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.
Hermione might become more distrustful of Ron. After being saved by Lucius from Ron, she could start to see Ron in a different light, perhaps as someone with a darker side she hadn't fully recognized before. This could make her more cautious in her interactions with him.
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.
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, perhaps he uses his influence in the wizarding world. Maybe he has some connections or knowledge that allows him to intervene and get Hermione out of the abusive situation. For example, he could use his status among the pure - blood families to put pressure on the abusers.
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.
Maybe Lucius wants to gain an advantage. He could see Hermione as a powerful witch with knowledge that he can use for his own ends. By saving her from Ron's beaten, he hopes to earn her gratitude and get access to her skills or information.
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 Ron is under the influence of a dark spell that makes him act aggressively towards Hermione. Severus, being observant, notices this and steps in to protect Hermione. He uses his potions knowledge to create an antidote for the spell on Ron.
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.