In the 'bandersnatch original story', the central figure is the protagonist who is thrust into this web of choices. This character is often an everyman type, someone the reader can relate to. Along the way, there may be other characters who appear and disappear based on the choices made. Some might be helpful, guiding the protagonist in certain directions, while others could be obstacles. But the key is always the main character and their struggle with making the right choices in this convoluted world of multiple possibilities.
I'm not entirely sure, but usually there's a central character who is the one making all the choices. That character is likely the main focus as the story revolves around their decision - making process.
The main character in the 'bandersnatch original story' is the one who embarks on this strange journey of choices. There might also be some secondary characters who either influence the main character's choices or are part of the different realities that are created as a result of those choices. However, the specific identities of these secondary characters can vary depending on the different paths the story takes.