Kurumi

Kurumi was 17 years old when she first met the Ally of Justice, Mio Takamiya, who saved her life. That is, at 17, Kurumi became a spirit.
Throughout her life, Kurumi killed over 10,000 people with her own hands, not counting the victims of her spatial rifts.
Kurumi also ended the lives of over 50 different spirits, including her best friend Sawa Yamauchi.

Kurumi is a spirit who was killed several times in the past by Mana Takamiya. However, those killed by Mana were merely clones created by the Angel of the real Kurumi.
The real Kurumi considers Mana an unworthy opponent, wasting her time and being outmatched in many ways. However, during the battle, she proved herself to be a superior opponent.
Kurumi has at least several safehouses in Tengu City. She likely has safehouses in other cities as well.
In Volume 16, she invited Shido to one of her hideouts, located in an old apartment building on the outskirts of town. Although the building appears abandoned and is covered in graffiti, it has electricity. Kurumi's room is on the third floor, and the room itself is well-kept, unlike the hallways of the building. The room itself is quite ordinary, with nothing but a curtain on the window and a very basic bed.
In Date A Live: Rinne Utopia, Kurumi didn't give a clear answer when Shido asked her if she lived at the shrine.
Kurumi's house is a 10-minute walk from the Itsuka family residence.
It's an old-fashioned, isolated house, surrounded by a high fence. On the side of the door is a metal sign with the words "Tokisaki," covered in scratches and rust.
Ratatoskr wanted Kurumi to live in a room in the Spirit Mansion or at least in a residence under their supervision, but Kurumi refused.

The Castle That Devours Time
Her Angel is extremely powerful. Every time she uses her powers, she sacrifices her own lifespan. To regain her own time, she has the ability to absorb other people's "time."

"Time-Eating Castle" (時喰みの城 Toki Hami no Shiro) is a powerful shadow barrier, dark red in color. Those caught within the barrier immediately begin to lose life force (time). Kurumi can control the amount of time absorbed from people, and thus use this ability to kill or weaken opponents. This ability can also directly replenish not only her time but also her spiritual energy. After hearing Origami's request to send her back in time, Kurumi used a special version of her shadow to quickly absorb her reiryoku for later use. Furthermore, clones have also shown the ability to significantly expand the range of her shadow and the number of victims.

However, Shido has been shown to be able to passively resist the debilitating effects of the "Castle of Devouring Time" through the reiryoku of the spirits he sealed. Spirits and wizards, as well as humans empowered by Miku's "March," are also able to resist this ability.

In addition, Kurumi has the ability to cause and stop the creation of a spatial quake, which is shown in one of the episodes during a meeting with Shido on the roof.

Only the real Kurumi is capable of using all of her spiritual powers to their full potential, while clones can use her weapons, summon "Time Devouring Castle" and even dimensional distortions.

Tenth Bullet: Yud (一〇の弾ユッド Ichi Rei no Dan) - the ability to view the past (memories) of any object or creature.
Eleventh Bullet: Yud Aleph (Ichi Ichi no Dan) — the ability to send an object into the future. The limit of this time travel is unknown. According to Kurumi, Yud Aleph can send a target into the future even to a time period where spirits no longer exist.
Twelfth Bullet: Yud Bet (一二の弾ユッド・ベート Ichi Ni no Dan) is the ability to time travel or send objects into the past. A side effect of altering past history can lead to the creation of alternate timelines. The limit of this time travel is also unknown: at the very least, it's decades, and potentially extends to any point in time, provided Nightmare has enough magical energy to do so.

The Sixth Bullet: Vav (Roku no Dan) is the ability to send the target's consciousness into the body of a past version of themselves. However, unlike the Twelfth Bullet, the user can only travel back a maximum of a few days, regardless of how much time is used. Due to the outcome of her battle against Kotori in Volume 4, this bullet remained unusable for Kurumi until the events of Volume 16.
Seventh Bullet: Zain (七の弾ザイン Nana no Dan) - the ability to locally stop the time of a specific target (also stops/cancels various effects that exist on objects, thereby allowing one to ignore their defensive abilities and artifacts; however, most likely, the durability of the body itself is not ignored).
Eighth Bullet: Het (Hachi no Dan) is the ability to create clones that are copies of Kurumi at a specific point in time and possess the exact same arsenal of abilities as her. Nightmare is able to regulate their strength at will (the stronger the clone, the more of her "lifetime" it will require to create) and can even create armies of thousands of these duplicates, equipped with ritual weapons. However, such duplicates are unable to use the real Kurumi's Angel magic.
Ninth Bullet: Tet (九の弾テット Kyu no Dan) is the ability to tap into the thoughts and consciousness of others, thereby communicating telepathically with them, even if they are in different timelines and dimensions. Naturally, Kurumi sees and is aware of everything that the being with whom she is mentally contacting perceives.

