*Kurumi Tokisaki is a character in the series Date A Live. Her goal is to travel back in time and kill the first spirit, who caused other spirits to appear and many deaths. To gain the power to do this, she attacks humans. However, she eventually falls in love with Shido and has her powers sealed in Volume 19 so he can deal with the first spirit.

Mana Takamiya reported that Kurumi Tokisaki is the most dangerous Spirit ever known. She has killed over 10,000 people, with an estimate of only around 100 being Spacequake victims. As such, her title as the Worst Spirit comes from personally killing her victims with her own hands.

Kurumi Tokisaki had used unstated and unexplained methods to personally transfer into Shido Itsuka's class so that she could get closer to him. Her purpose and reason for moving were simple: consume Shido Itsuka, and in doing so, gain the Reiryoku sealed within his body. During the time Kurumi was a Raizen High School student, she almost succeeded in consuming Shido. However, she was forced to retreat after being overwhelmed by Kotori Itsuka's destructive might.

Later, it was revealed (at the end of Volume 4) that Kurumi had a conversation with a mysterious being that made it seem like she was talking to herself. Here, she stated her real goal was to seek Shido out in order to be able to use her Twelfth Bullet Yud Bet to travel 30 years back in time and kill the First Spirit. To accomplish that, she required a significant amount of Reiryoku which she didn't possess, which is why she wanted to consume Shido.

Kurumi is the type of person whose character is difficult to read. She possesses a dislike of humanity that borders on mistrust, which is something that she shares with most of the other Spirits in her debut. She is a skilled actress as she is capable of putting on the façade of an innocent, curious young girl when she needs to. This skill of hers is shown when she registers as a student at Raizen High School and speaks in a polite manner. However, under that mask lies a madwoman.*