Goku is, without a doubt, one of the most popular. His constant pursuit of strength and his ability to overcome seemingly impossible odds make him a favorite for fanfiction writers. They can create all kinds of new adventures for him, like facing off against cosmic threats even greater than what he's encountered in the shows.
The main characters include Goku. He is the protagonist, a Saiyan sent to Earth. Then there's Bulma, a smart scientist who helps in the search for the Dragon Balls. Krillin, Goku's best friend and a fellow martial artist. Vegeta, a proud Saiyan prince who later becomes an ally. And Master Roshi, an old and wise martial arts master who trained Goku and Krillin.
Well, having Dragon Ball characters in fanfiction often brings in a wide fan base. Also, their established traits and story arcs offer a solid foundation for creative plots and character interactions.
The height of a character in a novel was usually determined by the environment, age, character setting, and other factors.
In some fantasy or science fiction novels, the characters may be very tall because there are often supernatural creatures such as giants and dwarves in these novels, and the characters usually play the image of these creatures.
In other novels, the height of the characters may be more average, but sometimes there are special height ranges. For example, the protagonist may only be about 1.5 meters tall while the villain may be more than 2.0 meters tall.
The height of a character in a novel was usually set according to the needs of the story. Different settings would bring different visual feelings and character images.
Bardock is often a popular character in 'dragon ball minus fanfiction'. His story has a lot of potential for expansion as he was a key figure in the Saiyan backstory. Gine, Goku's mother, is also popular as she gives a more maternal aspect to the Saiyan race that we don't see much in the original series.
Probably Goku would still be one of the main characters. He's the face of Dragon Ball after all. Vegeta is also likely to be a main character as he's always been an important part of the story. Maybe there are new characters created specifically for the fanfic that also become main characters, but without reading it, it's hard to say for sure.
Goku is the main character in the Dragon Ball origins story. He's the one the story mainly follows from his early days. Also, Grandpa Gohan is important as he found and raised Goku. And Bulma is another main character. She's the one who introduced Goku to the concept of the Dragon Balls.
As I don't know the exact details of this novel, it's difficult to say for sure. But it might introduce new versions or aspects of the existing wives' characters, making them unique in some ways.