Kihara Seisuu

* Novel
* Novel (Mutated)

## Abilities

### Ability

**Encounter** (不慮の事故（エンカウンター）, *Furyo no Jiko (Enkauntā)*?, lit. "Unexpected Accident")

## Debuts

### Novel

NT Volume 13

**Kihara Seisuu** (木原 整数, *Kihara Seisū*?) is a character introduced in *Shinyaku Toaru Majutsu no Index* as a member of the infamous Kihara Family. He is the leader of CERBERUS.

## Etymology

As part of an apparent trend to the Kihara family having names related to science or mathematics, Kihara Seisuu's given name (整数) can be translated as "Integer" or "Whole number".

## Appearance

Seisuu appears a young man with short, dark hair and brown eyes. He commonly wears a dark blue, long sleeved blazer, white buttoned shirt, purple hoodie and t-shirt, gray pants, and black leather shoes. When using his realizer, Seisuu's aura grows, becoming black and sending shock waves in all directions before settling around his body as a black robe. His hair grows long and white, his irises become gold and a red fishnet pattern spreads from the back of his palms through his arms.

## Personality

Initially, Kihara Seisuu is an affable and optimistic individual. However, his good-hearted nature is merely just a façade for his destructive and nihilistic personality. In truth, he is an extremely devious, heartless, calculative, ruthless, morbid, sadistic and remorseless psychopath whose formidable intellect is outshone by his sheer cruelty and unrelenting ambition. He manages a bright and cheerful persona when out in the open, carefully hiding his insidious and manipulative nature. Seisuu is among the more audacious villains, having acquired his minions by rescuing them from the antagonism of some of his most dangerous possible opponents. He varies in his involvement with other parties, only interfering in the schemes of others if his own are threatened.

Given that he is a genius, Seisuu always stays one step ahead. Therefore, he is uneasy with the existence of unknown factors, such as Kamijou Touma, that could endanger his future plans. Noted for being very selfish and filled with ego and greed, Seisuu is as well incredibly narcissistic and egocentric, having a tendency to plaster his persona all over his creations and bases to fuel his ego. Moreover, its very clear that Seisuu lacks any form of moral compass; he shows little regard for other's lives, seeing them as toys for his amusement.

For his desire to come into fruition, Seisuu had established his position as a high ranking researcher in Academy City and crafted himself the reputation of a wise superior to others. Gaining the recognition, respect, trust, and admiration by performing grand feats, he instills the image of a powerful and fearless leader that others would look up and depend on. Everything that he has done, ranging from planting parasites into the minds of friends, manipulating unsuspecting people, and causing the death of innocents, is all for the sake of his goals. Nothing he does are for the benefit of others, showing the absence of his sense of humanity, justice, and empathy. He holds no feelings for his followers, nor does he feel anything toward their deaths.

## Background

Much of Seisuu's background is unknown, but at some point in time he established CERBERUS and created the Realizer. He was once involved in research concerning the Imaginary Number District.

## Chronology

### Toaru Majutsu no Index

#### Battle Royale Arc

*Main article: Battle Royale Arc*
Seisuu was briefly mentioned by the Professor during his meeting with Kakine Teitoku, referring to him as one who is superior to him in terms of intellect and ambition.

## Abilities

### Encounter

Seisuu's unique ability is **Encounter** (不慮の事故（エンカウンター）, *Furyo no Jiko (Enkauntā)*?, lit. "Unexpected Accident"), which allows him to push away all damage inflicted on him, including all physical, emotional, and mental damage, elsewhere. No matter how fast or numerous the attacks, Seisuu will take no damage from any assault. The location is specified by him and can range from structures to other people. Seisuu claims that his ability cannot be rationalized as even if there is no opening, Encounter will still be able to push any damage away from him. However, Encounter is still a supernatural ability and as such, can be negated by the Imagine Breaker.

