The author could use internal monologues. Sasuke could be constantly thinking about Naruto in her mind. She might admire his determination and his unique way of seeing things. This would show her growing crush on him as the story progresses.
Their relationship would become more complex. Sasuke would probably be more protective of Fem Naruto. Instead of just seeing her as a rival, he would have an added layer of emotional investment.
A possible plot twist could be that Naruto is oblivious to Sasuke's feelings at first. He might just think of her as a good friend and Sasuke has to work hard to make him see her in a different light.
You can start by checking out popular fanfiction websites like FanFiction.net or Archive of Our Own (AO3). Just type 'Naruto x Fem Sasuke crush' in their search bars and you'll get a list of relevant stories.
One plot idea could be that Sasuke initially tries to deny his feelings for Fem Naruto. He might act cold towards her but then small moments, like when she gets hurt protecting him, start to break down his walls. Another idea is that they are on a mission together and have to pretend to be a couple, which makes Sasuke realize his true feelings.
Naruto, being the friendly and optimistic one, would likely be excited for Gaara. He might encourage Gaara to be more open about his feelings towards Sakura. He could offer advice based on his own experiences with Hinata. Sasuke, though, would probably be aloof. He has always been more focused on his own goals and revenge. He might view Gaara's crush as a distraction for Gaara and tell him to focus on more important things, like protecting his village. However, deep down, he might also hope that Gaara can find some happiness.
Well, at first, Naruto might be completely oblivious to Fem Kyuubi's feelings. But as she starts to show more affection, like always being around him when he's in danger or bringing him little gifts in her own unique way, Naruto will start to notice. Then they could start to have more heart - to - heart conversations, which will deepen their relationship.
One popular 'Naruto x Fem Sasuke crush fanfiction' is 'The Unspoken Bond'. In it, Naruto slowly realizes his feelings for Fem Sasuke as they go on missions together. Another great one could be 'A Different Kind of Love' where Fem Sasuke starts to have a crush on Naruto first and it shows their relationship development in a really sweet way.
Their relationship can be developed through shared experiences. For example, going on dangerous missions together. Each time they face a new threat, they learn more about each other's abilities and personalities. Naruto's positive attitude can slowly break down Fem Sasuke's more reserved nature.
In such a fanfiction, their relationship could develop in various ways. Naruto might start leaving little gifts for Kakashi anonymously. This would pique Kakashi's curiosity. Eventually, when he discovers it's her, he could be touched. Then they might start spending more time together during training or on missions, and their bond would grow deeper from there.
The relationship could begin with simple acts of kindness. Maybe Naruto helps Fem Sasuke deal with the trauma of the war. He offers her emotional support, which she has never really had before. This makes her open up to him, and from there, they start to develop a bond. As time passes, they realize that their bond is more than just friendship, and they fall in love while trying to create a better future for their world.