The Master of the Labyrinth

The Master of the Labyrinth (Hangul: 미궁의 주인) is the final boss encountered White Day: A Labyrinth Named School and Remake. In the original game she is a spirit/entity of unknown origin who has the ability to posses body's of other people, while in the remake she is the result of the spirit of Seong-a feeding off the negative energy and emotions of the school.