Ginny would be angry as well as sad. She has been through a lot and to have Harry leave her for Cho would be a huge blow. She might lash out at both of them. Cho would be cautious. She remembers how things ended with Harry before and would be worried about getting hurt again. Harry would be in turmoil. He knows he's hurting Ginny but he feels like he has to follow his heart towards Cho, and he'd be constantly thinking about the consequences of his actions on everyone involved.
Ginny would likely be heartbroken. She's a strong character but she loves Harry deeply. She might start to question herself and what she did wrong. Cho, on the other hand, would be surprised but also happy. She may have still had feelings for Harry all along. Harry himself would be conflicted at first, feeling guilty for leaving Ginny but also excited about the possibility with Cho.
In this type of fanfiction, it could be that Harry has some unresolved issues from his past relationship with Cho. He sees Ginny as a distraction from dealing with those. But as time goes on, he can't ignore the pull he still feels towards Cho. He may leave Ginny when he realizes that he can't move forward in his life without exploring what could have been with Cho again.
Harry might be initially in shock. He can't believe Ginny would leave him and their child. He could become withdrawn, not really knowing how to deal with this new situation.
In the fanfic, their relationship could develop gradually. Harry might be hesitant at first due to his past experiences with Cho. However, Ginny's warmth and understanding draw him in. They might start off as friends, sharing secrets and having deep conversations. As time passes, they realize their feelings are more than just friendship and start a romantic relationship. Ginny's family also plays a role, as the Weasleys welcome Harry, which makes him feel more at home and closer to Ginny.
One possible reason could be that Harry realizes he has stronger emotional and intellectual compatibility with Ginny. He might find that Ginny understands his complex life as a wizard better, especially with her own experiences in the wizarding world. Also, Ginny is more in tune with Harry's adventurous spirit, which Cho might not be as much.
Ginny herself might be conflicted. Even though she made the decision to leave, she would still have feelings for Harry. She could be sad and second - guess her decision. The Weasley family would be divided in their reactions. Molly would be worried about both Ginny and Harry, trying to patch things up. Arthur might be more understanding of Ginny's need for independence but would also hope for a reconciliation. Ginny's brothers would have different reactions. Some might side with Ginny, while others might think she was too hasty in leaving Harry.
Friendship is another theme. Stories often show how Ginny and Cho can overcome their initial rivalry and become friends. For example, they might bond over their shared experiences in the wizarding world or their mutual care for Harry in a more platonic way. This theme helps to add depth to their characters.
In developing these characters, we can show Cho's jealousy in different ways. She might be passive - aggressive at first, like making snide remarks about Ginny. This would show her immaturity. Harry can be developed by having him be patient with Cho, which shows his good nature. But also, he should be shown as being very protective of Ginny. Ginny could be developed by having her reach out to Cho in a friendly way, trying to understand her jealousy. This would show Ginny's big - heartedness and could lead to Cho's character development as she realizes Ginny isn't a threat and starts to work on her own self - worth.
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.
For Harry, he might experience a sense of relief and new - found happiness with Ginny. He's been through so much, and Ginny represents a more stable and loving relationship compared to the complex dynamic with Draco. Ginny, on the other hand, would be overjoyed to finally have Harry fully committed to her. For Draco, it would be a huge blow. He might feel rejected and angry, especially since his relationship with Harry was always so competitive.
She might also be sad and heartbroken. Ginny is a strong character, but being left alone while pregnant is a huge blow. She could withdraw from her friends and family for a while as she tries to come to terms with the situation and figure out how to raise the child on her own.