Writing fanfic about real people can be a bit of a gray area. While it can be a form of creative expression, it should be done in a respectful way. If the fanfic involves inappropriate or false content that could harm their reputations, it's not okay. However, if it's a positive and fictional story that doesn't cross any boundaries, some may see it as acceptable.
In the 'last man on earth Karl story', Karl is the central figure. He could be an ordinary person who was thrust into this extraordinary situation of being the last human. Maybe he has certain skills or qualities that help him survive, or perhaps he has to learn quickly how to endure in this new, lonely world.
Friendship could be a great theme. They could be on an exciting adventure together, helping each other out in challenging situations. Maybe they're exploring a new city or trying out a new extreme sport.
I don't know the exact genre of the 'Esme and Tanner' novel. It could be a romance novel if the story focuses on the relationship between Esme and Tanner. Maybe it's a coming - of - age story if they are young characters growing and learning throughout the book.
Janet Tanner could be an author or a character within the context of Fantastic Fiction. Without more specific information, it's hard to say precisely. It might be a name specific to a certain genre or series within the Fantastic Fiction realm.
The main characters are Tanner and Esme. Tanner might be a character with a complex backstory, perhaps he has had some difficult experiences in his past that shape his behavior and attitude in the novel. Esme, on the other hand, could be a character who brings a different perspective. She might be more optimistic or more in touch with her emotions. Their interactions and how they react to each other are likely to form the core of the story in this novel.
I'm not sure specifically as I haven't read this particular 'Esme and Tanner' novel. But usually, the main characters would be Esme and Tanner. They are likely to be the ones around whom the story's plot, conflicts, and character development revolve.
Since we don't know what Tanner Mayes' stories are about, it's impossible to say if they are suitable for all ages. If they are educational or simple moral tales, they might be fine for all ages. But if they contain complex themes or some degree of violence or other inappropriate content, they may not be suitable for younger audiences.