First Bullet: Aleph (一の弾アレフ Ichi no Dan) - the ability to significantly increase the speed of any object or creature.
Second Bullet: Bet (二の弾ベート Ni no Dan) - The ability to significantly reduce the speed of any object or creature.
Third Bullet: Gimel (三の弾ギメル San no Dan) - the ability to age (increase internal speed) any object or creature.
Fourth Bullet: Dalet (四の弾ダレット Yon no Dan) - the ability to roll back events that happened to an object by returning it to a specific point in time.
Fifth Bullet: Hei (五の弾ヘイ Go no Dan) - the ability to glimpse the future

Time manipulation
Using a combination of time, shadows, and spiritual energy (reiryoku) as fuel, Kurumi can manipulate time using Zafkiel's bullets. Her flintlock pistol and musket each have special bullets that can have different effects on the time of an object (target) depending on the specific bullet.

To activate the desired ability, she must first call upon her Angel (regardless of whether the Angel has been summoned or not) and hold a flintlock under the Angel's desired number, from where the power flows into the weapon. She then fires the charged weapon at her target; if Kurumi intends to use the ability's effect on herself, she fires at herself. The bullet's effect takes effect the moment it hits the target.

The downside of these bullets is that they cost Kurumi her personal time, or in other words, her life force. This is visually represented by the clock in her left eye, moving clockwise. The amount of time required for the bullets also varies, with some abilities requiring more life force than others. In the case of the last two bullets, they can even cost her all of her remaining time.

Kurumi lives up to her reputation as the "Worst Spirit." Kurumi Tokisaki is a fierce fighter with a unique set of abilities that make her a formidable opponent for many. Her large number of clones ensures that in a battle of numbers, she is virtually unmatched. She was reportedly the Spirit who inflicted the most damage during the assault on DEM's Japanese headquarters. Kurumi is the only Spirit to possess two Sephira Crystals, allowing her to wield two different Angels.

At some point, using her ability to create clones of herself, Kurumi created a massive information network to gain enough time to use the Twelfth Bullet. She and her clones began hunting people, draining their time. However, the many lives she took attracted the attention of DEM, who sent Mana Takamiya to assassinate her. They fought numerous battles, with Mana always killing Kurumi. However, Mana was unaware that she was simply killing clones. A short time later, "Phantom" appeared before Kurumi and told her about Shido Itsuka and the powers of other Spirits sealed within his body. It is unknown how Kurumi entered Raizen High School to discover whether "Phantom"'s words were true.

Mio revealed the truth: she was the First Spirit and gave Sephira Crystals to people: she transformed people into monsters, then killed them to purify the crystals (the human body served as a filter). Mio claimed she intended to give the crystals only to a select few among humanity, but hesitated when questioned about her motives. Mio then thanked Kurumi for her help before she lost consciousness. Some time later, Kurumi woke up in a giant crater after causing a spatial rift. She remembered nothing else, only how to use her Angel. The AST team prepared to attack, but Kurumi escaped. Afterward, Tokisaki decided to regain her memories and used the tenth bullet on herself, although she should have used the twelfth bullet to travel back in time and kill Mio, thereby preventing the existence of all known rift-causing Spirits.

Kurumi was once an ordinary person who lived in a wealthy family with loving parents. However, one day, while returning home, she was attacked by a monster. Kurumi was saved by a girl in a strange light dress who introduced herself as Mio Takamiya and claimed to be an "Ally of Justice". She called the monster a spirit and asked Kurumi if she wanted the power to help fight monsters. Wanting to gain power and protect her family and friends, Kurumi agreed and touched the Sephira Crystal that contained the Angel Zafkiel. When she unknowingly touched it, she gained the powers of a spirit.

Working with Mio, Kurumi began hunting spirits and killed about fifty. After the spirit was killed, Mio began to cleanse the body. Kurumi suggested that she go visit her friend Sawa Yamauchi, hoping that her adorable cat would endear her to the girl. But to Kurumi's horror, she saw not a monster on the ground, but her friend, as Mio held a red Sephira Crystal in her hands. Realizing that Sawa was a spirit, Kurumi began to inverse, but used the fourth bullet in time to rewind time and prevent the inversion.

Before becoming a Spirit, Kurumi had a strong sense of justice. Observing the inequality in the world, she always felt a desire to help those in need. Mio considered this trait both beautiful and naive, which she exploited by tricking her into becoming a Spirit who hunted other Spirits who were incompatible with Sephira Crystals.