### Other abilities

**Supergenius-Level Intellect:** Despite what his appearance might suggest, Kihara Seisuu is a supergenius of phenomenally outstanding, wunderkind level intelligence and has devoted himself to the study of supernatural powers and robotics. Having inherited his genius from a family of brilliant scientists and researchers, Seisuu is an incredibly talented scientist and inventor who possesses overwhelming scientific knowledge and seemingly limitless mastery over technology. His remarkable skills as an engineer and programmer are best evidenced by the armies of robots, machines and mechs he has created for his numerous schemes. In addition to this, he is also well versed in chemistry, physics, engineering, geology, biology and mathematics. If knowledge can be interpreted as a parallel of power, Seisuu's tremendous intellect alone makes him a very powerful individual.

* **Master Tactician**: In addition to harboring an immense amount of scientific knowledge, Kihara Seisuu is shown to be a phenomenally brilliant, supergenius tactician, to the point that he claims not to know how to lose. He mainly uses his cunning and planning to successfully outwit stronger and more powerful foes, rather than simply out-fighting them, often using any of their exploitable weaknesses to his advantage, having multiple contingency plans always in store. Moreover, he also has proven to be extraordinarily skillful in the art of deception and manipulation, capable of rivaling Aleister Crowley or Laura Stuart, as he was notably able to hide his internal cruelty and malevolence under a kindly and altruistic facade.

### Equipment

* **Realizers**: Seisuu's most notable invention is the Realizer and as such, has unlimited access to them. He can use a variety of different realizers, each one having a unique ability. While most of them have not been shown, Seisuu can use the most basic realizer which allows him to generate a field that enabled him to control the laws of physics within its limits. He can use the field on himself, project it over a large area of unspecified dimensions, or concentrate it onto a smaller area or object, such as another person. With this, he can change the direction of gravity, selectively alter angular momentum, and even slow down time.
	+ **Susanoo Unit**: A powered suit equipped with a Realizer.
* **Master Box**: A multi-purpose tool that allows him to, power-up, hack into, repair, open, destroy/disable various things.
* **Warp Topaz**: A gemstone that allows Seisuu to warp reality using space-based phenomena, meaning shaping the existential state around himself by manipulating the surrounding space to enact any desired effect. Any physics in a space can be distorted, placements can be changed, warp-like effects can be possible to induce teleportation and dimensional consequences.
* **Mimosa**: Seisuu is able to control Mimosa through the master box. Normally, they are placed on micro-organisms in the air and then spread around. It can distinguish between animal and plant cells one by one. When gathered and used, it lets out a sharp metallic noise. It then tears off the cells of the target one at a time, leaving only the target's clothes and bones behind.
* **Claw of Horus** (ホルスの爪, *Horusu no Tsume*?): A weapon that draws power from the magnetic core of the Earth itself. According to Seisuu, with the claw of horus, he is essentially punching someone with the same force as the planet. This was used to incapacitate Accelerator.
* **Curse Remover** (呪除去装置, *Noroi Jokyo Sōchi*?): A device which can remove magical properties from a wide variety of different things. Since it can remove certain effects while leaving others intact, Seisuu used this device to turn cursed objects into completely beneficial ones (i.e. turning a pair of boxing gloves which would cause the wearer to be stuck reliving a single fight for all eternity into a pair of time traveling mittens).
* **Antimatter Gun** (反物質銃, *Hanbusshitsu-jū*?): A pistol that shoots antimatter. It is even capable of transmuting matter or material beings into antimatter or anti-material beings that cause immediate destruction to any matter that comes into contact with them.
* **Enemy Blaster**: A powered suit armed with a heavy machine gun on its left arm and a smoothbore gun on its right arm.
* **Psychic Paper**: A blank piece of paper that he shows to others to show them whatever he wants them to believe who he is. This can also be used on machinery too.
* **Shrink Ray**: A gun that can reduce the size of anything and everything down to the dimensions of an ant, cell or even smaller.
* **Bandersnatch** (バンダースナッチ, *Bandāsunatchi*?): A humanoid doll or robot equipped with a Realizer that must be linked to a larger Realizer unit for it to function.