In a 9th Doctor and child companion fanfiction, the adventures they embark on would be quite different from his usual ones with adult companions. The child might be more inquisitive about the simple things that the Doctor takes for granted, like how the TARDIS works. This could force the Doctor to explain things in a more basic and understandable way, which in turn could make him see his own world in a new light. And of course, the danger they face would be even more intense as the Doctor would feel an extra sense of protectiveness towards the child.
Well, in a great 9th Doctor and the child companion fanfiction, the author needs to capture the essence of the 9th Doctor's personality accurately. He was a bit rough around the edges but had a good heart. The child's character should be well - defined too, with their own quirks and interests. The plot could involve the Doctor taking the child to different time periods to solve a mystery. This would not only be exciting but also give the opportunity for the child to learn and the Doctor to show his knowledge. Additionally, the fanfiction should have some humor, like the child making innocent but funny remarks about the Doctor's strange appearance or the TARDIS.
They could also meet in a time - locked situation. The 12th Doctor is trying to solve a mystery from his past, and the 13th Doctor stumbles upon the same situation in her present. At first, they don't understand how they are both involved, but as they start to piece things together, they discover that it's all part of a much larger, more sinister plot. Along the way, they might meet some old friends or foes from their respective tenures as the Doctor. And in the end, they work together to outwit the mastermind behind the plot, all while having some really interesting conversations about their experiences as the Doctor.
In some fanfictions, the 10th and 11th Doctor are brought together by a time anomaly. They are forced to cooperate to fix it, and along the way, they encounter old friends and enemies. The contrast between the 10th's more traditional style and the 11th's more zany approach creates interesting dynamics. They might also have to deal with the consequences of their previous actions in different timelines, which adds an extra layer of complexity to the story.
In the fanfiction, the 11th doctor, with his eccentric and energetic personality, could initially be a bit confused by the 13th doctor's more modern approach. But then they could start to combine their wits. For example, the 11th doctor's knowledge of ancient alien races could be paired with the 13th doctor's understanding of current galactic politics. They could work together to save a planet that is on the brink of destruction due to a complex web of time - related issues. The encounter could also lead to some humorous moments, like when they argue about who has the better sonic screwdriver or who has had the more exciting adventures.
In such fanfiction, a vampire companion could be both charming and dangerous. They might have a thirst for adventure and a hidden agenda. Also, their vampire nature could lead to some interesting plot twists and challenges for the Doctor.
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.
In fanfiction, when the 13th Doctor meets the 11th Doctor, there could be a lot of chaos and fun. They might exchange stories about their adventures. Maybe they would team up to fight a common enemy that spans across their different timelines.