Izuku Midoriya would be a great choice. His determination and analytical mind would make it interesting to see how he deals with a time loop. He could use his knowledge from each loop to better himself and his classmates.
Perhaps Ochaco Uraraka. Her kind heart and unique quirk could play a big role in the time loop. She could use her quirk in creative ways during the repeated events. Also, her friendly nature might help her bring the class together to figure out how to break the time loop or at least make the best of it.
Bakugo could also be the main character. His hot - tempered nature might initially make him frustrated with the time loop, but as he goes through it, he could learn to control his temper better and use his power more effectively. He might be forced to cooperate with his classmates in ways he never thought possible in the time loop.
Robin could be the main character. He is often the leader, so it would be interesting to see him struggle with a time loop, trying to figure out how to break it while still leading the Teen Titans.
It could be Kronos. Maybe he's found a way to trap Percy in a time loop as part of his plan to stop Percy from fulfilling his destiny. Each time Percy breaks free from the loop a little, Kronos throws new challenges at him.
In a 'class 1 a time loop fanfiction', consider a plot where a quirk malfunction causes a time loop. For example, one of the students' quirks goes haywire and traps the whole class in a loop. They first think it's a dream but soon realize it's real. In the loop, they could explore relationships within the class more deeply. They might find that some characters who seem tough are actually very vulnerable in certain situations. And as they keep repeating the day, they start to notice small details about their classmates' behaviors that they didn't before, which could lead to stronger friendships or new revelations about their powers.
Perhaps it's a result of a failed experiment by one of the village's scientists or ninjas. They could have been working on some kind of time - space ninjutsu and something went wrong. Naruto just happened to be in the wrong place at the wrong time. It might be someone like Shikamaru, who is known for his intelligence and might have been trying to create a new strategy involving time manipulation but it backfired on Naruto.
Sasuke could also be a character who breaks the time loop. He is highly intelligent and has a thirst for power and knowledge. If he realizes that he is in a time loop, he would likely be very intrigued and start investigating. His Sharingan might give him some insights into the nature of the loop and help him find a way to break it.
Typically, the focus is on Naruto, Sasuke, and Sakura from Team 7. Naruto's never - give - up attitude is likely to be a driving force in trying to break the time loop. Sasuke's power and his complex personality add depth to the story. Sakura, on the other hand, with her skills as a ninja and her relationship with the other two, is an important part of the exploration of the time - loop concept in this fanfiction.
Well, Arya Stark has a good chance. She's highly adaptable and has been through so much. Her skills as a Faceless Man could potentially be used to discover the secrets of the time loop and break it. Also, Jon Snow. He has a special connection to the North and has faced death and come back. His unique position and the respect he commands could help him find a way to end the time loop. And then there's Tyrion Lannister. His intelligence and ability to think outside the box might lead him to the solution to break the loop.
It could be the thief of time themselves. We could get to know their motives, their daily life of stealing time, and their inner thoughts. It would be a very unique perspective.
I don't know for sure since I don't have the details of this specific '7th time loop novel'. But usually, there would be a protagonist who is experiencing the time loop, and perhaps there could be a sidekick or a love interest who helps or hinders the protagonist's progress within the loop.
I'm not sure specifically as there could be various main characters depending on the story. It could be a young couple, like a boy and a girl who find themselves in the time loop and their relationship is at the center of the story.