In this fanfiction, it could be that Ron is under the control of a powerful wizard who wants to get to Hermione for some reason. Charlie discovers this plot and decides to protect Hermione. He sets up various traps and wards around the place where Hermione is staying. When Ron, being controlled, tries to attack Hermione, Charlie is there to intercept him, engaging in a magical duel if necessary to save Hermione.
Charlie might be a character who has known Hermione for a long time, maybe through some other connections in the wizarding world. He sees Hermione as someone in need of protection from Ron, whether Ron is acting out of his own accord or is being influenced by external forces. In relation to Ron, he is the one who stands against Ron's actions towards Hermione.
Perhaps in the fanfiction, Cormac invites Hermione to a secret gathering, but his intentions are not so noble. Ron finds out and races to the location to save Hermione. This act of heroism by Ron might make Hermione question her feelings for him. She might start to see him as more than just a friend, especially if Ron shows a side of himself that she hasn't fully appreciated before. The story could then follow how their relationship evolves from this event.
One reason could be Snape's sense of justice. Despite his often - cold exterior, he may not tolerate Ron's unjust behavior towards Hermione. Another reason might be that he sees something in Hermione that he values, like her intelligence or her thirst for knowledge, and doesn't want it to be extinguished by Ron's actions.
Draco might be motivated by jealousy. He could be jealous of Ron and Hermione's friendship or a possible romantic relationship between them. So he tries to harm Hermione out of spite.
Another plot twist could be that Lucius's act of saving Hermione causes a rift between Hermione and Ron that is hard to repair. Ron might misunderstand Hermione's connection with Lucius and think she is now on the 'dark side' so to speak. This could lead to a complex love triangle situation where Hermione has to prove her loyalty to her friends while also dealing with her gratitude towards Lucius.
In fanfiction, it could be that Charlie has a more mature understanding of Hermione's intellectual pursuits. Ron sometimes struggles to keep up with Hermione's thirst for knowledge. Charlie, with his own expertise in his field, might be able to engage Hermione in more in - depth conversations, leading her to consider a relationship with him instead of Ron.
In many fanfictions where Ron saves Hermione from Cormac, it often showcases Ron's protective side. Maybe Cormac was being too pushy or overbearing towards Hermione, and Ron steps in. It could be a moment that solidifies their relationship in the fan - made story, showing that Ron truly cares for Hermione and is willing to put himself in a difficult situation to protect her.
One possible plot could be that in a dark and alternate version of the wizarding world, Ron has been influenced by some dark magic or a powerful enemy who has turned him against Hermione. Lucius, for his own reasons (maybe to redeem himself or because he sees the value in Hermione), steps in to save her. He might use his powerful family connections and knowledge of dark magic to counter whatever threat Ron poses.
Well, in some versions, Ron might use his quick wit and knowledge of Hogwarts' secret passages to outmaneuver Draco. He could lead Hermione to safety through a passage that Draco doesn't know about.
Well, it could be that Lucius uses his powerful influence in the wizarding world. Maybe he intimidates Ron with threats related to his family's status or he uses some dark magic to create a distraction and whisk Hermione away.