A theme that often appears is the idea of destiny. Are the doctor and the master fated to be enemies? Fanfics may play with this idea, showing that perhaps their destinies are intertwined in a more complex way than just being adversaries. There's also the theme of friendship or a strange kind of kinship that exists beneath their enmity, which is explored in many 'doctor x master fanfic' stories.
One common theme is the eternal struggle between good and evil. The Doctor represents good and the Master represents evil, and their fanfics often explore this dynamic. Another is the idea of redemption. Sometimes the Master is shown to have a chance at redemption through his interactions with the Doctor.
Another theme is redemption. Some fanfictions explore the possibility of the master changing his ways and finding a new purpose, often with the doctor's help or influence. It's about the master breaking free from his evil tendencies. In these stories, the doctor serves as a sort of moral compass for the master. This can be seen in stories where the master starts to question his actions after spending time with the doctor.
There are likely some out there. You could search for it on platforms dedicated to fanfiction. Keep in mind that the 'yaoi' genre often involves male - male relationships in a fictional context. So, when you search, make sure to respect the rules and guidelines of the platforms.
Some fanfictions focus on a different timeline where the Doctor and the Master were friends from the start. It could show how their adventures together would be different. They might use their combined intelligence to solve problems across the universe and have a more harmonious relationship compared to their canon interactions.
A prevalent theme is the exploration of the unknown. The fem doctor may be used to her own world of medicine and science, while the master might be from a different realm. Together, they face things neither of them fully understand. Also, redemption can be a theme. Maybe the master has done some wrong in the past, and the fem doctor becomes a catalyst for his change. And of course, there's the theme of personal growth. Both characters grow as individuals as a result of their relationship.
One common theme is the eternal struggle between good and evil. The Thirteenth Doctor represents good, while the Master is often the face of evil. Their interactions are full of this push - and - pull dynamic.
Well, while 'fanfic' often has a wide range of content, if you look hard enough, you can find ones that are family - friendly. Look for stories that are more about their character development, their shared goals, or their unique bond that doesn't involve any inappropriate themes. Some might focus on how they overcome challenges together in a positive and clean - cut way.
You can also check out FanFiction.net. Although it has a broader range of content, you can still find 'doctor x master yaoi' fanfiction if you search thoroughly. Look for relevant categories or tags related to the two characters and the yaoi genre.
First, study their characters well. Know their motives, personalities, and how they interact in the original series. This will make your story more believable.