Not every character has to be relatable. While you can benefit from having relatable heroes, villains, or even side characters, there's no mandatory pre-requisite that says a good book must have such characters—or even that compelling characters have to be relatable.

Why do characters need to be relatable?

And that is exactly what makes a character relatable: their humanity. Forging the reader-character connection is all about encouraging readers to empathize with your characters in some way. For readers to extend empathy, they must recognize the humanity in your characters' experiences or circumstances.

Do all stories need to be relatable?

It all matters, and it all adds to the story's personality. It's what makes it more real, for everyone. ... Stories need to be relatable because stories are not just for entertainment. They all have messages, even satires.