One common theme is redemption. Naruto, being banished, often has to prove himself again, and through his relationships with the female characters in the harem, he finds a way to redeem himself in the eyes of others.
Sakura could be one. After Naruto's banishment, she might realize her true feelings for him and follow him. Hinata is also a likely candidate. Her long - standing admiration for Naruto could lead her to join him during his banishment. And then there could be some original female characters created specifically for the fanfiction, perhaps a powerful kunoichi from a far - off land who is intrigued by Naruto's story.
One interesting plot could be Naruto being banished and then gradually forming a strong bond with the female characters in the harem. As he overcomes his feelings of rejection from his village, he discovers new powers and relationships. For example, he might learn new jutsu from one of the female characters who has a unique family technique. This would not only make him stronger but also deepen their connection.
Well, perhaps in this 'banished naruto x fem asuma harem fanfiction', Naruto is banished due to false accusations. Fem Asuma, who has her own set of skills and a strong personality, takes pity on him. The harem aspect could start when Naruto starts to train with Fem Asuma and other female trainees join in. They see Naruto's unique abilities and his kind heart, which makes them fall for him one by one.
The main antagonists could be a group of rogue ninjas. They target Naruto because of his reputation as a banished and potentially vulnerable target. And they also see Fem Asuma and her group as an obstacle. They might try to kidnap the female characters to lure Naruto into a trap, or steal valuable resources from them to undermine their growing community.
There's also 'Naruto: The Banished Loner and His Harem'. This one focuses a lot on Naruto's loner status at the start. As the story progresses, the female characters start to see his true self and are drawn to him. It has some great action scenes combined with the development of the harem relationships.
Maybe Naruto is banished because of false accusations, and fem Sasuke feels betrayed as she thought Naruto would always be there for the village. However, Naruto's banishment leads him on a journey of self - discovery. Fem Sasuke, torn between her loyalty to the village and her feelings for Naruto, eventually decides to follow Naruto. They then face many challenges together which strengthen their bond and lead to a romantic relationship.
Well, it could be about Naruto having a unique relationship with a female Kyuubi who has been banished. Maybe Naruto tries to find a way to bring her back and in the process, they develop deep emotional bonds. He might face many challenges, like opposition from the village or other powerful forces who don't want the Kyuubi back.
One common theme is redemption. Naruto, being banished, often has to prove himself worthy again. And Sasuke, as a female, may play a role in his journey towards redemption. Another theme is love against all odds. Their relationship is usually complicated by Naruto's banishment, but they still find a way to be together.
Love and forbidden love are common themes. Since Itachi is from the Uchiha clan and Naruto (as a female in this context) is an outcast, their relationship goes against the norms of their world.