I'm not sure exactly who the main characters are without reading it. But it could be Twilight Sparkle as she is often involved in magical adventures. Maybe she discovers the time turner and is the central character in the story.
Well, one interesting plot could be the use of the time turner to fix a big mistake in Equestria's history. Maybe a character accidentally changes something crucial, and they have to use the time turner to set things right.
In some fanfics about Hermione and the Time Turner, it's often used as a plot device to fix mistakes. Maybe she goes back in time to prevent certain events from happening that had negative consequences in the original timeline. This can create a lot of interesting alternate storylines. For instance, she could stop the basilisk from being set loose too early, or she could change how she first met Harry and Ron, leading to different relationships and character developments.
A common theme is self - discovery. With the Time Turner, Hermione has more time to herself. She can explore her own interests and talents more deeply. For example, she might discover a new area of magic she's really good at. Another theme is friendship. Using the Time Turner often affects her relationships with Harry and Ron. Sometimes she has to keep secrets from them, which can strain their friendship but also make it stronger in the end when the truth comes out.
One common plotline is Hermione using the Time Turner to go back and change certain events in the wizarding world. For example, she might try to prevent some of the tragedies that occurred during the war. Another is her using it to relive certain moments with her friends, like spending more time with Harry and Ron in their earlier Hogwarts years.
One great fanfic could be about how the Time - Turner is rediscovered in the next generation at Hogwarts. A young wizard, perhaps the son or daughter of a well - known character, stumbles upon it. They then have to face the moral dilemma of using it, just like Hermione did in the original series. It could lead to some really interesting adventures where they try to correct past mistakes or prevent future disasters.
Hermione got a Time - Turner in the Harry Potter series. It was a very special device that allowed her to go back in time. This was crucial for her to attend more classes than were physically possible at once. For example, she was able to take both Muggle Studies and Ancient Runes at the same time slot. It also played a significant role in some of the adventures she had with Harry and Ron, like saving Sirius Black and Buckbeak. The Time - Turner was a magical yet dangerous object, as misusing time - traveling magic could have disastrous consequences, but Hermione managed it quite well most of the time.
In fanfiction, the Time - Turner can be a tool to bring Hermione and Snape closer. For example, if Hermione uses it to help Snape with a past event, he may start to trust her more. This newfound trust can change their relationship from one of animosity in the original story to a more collaborative and understanding one. They might share secrets and knowledge that they wouldn't have otherwise.
In MLP time travel fanfic, the theme of destiny often comes up. Ponies may travel through time to fulfill a certain destiny or to find out what their true purpose is. Another common theme is the interaction between different generations of ponies. When traveling through time, they meet ponies from the past or future, and this leads to interesting exchanges and growth. There's also the theme of adapting to new situations, as the time - traveling ponies have to quickly get used to the different rules and cultures of the time periods they end up in.
Try specialized Harry Potter fanfic forums. These are often filled with dedicated fans who write and recommend fanfics. For Hermione Time Turner fanfics in particular, you could ask in these forums if anyone has any good suggestions. Another place is Wattpad. Although it has a wide range of content, there are some great Hermione Time Turner fanfics hidden in there. You just need to dig a little by using the search feature.