There could also be characters who are indifferent. They might be so self - centered or caught up in their own problems that they don't really pay much attention to Ginny's supposed pregnancy. But as the truth starts to come out, they might use it to their advantage, perhaps to blackmail Ginny or gain some leverage in their relationships with other characters. It really depends on the personalities and relationships that have been established in the fanfiction world.
At the start, Ginny would be shocked and terrified when Tom Riddle kidnaps her. However, as time passes, her Gryffindor courage would kick in. She would start to analyze Tom Riddle's motives and actions. She might pretend to be more vulnerable than she actually is to lower his guard. Ginny could also try to communicate with any magical creatures or objects in her vicinity for help. And she would be mentally preparing herself for a fight or escape, using every bit of her magical training and her wits to outsmart Tom Riddle.
At first, Ginny would be hurt and disappointed. But being Ginny, she'd also be a bit defiant. She might act like it doesn't matter that much in front of Harry, but then go and pour her heart out to Hermione. She'd be thinking about all the times she remembered important things for Harry, and feeling a bit let down. And she might start to distance herself from Harry until he makes it up to her.
Harry would probably be very confused and shocked at first. He might feel a bit betrayed or at least extremely bewildered as Ginny is his wife. Ron would likely be flabbergasted and might not know how to handle the situation at all. Hermione, on the other hand, would start investigating right away, trying to find out the magical and logical explanations behind it.
It would likely strain her relationship with her brothers. They would be protective but also shocked and perhaps disappointed. For example, Ron might initially be angry and confused, but eventually come around to support her. Her relationship with Hermione would also be tested. Hermione might be more practical about the situation, trying to help Ginny with her studies and figure out a plan. With Harry, if he's the father, their relationship would become more intense and they'd have to grow up quickly to deal with the situation.
She would likely struggle a great deal. Morning sickness and general fatigue from pregnancy could make it hard for her to concentrate in class and keep up with her homework. She might have to miss some classes, which would put her behind in her studies.
Ron would probably be extremely confused and might make some awkward jokes at first. But once he sees that Harry is doing it for Ginny and that it's all in good fun, he would likely come around and support it. Hermione, on the other hand, would be more accepting from the start. She might even offer some advice on how to make the cross - dressing more believable, like using magic to adjust Harry's voice to be more feminine. The other Gryffindor students would likely have a range of reactions, from laughter and amusement to those who are a bit more conservative and might be a bit taken aback at first.
Some of their friends might also be a bit worried. For example, if there are still dark forces lurking in the wizarding world, they could be concerned about the safety of the baby. But overall, the love and support from their friends and family would far outweigh any concerns, and they would all come together to ensure a happy and safe environment for the new addition to the family.
Ron would be furious. He would immediately start looking for Ginny and would probably want to confront Harry without thinking. Hermione, on the other hand, would be more rational. She would try to figure out why Harry would do such a thing and look for clues. The Weasley parents would be extremely worried and would likely reach out to all their contacts in the wizarding world for help.
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.
Her team could be initially shocked. Some might be worried about her safety during missions and suggest she takes a break. For example, one member might be overly protective and try to keep her away from any dangerous situations. Others could be more supportive and offer to take on extra duties to make things easier for her.