Obviously, Harry, Hermione, and Ron are always popular since they are the Golden Trio. But other characters like Sirius Black often feature prominently. In time travel fanfictions, Sirius being alive in a different time period can add a lot of interesting dynamics. Dumbledore is also quite popular as his wisdom can play a crucial role in the altered timelines. And of course, Voldemort remains a central figure as the main antagonist that the Trio is trying to outwit in the different time periods.
Well, a cool plotline is when the Golden Trio travels back to the Triwizard Tournament. They could use their future knowledge to help Cedric survive. Maybe they can stop Barty Crouch Jr. from impersonating Mad - Eye Moody and causing all that chaos. They might also be able to change how the tasks are completed, making it more of a fair competition. And think about the interactions they'd have with the other champions! They could form alliances and share magical knowledge that wasn't available at that time.
One common theme is the idea of fixing past mistakes. The trio often travels back in time to prevent certain bad events from happening. Another theme is self - discovery. Through time travel, they learn more about themselves and their capabilities. And of course, there's the theme of friendship. Time travel usually tests and strengthens their bond as friends.
One great 'Harry Potter Golden Trio Time Travel Fanfic' is 'All the Wrong Choices'. It has an interesting take on how the trio's time travel changes things. Another is 'Back in Time', which really delves into the characters' emotions as they experience time travel and face their past and future. There's also 'Time Warped', which has some unique plot twists related to the time travel concept.
They might try to change certain events. For example, they could attempt to save Sirius earlier. Maybe they'd use their knowledge of future events to outwit Voldemort's plans more effectively in that time period.
Hermione would start by studying all the new things she could find. Ron would follow Harry's lead most of the time. Harry would use his instincts to figure out who to trust in this new future.
There's a fanfiction called 'First Year Redo'. In this story, the Golden Trio goes back to their first year and decides to focus on befriending some characters they didn't get to know well before. They also use their knowledge to prevent some small, but annoying things that happened in their first year from occurring again. It's a heartwarming story that shows how much they've grown since their first year at Hogwarts.
A lesser - known but great one is 'Time - Twisted Bonds'. In this story, the time travel element is used to create unexpected alliances and conflicts between the Golden Trio and the Black Sisters. It starts off with a bang as the characters are thrust into the different time periods, and the plot unfolds in a very thrilling way.
Harry would likely be the brave and impulsive one. He might be the first to jump into action when they face challenges during their time - traveling adventures. His role could also be to use his natural leadership skills to guide the group.
One interesting concept could be how the Golden Trio - Harry, Hermione, and Ron - deal with changing the past and the potential consequences. For example, they might try to prevent certain tragedies from the original story, but in doing so, create new and unforeseen problems.