Ron might use his Weasley family's unique magic items to save Hermione. For example, if he had a special charm from his mother that could repel dark creatures like Greyback. He just needs to activate it at the right moment when Greyback is closing in on Hermione.
One possible scenario could be that Ron uses his quick thinking and a powerful spell to stun Greyback just as he's about to attack Hermione. Ron might have been lurking in the shadows, waiting for the perfect moment to strike and save his friend.
In the fanfiction, it could be that Ron is consumed by jealousy or a false belief. This causes him to lash out at Hermione in a way that endangers her. Fred, having a protective streak, especially towards his friends, jumps into action. He might engage Ron in a duel of sorts, not with the intention to harm but to subdue him long enough to break whatever spell or negative emotion has a hold on Ron and thus save Hermione.
There's a fanfiction called 'Greyback's Redemption Arc'. In it, Fenrir Greyback saves Hermione from a group of Death Eaters. The author might have written it to explore the idea of redemption for a character like Greyback. Maybe he saves Hermione because he sees her as a symbol of the good in the wizarding world that he has lost touch with, and this act of saving her could be the start of his journey towards redemption.
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.
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.
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.
It's likely that the fanfiction will have intense action scenes. Beast Boy would need to be very strategic in saving Raven. He can't just rush in blindly. His ability to transform into different animals gives him an edge, like turning into a bird to quickly reach her or a strong animal like a bear to fight off the enemies.
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.
Well, it could be that Snape has been secretly observing Ron's erratic behavior towards Hermione. When the situation gets out of hand, he intervenes. He might use his position as a teacher to discipline Ron and in the process, saves Hermione. Snape is a complex character with a lot of power and knowledge, so he could use various means like his occlumency skills to sense the danger Hermione is in and act accordingly.
One possible plot could be that Hermione stumbles upon Fenrir Greyback in a situation where he's about to be killed by some dark wizards who see him as a loose end. Hermione, being the empathetic and brave witch she is, decides to save him. Maybe she believes that every life is worth saving, even a werewolf like Fenrir. She could then try to rehabilitate him, using her vast knowledge of magic and her strong moral compass.