In some fanfictions, Ginny could be mad because Harry made decisions without consulting her. After the war, they were supposed to be in a relationship, but if Harry made choices about their future, like whether they should move to a different place or his future career path, without including Ginny in the discussion, she would be rightfully angry. For example, if he decided to go on a long - term mission without talking to her first.
One possible reason could be that Harry was away a lot after the war, dealing with the aftermath and his newfound responsibilities. Ginny might have felt neglected. Maybe she expected more time together, but Harry was constantly occupied with things like helping to rebuild Hogwarts or being involved in the Ministry's new initiatives.
In some fanfictions, Ginny might be mad at Harry because of a misunderstanding. For example, she could misinterpret his actions towards another girl as being unfaithful. Maybe he spends a lot of time with Hermione on a project and Ginny thinks there's something more between them.
It could be due to jealousy. Perhaps Ginny has been spending a lot of time with another character, and Harry misinterprets their relationship, leading to his anger. In fanfiction, the writers often play with such emotions to create drama.
One scenario could be that Harry is overly protective of Ginny after the war. While it may seem like a good thing, Ginny is a strong - willed witch. If Harry starts treating her like she's fragile and tries to limit her activities, she would get angry. For example, if he doesn't let her participate in certain dangerous but important magical tasks because he's afraid she'll get hurt. Also, if there are rumors or false accusations about Harry in the post - war wizarding world, and he doesn't share them with Ginny right away, she might be mad that he didn't trust her enough to confide in her.
She might be hurt at first. Since she's pregnant, her emotions could be more fragile, and Harry's anger could really sting.
One possible reason could be that he's worried about Ginny's safety during the pregnancy. He might be overprotective and his concern comes out as anger.
A third scenario could be jealousy. If other witches start showing interest in Harry and he doesn't immediately and firmly shut it down, Ginny might get mad. She is a proud witch and doesn't want to share Harry's affections, and his seeming indecisiveness in such situations could lead to her anger in fanfiction.
Harry could become an Auror, as he's always been good at fighting dark forces. Ginny, on the other hand, might continue her career in Quidditch. They would support each other's choices. Harry would cheer for Ginny at her matches, and Ginny would be proud of Harry for his work in keeping the wizarding world safe.
One possible story could be that after the war, Harry suffers from paraplegia due to some dark magic he endured during the final battle. Ginny stays by his side, being his strength. She helps him through the difficult process of physical therapy. Their love becomes even deeper as they face this new challenge together.
Some fanfictions might depict them as having a more adventurous post - war life. They could be involved in rebuilding the wizarding world in a more hands - on way. Harry might use his fame and Ginny her popularity among the younger wizards to bring about positive changes. Their relationship would be based on mutual respect and a shared goal of making the wizarding world a better place.
In this fanfiction, Harry could develop a more tender side. The chaos of the war makes him cherish the time he has with Ginny more. He becomes less solitary and more open to relying on others, especially Ginny. Ginny's character might develop in terms of her magical abilities. She may discover new spells or ways of using magic to fight, all while supporting Harry and being his emotional rock. She could also become more politically aware, trying to influence the wizarding world's stance against Voldemort.