Obviously, the 12th Doctor himself is a central character. Then there's Clara, his companion. Their relationship is often explored during the regeneration process, as she might be there to witness it or even have some influence on how it unfolds. Another common character could be the TARDIS. It's an important part of the Doctor's life, and in fanfiction, it might react in unique ways during the regeneration, like the console lights flickering in a special pattern.
In many fanfictions, the 10th Doctor's emotional journey during regeneration is complex. He not only has to deal with the physical pain of the process but also the emotional turmoil. He may be afraid of what the new version of himself will be like. There are also memories of his past regenerations flooding back, adding to his distress. And his relationships with his companions play a huge role. He might worry about how they'll react to his new form, and whether they'll still be by his side. All these emotions are often explored in great detail in fanfictions.
The main character would surely be the 10th Doctor himself. His companions, depending on the era, like Rose Tyler or Martha Jones, could also be main characters. They play important roles in how the Doctor adjusts to his new form.
Well, it could be about many things. Maybe it focuses on the early days of the 10th Doctor's regeneration process, like how he copes with his new body, new personality traits that start to emerge, and his first encounters with old and new enemies. It might also explore the reactions of his companions during this initial phase.
His companions like Amy Pond and Rory Williams are often involved. They are important as they have been with the 11th Doctor through many adventures and their reactions to his regeneration are crucial parts of the story.
One interesting idea could be exploring the Doctor's internal conflict during the regeneration process. He might be grappling with memories of his past selves and the adventures he had. Another could be how his companions react to the sudden change. They may be in shock or try to help him through the difficult transition.
One interesting idea could be exploring the Doctor's internal conflict during regeneration. He might be grappling with memories and emotions from his 12th incarnation. For example, his relationship with Clara could play a role in how he approaches regeneration, perhaps having visions of their adventures together and feeling reluctant to let go of that part of his life.
Well, it varies in different fanfics. The 11th Doctor could be hurt by powerful villains, or maybe in trying to save someone. It could also be from internal conflicts or emotional stress.
It could be due to various imaginative plot devices created by the fanfiction author. Maybe in a battle with a powerful villain or during a risky adventure.
The Daleks could be the main villain. They might be trying to manipulate the Doctor's regeneration to create chaos in the time - space continuum. Since the 9th Doctor's unexpected jump to the 11th Doctor disrupts the normal flow, the Daleks could take advantage of this instability to further their evil plans of universal domination.