One possibility is that Voldemort could initially be amused by Harry's request. He might toy with Harry, pretending to consider helping while actually having his own evil plans. For example, he could use Harry's vulnerability at that moment to gain some sort of advantage, like getting information about the Order of the Phoenix. Or, Voldemort could see it as an opportunity to corrupt Harry further, slowly turning him to the dark side by making false promises of power and protection.
Another scenario could be that Voldemort simply refuses. He is a very prideful and evil character. He may view Harry as his mortal enemy and the idea of helping him is completely against his nature. He might even try to kill Harry on the spot, seeing his request as a sign of weakness or a trick.
She could also provide Harry with some protection. In fanfiction, she might be even more proactive in keeping Harry safe from the dark forces. For example, she could give him a magical charm or a secret spell that only she knows to fend off enemies. Or she could arrange for some trusted allies to keep an eye on Harry when she can't be around.
One possibility is that Snape initially refuses to help Hermione. He has his own grudges and is often portrayed as a cold character. But as the story progresses, he might see something in Hermione's situation that relates to his own past or values, and reluctantly start to offer some guidance.
Ginny asking Harry out could lead to a very interesting chain of events. It could cause some jealousy among other students who have a crush on either of them. Ron, for example, might be a bit taken aback at first but then come around to support his sister and best friend. As for their date, it could be something unique like a midnight stroll in the Forbidden Forest (with proper precautions of course), where they talk about their fears, hopes and dreams, deepening their connection.
Well, it could also go wrong. Maybe Hermione has always seen Harry as just a friend, and his asking her out makes things really uncomfortable between them. She might turn him down gently but then worry about how it will affect their friendship. Their other friends, like Ron, could also get involved, perhaps causing more chaos if he has his own unexpressed feelings for Hermione.
The most obvious consequence would be that Voldemort would likely betray Harry. Voldemort is evil at his core, and he would probably use this opportunity to harm Harry or gain more power. For example, he could steal Harry's magic or use him as a pawn in a new scheme.
One possibility is that Harry would be really flustered. He's not used to such direct attention from someone as beautiful as Fleur. He might initially be in shock and not know how to respond. Then he would probably think about how this would affect his relationship with his friends, especially Hermione and Ron. Maybe he'd worry about Ron getting jealous since Ron has a bit of a crush on Fleur.
Well, one possibility is that Harry would be completely shocked. He might initially think Draco is playing some sort of cruel joke on him. After all, they've been rivals for so long. But then, he could start to consider it seriously. Maybe he realizes that this could be a chance to bridge the gap between them. He might accept, which would cause a huge stir among their friends and classmates.
Maybe she says yes right away. Tenten has always seen Naruto's good heart and his determination. If she has also had some hidden feelings for him, she would be overjoyed. They could then start going on little adventures together outside of their regular ninja missions, like exploring new parts of the village or trying new foods at the local stalls.
Well, if Harry is captured by Voldemort in fanfiction, it could lead to some really dark and intense scenarios. Voldemort might torture Harry to get information about the resistance. Harry, on the other hand, could be secretly planning an escape while pretending to be broken. There could also be a rescue mission by his friends, which would be full of danger and drama.
The Order of the Phoenix would be horrified. They have spent so much time and effort fighting against Voldemort. If they found out Harry had asked for his help, they would likely feel betrayed. They might even try to stop Harry, thinking he had been somehow influenced or corrupted.