Mario Vargas Llosa on the most important character in a novel

From a technical point of view there are two essential things to solve or create when writing a novel. The first is the invention of the narrator. I think the narrator is the most important character in a novel. In some cases this importance is obvious because the narrator is also a central figure, a central character in the novel. In other cases, the narrator is not a character, not a visible figure, but an invisible person whose creation is even more complicated and difficult than the creation of one of the characters.