Tokisaki Kurumi

The third spirit that appears in the series. The most brutal spirit to appear in the series. Her Astral Dress is made out of crimson and black frills, giving her the appearance of a Gothic Lolita. Her left eye is an inorganic clock face, with the clock hands moving in the opposite direction, representing her life. She transfers into Shido's class in Volume 3. She is attracted to Shido from the very start, gaining the ire of Tohka and Origami. She is very aggressive in her actions, causing Shido to be bewildered during his mission on making her fall in love with him. She has a history with Mana, as Mana has been repeatedly killing Kurumi, but fails due to the fact that Kurumi keeps reappearing thanks to her Angel, Zafkiel.

Her Angel, which takes the form of a massive clock face with a rifle and a handgun of intricate designs taking the place of the minute and hour hands of the clock, allows her to control time. She is able to summon her past selves to fight or take her place as they are essentially Kurumi herself. This not only allows her to cheat death by summoning herself from before her death, but also makes it more difficult for Shido to reach her; even if Shido is able to persuade Kurumi, another self may come forth and kill her for weakness, circumventing any emotional persuasions the same way as physical injuries. The twelve Roman numerals on the clock has different powers that only the original Kurumi can use. Her power causes her life to be eaten away, the clock hands on her eye rapidly turning in the clockwise direction each time she uses Zafkiel's power. This forces her to obtain 'time' from outside sources, specifically from killing other humans. She reveals to Shido that she transferred to Raizen High School in order to eat him, or specifically the power that he has within him. She was defeated in the start of Volume 4 by Kotori, with a fourth Zafkiel's clock face and her left arm blasted away by Camael. Her AST codename is Nightmare.