She could act nonchalantly at first, but secretly be flattered. Ginny might continue with what she's doing, like chatting with her friends or reading a book, but inside she's happy that Harry is paying attention to her.
She might blush. Since Ginny has feelings for Harry, his stare could make her feel self - conscious and her cheeks turn red.
Ginny might be overjoyed. She could blush deeply and then give Harry a big hug, telling him she feels the same way.
On the other hand, Ginny might secretly be a bit flattered that Harry is so possessive over her. But still, she would probably try to stop the situation from getting worse and make Harry understand that he can't just go around punching people because of her.
Alternatively, Ginny could be very mature about it. She might respect Harry's decision, even though it hurts. She could choose to step back and give Harry the space he seems to need while secretly hoping that he will change his mind in the future.
Ginny might initially be heartbroken. She could retreat into herself, feeling betrayed and confused. In some fanfictions, she may cut off all contact with Harry immediately.
He could be initially shocked. Harry, who has trusted Ginny deeply, would find it hard to believe at first. He might go through a period of denial, trying to find excuses for Ginny's actions.
She might be shocked at first, but then show great empathy. After all, those scars are a testament to Harry's difficult past.
Harry might immediately rush to her side and comfort her. He could put his arm around her and ask her what's wrong in a gentle voice.
Ginny could be heartbroken. She might initially be in denial, thinking that Harry will change his mind. She has loved Harry for a long time and expected a future together, so this refusal would be a huge blow to her emotions.
Ginny could be heartbroken. She might have expected to marry Harry after all they've been through together. She could initially go into a state of shock and disbelief, not understanding why Harry has refused.
Some in the wizarding community might be shocked. After all, Harry and Ginny were seen as a power couple. There could be a lot of gossip and speculation in places like the Leaky Cauldron. People might take sides, with some blaming Harry for not being able to hold his family together, and others understanding that things are more complicated than they seem.