D

D is a high ranking god who reincarnated Kumo/Shiraori and the rest into the other world upon their death in the classroom. She was also in the classroom at the time but did not perish. On Earth her name is Wakaba Hiiro. She is a playful self-styled "Ultimate evil god", and most of the time claims to do the things she does simply for fun. She keeps interfering with while at the same time advising Kumo during her journey.

Trivia

 * D is the manager of the Netherworld.