Another reaction could be that Ginny tries to be stoic. She might put on a brave face in front of others, but inside she's hurting. She could focus on her Quidditch and studies more, trying to distract herself from the pain of the break - up.
Ginny could also be angry. She might confront Harry, demanding an explanation. She's a strong - willed character, so she won't just accept the break - up without a fight. She could accuse Harry of being cowardly or not thinking about her feelings.
Ginny might be heartbroken at first. She could retreat into herself, spending a lot of time alone in her dormitory or in secluded places around Hogwarts. She may cry a lot and avoid socializing with their mutual friends.
Ginny might be initially heartbroken. She could lock herself in her room and cry for days. After all, she loves Harry deeply. But then, she might become angry and start to focus on her own life more. For example, she could throw herself into her Quidditch career or her studies at Hogwarts.
In some fanfictions, Harry might become very angry. He might feel that Ginny is being unfair or not understanding his situation. This anger could lead him to say things he doesn't really mean in the heat of the moment. However, deep down, he's really hurt and confused.
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.
Bella may react by trying to understand Edward's reasons. She could be more rational in some fanfictions and instead of just being sad or angry, she starts to investigate. Maybe she discovers that there are forces at work that she can fight against to get Edward back. Or she could decide that she doesn't need him and focus on her own growth and development, becoming a stronger and more independent person without him.
Harry could be heartbroken. He might isolate himself for a while, not wanting to see anyone or do anything. Just staying in his room, crying and reminiscing about the good times with Edward.
Ginny might be overjoyed. She could blush deeply and then give Harry a big hug, telling him she feels the same way.
She might get angry right back. Ginny is a strong - willed character. So, if Harry yells at her unjustly, she could stand her ground and yell back, not willing to be pushed around.
She might be hurt at first. Since she's pregnant, her emotions could be more fragile, and Harry's anger could really sting.
Ginny might be angry. She could feel that her brothers are interfering in her personal life and not respecting her feelings for Harry. She might confront them directly and tell them that it's her choice who she wants to be with.
She might confront Harry directly. In the heat of the moment, she could burst out with her suspicions and demand an explanation. For example, she might say, 'Harry, I've noticed you've been acting strange around that girl. Are you cheating on me?'