D

D is a high ranking god who reincarnated Kumoko, the rest of her classmates, and her teacher 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 to reincarnate into the other world. She also custom tailored the students' birth situation and abilities according to her perception of them.

Trivia

 * D is the manager of the Netherworld.