Fictional documentaries often blend elements of reality and imagination. They might present made-up stories in a documentary-style format to make a particular point or evoke certain emotions.
The term commonly used is the 'story world'. It comprises everything from the physical aspects to the cultural and social aspects of the fictional place in the novel.
The term for the opposite of an empath is often referred to as a 'psychopath'. A psychopath typically lacks empathy and has a different set of emotional and behavioral traits.
The term is usually 'fictional infatuation'. This means having a deep interest or love for a made-up character. It can involve imagining scenarios with them or having strong emotional connections.