Her ability to summon shadow clones from different timelines further complicates her character. The clones are essentially Kurumi herself, but from different timelines. They share the same personality, but they possess such free will that they can share goals and obsessive fears. Some of her clones also slightly reflect her former personality: the clone Shido encountered on the school rooftop in Volume 4 almost agreed to let Shido save her, and the clone from the "Kurumi Star Festival" story (the same clone) was very joyful and became emotional.

Itsuki Shido's kindness played into her hands. The main sign of this kindness was shown at the end of Volume 6 of the light novel, when she offered to save Tohka. She enjoys teasing Shido; apparently, she harbors some feelings for him, which is why she hasn't yet absorbed him, even when she had the opportunity and could easily have achieved her goal.

Despite not killing without reason and showing signs of redemption, Kurumi doesn't seem to consider herself a good person and even hates being called one. When Shido declared that he wouldn't abandon her despite her being a murderer, Kurumi responded by using her "Castle of Devouring Time" on the students of Raizen High School. She even created a spacequake that could have killed them all to force Shido to abandon her. Furthermore, when <Phantom> called her kind, Kurumi attempted to shoot her.

However, her brutal murders are justified by justice, as she brutally killed potential rapists and animal abusers. Furthermore, her sense of justice is justified by her desire to return to the past and kill the First Spirit, prevent spatial rifts from ever occurring on Earth, and save millions of innocent lives. Because of this goal, "Phantom" called Kurumi kind, albeit sarcastically.

However, despite her sadistic tendencies, Kurumi's mental state hasn't completely deteriorated. This can be seen in the case of small animals and other creatures. She once killed four boys not because she needed to prolong her life, but because they were abusing a kitten and trying to kill it. She even harbored a desire to live a normal life, to have a chance at redemption, as Shido offered this to one of her clones and almost convinced him until the real Kurumi appeared. The influence on the clone also affects Kurumi herself. While helping Shido find Tohka (so Kurumi could find the Second Spirit), Tokisaki spoke to the clones, and they were happy because Shido stroked Kurumi's head.

Kurumi is a very complex character. She harbors a dislike for humanity that borders on distrust; she holds a similar attitude toward spirits. She is also a natural actress. When the time comes, she can play the role of a polite, innocent, curious, and weak girl, which served her well when she enrolled in Raizen High School to achieve her goal. However, beneath this mask lies a sadist prone to fits and hysterical, insane laughter. She sees people only as food, consuming them, stealing their time and extending her own life. Consequently, they are like cheap, disposable commodities to her.

Her Astral Dress is a red and black Gothic Lolita dress with frills. She wears a bow to hold her hair back. She also has a red and black collar around her neck. Kurumi is 157 centimeters tall, and her body measurements are B85/W59/H87.

"A girl of astonishing beauty," is how Shido described her. She appears elegant and well-mannered. She has brunette hair with long, unevenly braided pigtails. The right iris of her eye is red, while the left is gold, with the face of an antique clock. The time of the clock reflects her life, but she covers the clock-like eye with her bangs. However, when Kurumi transforms into a Spirit, the eye becomes visible.

Kurumi used unspecified and unexplained methods to personally transfer into Shido's high school and class so she could get closer to him. Her goals and reasons for transferring were simple: to absorb Shido and, in doing so, obtain the Spirits' power he had sealed within his body. She somehow learned about Shido, his ability, and his knowledge of the existence of Spirits. While Kurumi was a student at Raizen High School, she nearly succeeded in absorbing Shido, but was forced to retreat after Kotori's arrival, simply because she was unprepared for the encounter. She later claimed she could defeat Kotori if given more time.

It was later revealed (at the end of Volume 4) that Kurumi had received information about Shido from a mysterious being, and it seemed as if she was speaking to herself. She stated that her true goal was to use the Twelfth Bullet to return to the past and kill the First Spirit, thereby erasing the very existence of Spirits and all Spirits that had appeared in this world. But to do this, she required a massive amount of spiritual energy, which she lacked, which is why she wanted to absorb Shido after he sealed the powers of the other three Spirits into his body. However, even this would not have been enough to kill the First Spirit.

that Kurumi Tokisaki is the most dangerous spirit known, having personally killed over 10,000 people (not counting the victims of her spatial rifts).

Nightmare (code name)
The worst spirit
Curumin

Red (right eye)
Yellow clock-shaped (left eye)

Black

Human
Spirit (formerly)

157 cm

June 10

17 (physical)
18 (physical, 21 volumes)
Over 37 (actual age)