Shikyou is an amanojaku, which is a type of yokai in Japanese folklore that causes mischief and harm to humans, making people act upon urges that they normally can suppress, such as cannibalism, murder, kidnapping, etc. Despite her apparent status as an amanojaku, Shikyou is also mainly the goddess of death and has unique and deadly powers. The main role of Shikyou is to return life to the gods by causing death. She knows Akari and she is Mai’s killer