Well, her enemies would be affected too. If she was using the henge to spy on them, for instance, they would now know her true identity and could take steps against her. And not just the main characters, but also other side characters in the Naruto universe who interacted with her while she was in henge could have their relationships with her change.
Her friends would surely be affected. For example, Sasuke might be shocked or have a different view of her. Also, Sakura could be surprised and it might change their dynamic.
The people around Naruto would all be affected in different ways. Her sensei, like Kakashi, might need to re - evaluate how he trains and protects her. Her village mates might start to see her in a new light. And any allies she had while in henge form could now have a different relationship with her. It's not just about the individual characters but also about the groups and factions within the Naruto world that might react to this change in Naruto's identity.
His friends would be affected. For example, Sasuke might see Naruto in a new light and realize that they are more similar than he thought, both having their own inner struggles. Sakura would also be more empathetic towards Naruto and might try to be a better friend, offering more emotional support.
His enemies, too. They might realize that Naruto is not as straightforward as they thought. If he shows a more cunning side by dropping the mask, they would have to adjust their battle strategies. For example, Orochimaru might find Naruto a more formidable opponent than he initially believed.
Well, in such a fanfiction, Naruto might drop her henge (disguise) and it could lead to all sorts of interesting situations. Maybe her true identity is revealed to some characters who didn't know before, which could cause shock and new plot developments.
One possible consequence could be that his identity is revealed. If he was using the henge for undercover purposes or to hide his true self, then dropping it would expose him. His friends or allies might be shocked if they didn't know his true form. Another consequence could be that his enemies might take advantage of his revealed state and attack him more easily, as they now know exactly who he is.
One possible consequence is embarrassment. If he was using the henge in a social situation, like trying to impress someone or fit in, when it drops, he'd look really silly. Another consequence could be danger if he was in enemy territory. Enemies would recognize him immediately.
The plot could center around Fem Naruto's henge failing at an inopportune time. Say she's trying to infiltrate an enemy base, but the henge drops right in the middle of it. She then has to use her natural skills and wits to get out of the situation. It might also lead to some interesting character development as she learns to accept her true self more.
He could be buying it for Sakura. Maybe Sakura is in a situation where she needs a new bra but is too busy with her medical ninja duties to go and buy one. Naruto, being the helpful friend he is, decides to use his henge and get it for her.
The story could progress in many ways. It might lead to a chase scene if there are enemies around. His friends might have to quickly come to his rescue. Or the story could shift focus to how Naruto has to explain his true identity and his reasons for using the henge in the first place.
When Fem Naruto drops her henge, it can change the power dynamics. If she was using the male henge to gain an advantage in a male - dominated world in the story, losing it might make her more vulnerable. For example, in a fight, her opponents might underestimate her as a female now.
His friends would be affected. They might be both in awe and a bit worried about the new - powered Gaara. His siblings, too. They would need to adjust to this new version of Gaara who has Shukaku back.