Author (All Tomorrows)

The Author is the fictional author of the book All Tomorrows, as opposed to its real author C. M. Kosemen.

At the end of the book, it's revealed that it is told from the perspective of the author, an alien who is studying the now extinct humans. There is a picture of the author holding a billion years old human skull in a tentacle-like hand attached to the middle of his body.

The author does not now, how humanity went extinct, but in his opinion, it's the trip that matters, anyway.