Dumbledore might be more understanding and see it as an opportunity for Harry to learn something about herself. He could offer some cryptic advice on how to handle the situation. Snape would likely be disdainful at first, but as the story progresses, he might show a bit of sympathy or at least be secretly intrigued by the magic involved in the potion.
One possible plot development could be that Harry, now female, has to deal with the newfound physical and emotional changes while trying to reverse the potion's effects. Maybe she has to seek out the help of her friends, like Hermione, who uses her vast knowledge of magic to find a cure.
If Harry is turned into a weapon, Ginny would be heartbroken. She would be by his side constantly, trying to communicate with him even though he's in weapon form. The Weasley family as a whole would be outraged. They would see it as an attack on one of their own. Snape might initially seem indifferent but secretly would also try to find a way to reverse it, perhaps out of his complex feelings towards Harry and his loyalty to Dumbledore.
Harry might be really confused at first. He's used to seeing Draco as an adversary, so suddenly having these strong feelings of love would be really disorienting. He might try to fight the feelings or question if they're real. Draco, on the other hand, could either be in denial or embrace it depending on his character in the fanfiction. If he's written as more self - assured, he might go with it at first, but if he's more insecure, he might try to hide it.
The potion could enhance Harry's magical powers. For example, it might make his spells stronger or more accurate. This would be useful in battles against dark wizards or in his general studies at Hogwarts.
Well, in the fanfiction, if we consider the people around Harry, the teachers at Hogwarts could be concerned at first. Dumbledore, being the wise figure, might see potential in the baby and encourage Harry. As for Edward's friends in the vampire coven, they would have mixed feelings. Rosalie might be jealous as she always wanted a normal life with a baby. Jasper might be worried about the baby's influence on their coven's stability. But overall, as time passes, they would adapt and form a new kind of community around the baby.
Dumbledore, if he finds out, would surely take action. He might not be able to reverse the effects of the Veritaserum immediately, but he would find a way to protect Harry from any long - term consequences. The other members of Dumbledore's Army would be in shock. They would worry about what Harry has revealed and also feel a sense of guilt for not being able to protect him from Umbridge's devious plan. Some of the more rebellious students might even start a protest against Umbridge's use of Veritaserum on a fellow student without proper authorization.
He might be suspicious at first. Given their different houses and the general tensions between Slytherin and Gryffindor, Harry would be cautious about Blaise's motives.
Albus Potter could react in various ways. He may feel a sense of protectiveness over his family's story. If a fanfic is respectful and well - written, he might appreciate it. However, if it distorts the facts or portrays his family in a negative light, he would probably be angry. He might also be intrigued by the new ideas and concepts that the fanfics introduce to the wizarding world he already knows so well.
Sirius would probably be shocked at first. Then, he'd likely feel a deep sense of sadness and guilt. He might think that he should have been there more to protect Harry from getting those scars.
Their friends would be in shock. Ron, being Harry's best friend and Ginny's brother, would be torn between loyalty to both. Hermione would probably be disappointed in Ginny and very supportive of Harry. The Weasley family as a whole would be divided. Mrs. Weasley, who loves Harry like a son, would be heartbroken and angry at Ginny. Their other friends at Hogwarts or in the Order of the Phoenix would likely gossip and have mixed feelings. Some might pity Ginny for the difficult situation she got herself into, but also condemn her for cheating on Harry.