Kumoko was formerly a female high school student in modern day Japan. She died and reincarnated into the form of a spider.

She is merely a spider with the memories of a student in the class that died and reincarnated.
In just two years, Kumoko became known as "The nightmare of The Labyrinth." She was feared as a man-eating god, and the "children" she left behind became known as "the remnants of the nightmare."