Hermione, after stealing the books, might discover something really important in them. This could lead her on a new adventure, but she would have to face Harry's wrath when he finds out. She might then have to make a difficult choice between sharing the knowledge she found and making amends with Harry.
Harry might get really angry at Hermione. This could lead to a rift in their friendship, causing them to avoid each other for a while. Their other friends like Ron would then be caught in the middle, trying to mend the relationship.
The whole situation could attract the attention of the teachers at Hogwarts. They might start to investigate what's so special about those books. This could uncover a bigger mystery about the origin of the books, whether they are related to some secret society or a long - lost magic that the school doesn't know about yet. And Hermione and Harry would be right in the middle of it all.
Maybe she's desperate for some knowledge that she thinks Harry has in those books. For example, if the books are related to some dark magic or ancient spells that she wants to study for the greater good, she might be tempted to take them without asking.
The plot could start with Harry realizing he has deeper feelings for Hermione than just friendship. He might start spending more time with her, which causes tension between him and Ron. Eventually, he could confess his feelings to Hermione, and she might be conflicted because of her relationship with Ron.
The plot could develop with Harry trying to get his things back from Molly, which might lead to a series of confrontations.
Maybe Harry steals Hermione's Time - Turner because he has some desperate plan to go back in time and fix a big mistake. For example, he might want to prevent the death of a loved one, like Sirius. He could think that Hermione's Time - Turner is his only chance to do so.
He might go on the run and form an alliance with some unlikely characters. For example, he could team up with some dark wizards who also have a grudge against Gringotts. But this would be a very risky move for him.
If Hermione realizes her mistake and tries to make amends, it could lead to a deeper understanding between them. They might have to work through their feelings and have some difficult conversations. For instance, Hermione might have to explain her reasons fully, and Harry would have to decide if he can forgive her.
Yes, there are some out there. Some fanfictions explore this alternative relationship dynamic in interesting ways. They might rewrite the story's events and character interactions to make it seem more plausible for Harry to be with Hermione instead of Ron.
One possible reason could be that she is in a desperate situation. Maybe she needs something for a very important spell or potion to save someone's life and she thinks Harry won't notice or will forgive her. For example, if there is a rare ingredient that only Harry has access to and time is running out.
At first, Harry would be angry and confused. But as the story progresses, if Hermione has a valid reason for stealing the grimoire, they could start to repair their relationship. However, there would always be a shadow of doubt and a sense of unease between them. For example, Harry might be hesitant to share important things with Hermione in the future.
She would be furious. The Time - Turner is her precious possession, and Harry stealing it would be a huge betrayal in her eyes.