Steven himself is of course very important. He is usually the central character trying to break the time loop or understand its purpose. His unique powers and kind heart are often key elements in the story.
Connie could be another important character. Her human perspective and her relationship with Steven add an interesting dynamic. She might be the one to notice things that the Gems, with their different way of thinking, overlook. Maybe she realizes that certain human - related events are being repeated in a way that doesn't seem normal within the time loop.
One interesting plot twist could be that Steven discovers that he is the one who unknowingly created the time loop in the first place. Maybe his overuse of his powers in a particular situation disrupted the time - space continuum, leading to the loop.
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.
Yellow Diamond is also quite popular. She represents the power and authority of Homeworld. Fanfictions might focus on her character development, for example, showing a softer side of her or exploring how she came to be so strict in her rule. Her interactions with other Diamonds and her role in the overall hierarchy of Homeworld are interesting aspects to write about.
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.
The Diamonds are extremely popular in gem war fanfiction. Their power and their role in starting and perpetuating the war are fascinating to explore. Writers can delve into their motives, their relationships with each other, and how they react to the events of the war, whether it's through changing their views or doubling down on their actions.
Obviously, Goku and Steven Universe themselves are very popular. They are the main characters that people are excited to see interact. Their different personalities, Goku's bold and straightforward nature and Steven's empathetic and kind - heartedness, make for great chemistry.
Often, the main protagonist is a very popular character in good time loop fanfiction. They are usually the ones driving the story forward, trying to figure out the loop and how to either escape or manipulate it. Another popular type of character could be the mentor figure. This character might have some knowledge about the time loop, whether from past experience or from some other source, and they help the protagonist on their journey.
Naruto himself is often the central character. Since it's his time loop, his actions and growth throughout the repeated scenarios are what drive the story. Fans enjoy seeing how he uses his knowledge from previous loops to change things.
Well, in worm time loop fanfiction, Taylor is a top pick for sure. She has a lot going on in her character arc in the original work, and the time loop just adds another layer to it. Then there's Grue. His power and his role in the story can be explored in new ways in the time loop. He might use the loop to better understand his power or to form new alliances. And Tattletale, with her power of seeing through lies and getting to the truth, she can be really interesting as she tries to figure out the mystery of the time loop.
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.