|Occupation||High School Student|
Youko Tsukimori (月森 葉子, Tsukimori Youko) is a mysterious girl who appears to be the embodiment of perfection, gifted with outstanding beauty and excellent grades.
Youko is a beautiful girl with long black hair, almond-shaped eyes and snow-white skin. She is also has a slender figure.
She has a pleasing personality that made her rather popular. Supplemented by her outstanding grades and looks, Youko seems to be a perfect girl without anything to complain about. She is also good in sports and adored by every male in the school. Everyone's under the impression that she has already experienced a world unbeknownst to high school students; considering that she acts so maturely. According to Nonomiya, Youko stands out in their class and that she is of a different nature.
She came from a distinguished family and live in a luxury mansion. Her parents died recently after the series started.