Hermione Granger would definitely be a huge help. She's extremely intelligent and well - read in magic. She could study all the books in the library to find a way to break the time loop. Ron Weasley could also be important. His loyalty and courage would keep him by Harry's side through all the loops, and he might come up with some practical, if not always academic, solutions.
Dumbledore could play a major role. He has vast knowledge and experience. He might have known about the possibility of such a time loop and could guide Harry through it. Also, Luna Lovegood. Her unique perspective on magic and the world could offer insights that others might overlook. For example, she might notice some strange magical patterns related to the time loop that no one else does.
In most 'time loop Harry Potter fanfiction', Harry is front and center. His character development within the loop is usually the focus. But Hermione is a key figure too. She could be the one to discover the magical theory behind the time loop. For example, she might find a long - forgotten spell or potion that could be related to time manipulation. Ron, although sometimes overshadowed by Harry and Hermione, can bring in the element of friendship and loyalty. In some cases, characters from the Death Eaters side like Bellatrix Lestrange might be involved if the time loop is related to a major battle or a plot against Voldemort. Their presence can add more danger and complexity to the story.
The most common characters are Harry, Hermione, and Ron as they are the main characters in the original series. However, Voldemort also shows up a lot in these fanfictions. In a time loop, the writers might explore different ways of defeating him or different aspects of his character. Additionally, Luna Lovegood can be a common character. Her unique perspective might help in understanding the time loop better. For example, she might have some off - the - wall theory that turns out to be the key to breaking the loop.
One interesting plot twist could be that every time Harry repeats the day, a different character becomes aware of the time loop. For example, in one loop it's Hermione who figures it out and tries to help Harry break the loop in a very scientific way, using her vast knowledge. Another could be that Voldemort somehow gets a hint of the time loop and tries to use it to his advantage, like setting up different traps for Harry each time the loop restarts.
Dumbledore could also play a role. Even if he's not alive in the normal sense, his spirit or some form of his magic could guide Harry. He might have known about the connection between Harry and Excalibur all along and left behind some hints or instructions for Harry to follow.
Hermione could help. She's very smart and could research about the dragon's weaknesses.
Obviously, Harry Potter himself could be a main character. He has a natural inclination for getting into extraordinary situations, and a time - twister situation would be right up his alley. Hermione would also be a great main character as she's intelligent and has experience with time - related magic through the Time - Turner. Ron could be there too, providing his loyalty and humor in the face of time - twisting chaos.
Hermione could be a main character. As a very intelligent witch, she might assist Harry in his teaching, like helping him prepare complex lessons or providing additional knowledge to the students. For example, when Harry is teaching about ancient spells, Hermione could offer insights from the books she has read.
Hermione could be one. She could come to Degrassi to help Harry. She'd be really good at handling the academic side of things there, like helping students with their studies. And also, she could use her magic knowledge to figure out any magical mysteries.
Harry Potter himself is often a central focus. Since he's the main character in the original series, it makes sense that in time loop fanfics, his experiences in the loop are explored. Hermione Granger is also common. Her intelligence and problem - solving skills are often put to the test in the time loop scenarios. And of course, Ron Weasley, as Harry's best friend, is frequently involved as well.
Neville Longbottom could be a main character. He has always had the potential for great things and in a world without Harry, he would be likely to step into the spotlight. He has the courage and the connection to Hogwarts that could make him a central figure in the fight against evil.