Charlie may initially be confused. Fanfiction isn't something he might be very familiar with. But once he understands what it is about Harry and Ginny, he might just shrug it off. He's got his own life with dragons and such, so he might not really care all that much as long as it doesn't cause any real - world problems for his sister and Harry. However, if it spreads some false or unflattering rumors in the wizarding community, he might get a bit annoyed.
Charlie could have a range of reactions. He might be curious and start reading some of the fanfiction himself to see what all the fuss is about. He could find it endearing how fans are so invested in Harry and Ginny's relationship. On the other hand, if the fanfiction contains any elements that he feels are inappropriate or disrespectful to his family or friends, he would likely be angry. He's a Weasley after all, and they are a tight - knit family that looks out for one another. He would probably want to protect Ginny's reputation and the positive image of her relationship with Harry.
Charlie might be shocked and filled with anger. He could immediately seek to comfort Harry and ensure his safety. Maybe he'll vow to find the perpetrator within the context of the fanfiction's story.
He might be quite shocked at first. After all, Wolfstar involves his dad's best friend Sirius and his other dad figure Lupin. It's a rather strange concept for him to think about them in a romantic way as he knew them in a different context.
Deadpool could also be protective. If Spider - Man is a teen, he might see himself as a sort of protector. He could say something like 'Hey, little spider, I got your back since you're just a youngster in this crazy hero business.' He'd probably crack some jokes about it too, like 'You're so young, your suit is probably still in training wheels!'
His reaction could be one of confusion. Fanfiction isn't really part of the pure - blood wizarding world he's used to. So seeing Harry doing something so different like cutting fanfiction would leave him scratching his head, not really understanding what Harry is up to or why he's doing it.
Ginny's reaction could also involve a sense of helplessness at first. But then she'd quickly gather herself and use her resources. For instance, she might call on her friends and family for help. She'd be by Harry's side constantly, using her presence to comfort him and also using her knowledge of magic to try and ease his pain.
In some fanfictions, Snape might be secretly sympathetic. He may see the scars as a reminder of all Harry has been through, which could soften his usually harsh attitude towards Harry, at least for a moment.
He might be amused. Fanfiction can be quite creative and sometimes funny, so he could just laugh it off and think it's an interesting take on the characters.
Well, Dudley might be jealous at first. He's always been used to being the 'big shot' in his own little world. If he finds out Harry is famous in fanfiction, he could start to feel overshadowed all over again. Maybe he'll try to downplay it, saying it's just some silly made - up stories.
Ginny may first be shocked and then filled with anger. She might immediately go to her family, like the Weasleys, for help. They together could come up with a plan to rescue Harry from the situation. She would also be by Harry's side constantly, providing him with emotional support, as she has deep feelings for him and wouldn't stand to see him suffer.
Their relationship could become deeper. Ginny would be more committed to Harry's well - being, and Harry would likely be very grateful to Ginny for her support. This could lead to a stronger bond between them, perhaps with more trust and a closer emotional connection.