Not having read the 'bimbo tf story', it's impossible to accurately name the main characters. However, it's likely that there is a central figure who goes through the 'tf' (transformation) into a bimbo - like state. There might also be supporting characters like friends, family members or antagonists who either encourage, oppose or are affected by this transformation.
I'm not sure specifically what the 'bimbo tf story' is about without more context. It could be a transformation story related to the 'bimbo' concept, perhaps about a character's transformation into a bimbo in a fictional narrative.
Most likely the main characters would be the well - known TF2 characters like the Scout, Soldier, Pyro, Demoman, Heavy, Engineer, Medic, Sniper, and Spy.
In a possible 'tf2 love story', the main characters could be the Heavy and the Pyro. The Heavy is strong and protective, while the Pyro is a bit of an enigma. Their relationship could be based on the Heavy's natural inclination to protect the more unpredictable Pyro. Maybe in the story, the Pyro shows a side of themselves that only the Heavy gets to see, and that forms the basis of their love story.
Since I don't know the exact 'inanimate tf story', I can't say for sure. But it could be the inanimate objects themselves that are the main characters, like a key that is the protagonist in a story about unlocking secrets and it transforms during the process.
Not having read the'reader tf story', it's impossible to accurately name the main characters. But in a general sense, if the story is about a reader's journey, the reader would be a key character. There could be a mentor - like figure who guides the reader in their exploration, maybe an old - fashioned bookseller who imparts wisdom about different books. Or there could be antagonists, like someone who tries to stop the reader from reading or a character from a book that escapes into the real world and causes trouble for the reader.
Without knowing the specific 'dragon tf story', we can only make assumptions. The dragon is surely a central figure. If it's a story about the dragon's transformation due to a curse, there could be a character who cast the curse, like an evil witch or a vengeful mage. On the other hand, if it's a more positive transformation story, there could be a wise old mentor figure who guides the dragon through its new form. And there may be other characters like villagers or townspeople who are affected by the dragon's transformation and play important roles in the story.
I'm afraid I don't have enough information to name the main characters precisely. However, if it's a story about a girl turning into a jackal - like being, there could be characters who help her through the transformation process. Maybe there's a wise old mentor figure, or perhaps there are other characters who are also going through similar transformations. And of course, there could be antagonists who oppose the jackal girl for some reason, like a group that fears or hates her new form.
Since I don't know the exact 'Spider Girl TF Story', I can't say for sure. But most likely, Spider Girl herself would be a main character.
Given the title 'shark girl tf story', the obvious main character is the shark girl. But there could be other supporting characters. For example, if the story is set in a coastal town, there might be fishermen who have seen strange things related to the girl. Or if it's a story about her fitting into a new world, there could be other 'creatures' or people in that world who interact with her. There could also be a mentor - like figure who helps her understand and control her new form or abilities if it involves a transformation.
It's possible that the main character is a young boy who is on the verge of puberty. Alongside him, there could be his family members, such as his mother who provides emotional support and his brothers who he might compete with or learn from. There could also be a teacher or a coach who plays an important role in his growth and transformation.