At the start, Sakura may be a bit nervous about how others will react. But as time goes on, she gets better at it. When guys tease her for being a bit different, she teases back. If there are girls who seem attracted to her male guise, she might try to gently let them down without blowing her cover. She also might make some really close male friends while dressed as a guy, and they could be a great support system for her, helping her deal with any negative reactions from others.
Hermione, on the other hand, could be more understanding. She might see it as Harry expressing his individuality. She could be supportive and even defend Harry if others are mean about it. In many fanfics, she's the one who tries to promote acceptance. She might say that just as witches can wear trousers, wizards can wear dresses if they like.
Typically, the reactions vary. Some of the more open - minded characters, like Luna, would likely accept Harry's new style without much fuss. They might even compliment him. However, the Slytherins could potentially use it as a means to taunt him. But then, Harry might grow from these experiences and become more confident in his new appearance despite the naysayers.
Sakura could also handle it with a sense of pride. She is a strong character in her own right. So, instead of feeling like she is being forced into something, she takes charge of the situation. She makes it clear to Sasuke that she expects respect in this relationship. And as she continues to grow as a ninja and a person, Sasuke can't help but be drawn to her, changing the dynamic of their arranged marriage for the better.
His friends would likely be in shock. Sasuke, for instance, might be deeply affected as Naruto is his closest rival and friend. He could initially be angry at Naruto for being so reckless, but then feel a deep sense of loss.
Some characters might be shocked. For example, Kakashi, who knew Haku, could have a moment of confusion and then be amused. He might see it as Naruto's unique way of paying respect or exploring different ninja identities. The younger ninja in the village could be inspired by Naruto's boldness in dressing like someone else. They might start thinking about different ways to express themselves through clothing and mimicry of other ninja.
In most of these fanfictions, the family reactions are quite complex. For example, Ginny's family, especially her brothers, might be initially angry or disappointed. They've always seen Draco as an enemy. Draco's family, on the other hand, might have mixed reactions. Some might see it as a way to gain some sort of control over the Weasley family, while others might be ashamed.
Another reaction could be that she tries to find a way to redeem Konoha. Despite the betrayal, Sakura might still have some love for the village. She could work towards changing the situation from within, trying to fix what has been broken and make Konoha a place she can be proud to call home again.
Sakura might directly confront her boyfriend. She could tell him that he has no reason to be jealous of Sasuke. For example, she could say that her feelings for her boyfriend are completely different from any admiration she has for Sasuke.
The teachers at Hogwarts, like Dumbledore, might be portrayed as having known all along. They could give Harry some cryptic advice or just a knowing look. And then there are the other students. Some might spread rumors, while others might be more empathetic. For example, Luna Lovegood could offer some unique and wise words to Harry about his feelings for Hermione.
In these fanfictions, their character development is intertwined. Naruto's positive attitude can influence Sakura to be more optimistic. And Sakura's intelligence can help Naruto make better decisions. For instance, if they travel to a time when they are still genin, Sakura can guide Naruto in his training, and Naruto can inspire Sakura to be braver in battles, which is different from their original development in the main series.