Tenten could be a love interest. She is a strong and independent female ninja. If Naruto turns into a girl, they could bond over their ninja skills and develop a relationship. Maybe during a mission where they are paired together, they realize their feelings for each other and start a yuri relationship.
Sakura could be a potential love interest. Since Naruto has always had a connection with her, as a girl, that connection could turn into a yuri - like romantic relationship. They already know each other well, and Naruto's new form could make Sakura see her in a different light.
Hinata is a very obvious choice. She has always had deep feelings for Naruto. In a fanfiction, their relationship could spiral further, exploring more of their shared interests, like their love for the village and their dreams for the future of the ninja world.
One potential love interest could be Joey. They could have a different kind of dynamic as Yugi is a girl. Maybe Joey is initially protective of her and then gradually falls in love. Their relationship could be based on mutual respect for each other's dueling skills and shared experiences in the Duel Monsters world.
There could be an older, more mature character, like a college student who she meets by chance and who is drawn to her unique charm and innocence.
In this type of fanfiction, Eric is a very likely love interest. He was already interested in Sookie when she was human, and now that she's a vampire, they might have a deeper connection. Bill, on the other hand, may have a love - hate relationship with Sookie. He could be jealous of her new vampire status. There could also be a non - vampire love interest, like a werewolf who is attracted to Sookie's newfound strength and independence as a vampire.
Perhaps a mortal with a special gift for metallurgy or some other craft related to Hephaestus' work. This mortal could be seen as an equal in terms of skill, at least in a way that catches Hephaestus' eye. They would bond over their shared love for the craft, and over time, this bond could turn into a deep, loving relationship. Hephaestus might be drawn to the mortal's unique perspective and the way they approach the craft despite not having the same divine powers as he does.
One possible plot is that Naruto, now a girl, enters a yuri - themed ninja tournament. There, she meets a powerful and beautiful female ninja. They start off as rivals but as they face each other in battles and training sessions, their relationship evolves into something more. Naruto's new - found femininity could add a whole new dynamic to their interactions.
Sasuke could be a great love interest. He has a complex personality with his dark past and his journey of redemption. A fanfic could explore a relationship where the protagonist helps Sasuke fully come to terms with his past and in the process, they fall in love. His cool and aloof exterior would make for an interesting dynamic as the relationship develops.
One potential love interest could be Rock Lee. His unwavering dedication to his training and his positive attitude could be appealing to Naruto as a female. They could bond over their shared values of hard work and perseverance. Another could be Itachi, if the story takes a different turn and he's still alive. His mysterious and complex nature might draw Naruto in, and they could have a relationship that's full of intrigue and understanding, especially considering Naruto's new identity as a female.
If it's a crossover with the Percy Jackson universe, Percy himself could be interested in Ruby. They both have a sense of adventure and a desire to protect their friends. Annabeth might find herself drawn to Weiss because of their shared intelligence and strategic thinking. Leo Valdez could have a crush on Yang due to her mechanical skills and fiery personality. And Nico di Angelo might be intrigued by Blake because of her mysterious nature. These could all be great potential love interests in a RWBY - Percy Jackson crossover harem fanfiction.
Ezra might also be a possibility. He could be involved in a complex relationship with Spencer where he has to deal with her pregnancy and all the emotions that come with it.