Maybe the main characters are a group of rebels from the 4th and the ruling class from the 12th. The rebels are fighting for change, and the ruling class is trying to maintain the status quo. Their meetings and clashes can create a lot of drama and conflict in the fanfiction.
It's hard to say without more context, but they could be two characters who are ranked 4th and 10th in a particular system. For example, in a school of magic, the 4th best student in one class and the 10th best in another class meet.
In this fanfiction, it's Harry, the boy wizard from the magical world of Hogwarts. And then there's the 9th Doctor, a time - traveling alien with his own set of skills and a big blue box called the TARDIS. They are the central figures around which the story would revolve.
Well, of course, Rose and the 11th Doctor are the mainstays. Rose, with her charm and tenacity, is always ready for new challenges. The 11th Doctor, with his bow tie and fez, is the one leading the adventures. However, in some fanfictions, new characters might be introduced that are unique to the fan - created story. But overall, it's Rose and the 11th Doctor that the story revolves around as they embark on time - traveling escapades, face danger, and discover new things about the universe.
The main characters are, of course, the 11th Doctor and Rose. The 11th Doctor, with his unique personality, is full of energy and quirkiness. Rose, on the other hand, is a strong - willed and adventurous character. Their combination makes for an interesting dynamic in the fanfiction.
It could be the Daleks. They are a classic Doctor Who villain. They might see the meeting of two Doctors as a threat to their plans for universal domination and try to stop it.
The main characters would surely include the 11th Doctor. He would bring his TARDIS, sonic screwdriver and all his time - lord knowledge into the mix. From Torchwood, Toshiko Sato could be a significant character. Her expertise in technology and her rather shy yet intelligent personality could add depth to the story. She could potentially help the Doctor with some of his more complex technological problems, and in return, the Doctor could expose her to things she had only dreamed of in her scientific pursuits.
The main characters are, of course, the 11th Doctor and Rose. The 11th Doctor is known for his energetic and somewhat eccentric personality. He has his signature bow tie and fez. Rose, on the other hand, is a strong - willed and adventurous character. She has her own set of skills and experiences from her previous travels with the Doctor.
The '4th meets 10th fanfiction' might be a story where the 4th entity has a certain goal or mission and during that journey, they cross paths with the 10th. They could then team up to face a common threat or solve a mystery that neither could solve alone. For example, if they are from different magical realms, their combined powers could be the key to saving both realms from a dark force.
Perhaps it could be a story in a school setting where the 4th grade students meet the 12th grade students. There could be a lot of misunderstandings at first because of the age difference. But then they discover they have common interests, like a shared love for a particular sport or art form. They work together to overcome some school - related challenges, like saving a club from being shut down.
I'm not able to recall the main characters in the Decameron's 5th day 4th story precisely. However, in the Decameron, characters often include young lovers, wise elders, and cunning servants. It's possible that the 5th day 4th story also features such types of characters, who get involved in complex relationships and situations that drive the plot forward.