's power grows with the fem Kyuubi. And Ino could be there too. She's competitive and might see Naruto's new situation as something interesting and want to be part of it.
Sakura could be a popular choice. She has a long - standing relationship with Naruto in the original series, so it's easy to imagine her in a harem setting. Hinata is also very likely to be in the harem as she has deep feelings for Naruto. And then there's Ino, who has her own charm and could add an interesting dynamic to the harem.
One common theme is self - discovery. The OC often has to figure out their place in the Naruto world while being in a harem, which helps them grow as a character.
Another theme is the exploration of different cultures. Since Naruto and Bleach have their own unique cultures, the fanfic often delves into how these cultures interact when the characters are brought together. This can include things like how the ninja way from Naruto might be perceived by the Soul Reapers in Bleach, and how the hierarchies in both worlds are navigated in the context of the harem relationships.
One common theme is the clash of different personalities. Naruto has his own set of values and beliefs, and Serafall has hers. When combined in a harem setting, there are often clashes and reconciliations. Another theme is the development of relationships, not just romantic ones but also friendships within the harem.
Well, it could be about Naruto finding himself in the Pokemon world. And various female Pokemon trainers or even some Pokemon themselves (in a more human - like form perhaps in the fanfic's concept) form a harem around him. They might be attracted to his ninja skills, his determination, and his kind heart.