The main characters are surely Team 7, but we can't forget about other supporting characters that could be added to the mix. Maybe some of the Akatsuki members from the past. Their presence could add an element of danger and mystery. If Team 7 travels back to a time when the Akatsuki was just forming, they might have to deal with their early plans and schemes. And then there are the village elders from the past, whose decisions and actions could be influenced by Team 7's presence.
Obviously, the main characters would be the members of Team 7, which include Naruto, Sasuke, and Sakura. Naruto, with his determination and never - give - up attitude, would be a key player in dealing with the challenges of the past. Sasuke, with his powerful ninja skills and complex personality, would also play an important role. And Sakura, who has grown into a strong kunoichi, would contribute with her medical and combat abilities.
Well, in addition to Naruto, Sasuke, and Sakura, Kakashi could also be a major character in this type of fanfiction. He might have some knowledge or connection to the time - travel event. Also, characters from the past that Team 7 interacts with can be considered important in the story. For example, the first Hokage, Hashirama Senju. His interactions with Team 7 could be really interesting as they come from different eras and have different values and goals.
There could also be characters from the past that become central to the story. For example, if they go back to the time of the First Hokage, Hashirama Senju could be a major character. Team 7 might interact with him, learn from him, or even have to work with or against him depending on the plot of the fanfiction.
Since I haven't read the 'Time Travel Team Seven Fanfiction', I can only guess. There could be a main character who is a brilliant scientist or inventor who is the mastermind behind the time travel concept. This character might be constantly tinkering with the time travel equipment to improve it or fix it. There could also be a young and curious character who is always eager to explore new time periods and learn about different cultures. And perhaps a wise old - timer type of character who has some prior knowledge or experience related to time travel that he or she imparts to the team.
Obviously, Kakashi is one of the main characters since it's about his time travel. Minato is also a central figure as he is part of Team Minato that Kakashi travels back to be with. And of course, the other members of Team Minato like Obito and Rin are likely to be important characters as well.
Well, Naruto would be the one to bring hope and his unique brand of optimism to the past. He could show the younger versions of characters how to be a better ninja. Sasuke, being the brooding and intelligent one, would analyze the situation of the past and figure out how to use their time - traveling advantage to the fullest. Sakura, she'd be a key player in both the medical and combat aspects. She could teach the past medics new techniques. And Kakashi, he's the experienced one. He'd be making sure the team doesn't make any rash decisions that could mess up the timeline further.
Obviously, the main members of Team Natsu like Natsu, Lucy, Gray, Erza, and Happy are always involved. They are the core of the group and any time travel adventure usually revolves around them.
Well, one possibility is that they could use their future knowledge to prevent some of the tragedies that occurred in the original timeline. For example, they might be able to save some characters who died. They could also change the relationships between different ninja clans, making the ninja world more harmonious. And perhaps they would train harder in the past to become even more powerful ninjas in the future.
Maybe an ancient and powerful ninja who was sealed away in the past and Team 7's time - traveling disrupts the seal. This ninja then sees Team 7 as a threat to his plans of ruling the world and becomes the antagonist.
Their relationships would likely become stronger. They would have to rely on each other more in the unfamiliar past environment. For example, Naruto might look up to Kakashi even more as he sees how much Kakashi has grown and changed. Sasuke might be more open to the idea of teamwork as they face challenges together in the past.
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.
Madara Uchiha could also be a main antagonist. If Naruto goes back to a time when Madara was still alive and plotting, Madara would surely oppose Naruto's attempts to change the future. He has his own grand plans for the world and wouldn't let Naruto interfere easily.