It might change her relationship with Ron. He could be initially shocked but then grow to like the new look, seeing it as a sign of Hermione's independence. Or it could cause some tension if he preferred her old look.
One possible reason could be a symbol of a new beginning. Maybe she's had a major life change, like starting a new chapter in her relationship or in her studies at Hogwarts. It could also be a sign of rebellion against the traditional image others have of her. In some fanfictions, she might cut her hair to fit in with a different group or to show that she's breaking free from her old self.
There are so many potential stories behind Maggie cutting her hair. It could be that she was involved in a play or a performance where she needed to have a different look, so she cut her hair for that role. Maybe she was in a place where the climate was really hot and long hair was just too uncomfortable, so she opted for a shorter cut. It could also be that she just wanted to make a statement, to show that she is an independent and bold person who isn't afraid to make a drastic change to her appearance.
Perhaps Maggie cuts her hair on a whim. She wakes up one morning, looks in the mirror, and decides right then and there that she needs a change. So she grabs a pair of scissors and just goes for it.
It could be a story of self-transformation and finding new love. Maybe the girl cutting her hair symbolizes a fresh start and catches the attention of a special someone.
Hermione could also be very hurt. Her hair is part of her identity, and having Draco, who she already has a strained relationship with, do something so cruel would cut deep. She might go to her friends, Harry and Ron, for support. They would likely be just as angry as she is and plot some sort of revenge against Draco and his Slytherin friends.
She would probably be very angry. Hermione is a strong - willed character. She might immediately try to break free from his grip and demand an explanation. For instance, she could shout at him, 'Professor Snape, what do you think you're doing? This is completely unacceptable!'
There's this fanfic called 'Hermione's Hair Salon'. In it, Hermione not only styles hair but also uses her knowledge to create magical hair products. The story has a lot of fun interactions between the characters, like when Harry comes in for a wild new look.