Definitely Iron Man. His high - tech gadgets and quick wit make him a great character to pair with the magic of Harry Potter. He can bring a new perspective to the magical world.
Thor is also quite popular. His god - like powers and his hammer are really cool elements. When combined with the magic of the Harry Potter world in time travel fanfiction, it creates some epic and exciting scenarios. For example, he could use his hammer to interact with magical spells or objects in the wizarding world.
Harry Potter himself is very popular. When he enters the Avengers' universe or interacts with them during time travel, his courage and magical abilities are really interesting to explore. Also, Hermione is often a favorite as she can use her intelligence to interact with the Avengers in unique ways.
Loki is another favorite. His mischievous nature means that he could cause all sorts of chaos during time travel. He might try to take advantage of the time - jumping to create his own power base in different timelines or even try to outwit Thanos in ways that the other Avengers can't.
Tony Stark is a likely focus. His intelligence and experience with technology, especially time - travel technology in the movies, make him a central figure. He could be the one to figure out the mechanics of time travel and lead the Avengers in their time - traveling adventures.
Thor and Hagrid are also frequently paired. Thor's god - like status and Hagrid's love for magical creatures create a unique bond. They might go on adventures together in the Forbidden Forest or something. And of course, Captain America and Dumbledore. Their leadership qualities are often compared and they can work together to lead the combined forces of the Avengers and the Hogwarts students against the bad guys in the fanfic world.
There might be a story where during time travel, the Avengers' powers mix with the magic of the Harry Potter world. So, Hulk could become even more powerful with a touch of magic, or Hermione could use her knowledge to help the Avengers understand some complex magical - scientific concepts. This creates a whole new set of challenges and adventures for both groups.
Definitely Harry. He often has to relive certain days or events in these fanfics, like the day of a big battle or the discovery of a major secret. Hermione is also frequently featured. She might be the one who first realizes they are in a time loop and starts researching ways to end it. Ron Weasley is another common character. He usually plays a supporting role, providing some comical relief or helping Harry and Hermione in their quest to escape the loop.
The Flash himself, of course. He is the central character and his ability to time travel is what drives most of the stories. Fans love to explore his different adventures through time.
Lightning is often a popular character in ffxiii time travel fanfiction. Her strong will and combat abilities make her a great candidate for time - traveling adventures. She can easily adapt to different time - period situations and often plays a key role in changing the course of events.
Vegeta is also quite popular. His pride and his constant strive for power can be really interesting when combined with time travel. He might go back in time to prove himself even stronger than he was originally or to correct past mistakes that made him look weak.
One of the most popular characters in Marvel time travel fanfiction is Doctor Strange. His connection to the mystic arts and his knowledge of time - related magic make him a natural fit for time - traveling stories. Another popular one is Loki. With his trickster nature, he can easily be written into time - travel plots, often causing chaos or using time travel to his advantage.
The theme of preventing disasters is also quite prevalent. Clint time - travels to stop an event that could lead to the destruction of the Avengers or the world. It adds a lot of tension and action to the story. He has to figure out what went wrong in the past and how to stop it, all while trying not to disrupt the entire timeline. Sometimes, he has to make tough choices between saving a single life in the past that could have a big impact on the future or letting that person die to keep the timeline intact.