Kurumi Tokisaki

Kurumi Tokisaki, also known by her codename, "Nightmare" is an antagonist in the anime Date A Live, and a Spirit, a mysterious, highly powerful being capable of causing highly destructive distortions in the space-time continuum known as "space quakes", as well as possessing superhuman powers. Spirits can be neutralized one of two ways: Either by killing them, an act carried out by a special Anti-Spirit Team or if their powers are sealed, a power the series protagonist Shido Itsuka happens to possess (convenient!), however, in order to seal their powers, he must first get the Spirit to fall in love with him.

Kurumi, however, has other ideas, namely to used the power of the sealed spirits within Shido to power her time travel ability, and prevent the first appearance of Spirits 30 years ago. Kurumi has an number of superhuman abilities, making her the most dangerous Spirit yet encountered: She possess two magic flintlock firearms, a pistol and carbine, which behave more like semi-automatic weapons, being able to be fired a seemingly endless number of times. Kurumi can also summon a clock and place the weapons like hands of a clock. Depending on the time she designates, she will summon a different "magic bullet", which will will not harm the target physically, but have a time manipulating effect. These bullets can be used on herself or a target, depending on the effect, with varying results including superhuman speed, slowing their speed, stopping them completely, rewinding time for the target (effectively allow the target, usually Kurumi herself, to regenerate from wounds), and causing the target to travel through time, though his requires a prohibitively large amount of mana. Her powers also have the cost of slowly draining her life force with each use.

The other reason Kurumi is considered to be so dangerous is that she is exceedingly violent and sociopathic, seeming to derive great, possibly even sexual pleasure in committing murder. However, she does seem to have a sense of justice, murdering criminals, including a group of rapists, who she lured into a dark alley, pretending to agree to have sex with them, then brutally murdering them, and a group of delinquents who were torturing a kitten with airsoft guns, who she painted a bulls eye on their chests and executed at close range with her pistol.

Apart from her thirst for blood, the strongest emotion Kurumi feels is a obsessive lust for Shido Itsuka, though it is not clear if she is actually attracted to him or his powers.