D

D is a high ranking god who reincarnated Kumoko, the rest of her classmates, and her teacher, Oka-chan, into the other world upon their death at the beginning of the story. She was also in the classroom at the time but did not perish.

Appearance
D has the appearance of a beautiful second-year high school girl with waist-length straight black hair.

Personality
D cares more for her own personal amusement than anything else, but she's described to speak in a voice devoid of emotions. She is a playful self-proclaimed "Ultimate evil god", and most of the time states that she does things simply for entertainment. She seems to enjoy watching and interfering with Kumoko during her journey.

Plot
D is the one responsible for the students reincarnation into the other world. She also custom tailored the students' birth situations and abilities according to her perception of them.

Trivia

 * D is the manager of the Netherworld.