Kihara Gensei

Kihara Gensei (木原幻生) is an enigmatic character appearing in Toaru Kagaku no Railgun. A member of the Kihara family, he is a man obssessed with Level 6. And he has made several attempts to acheive it.

As the creator of the Ability Body Crystal, his actions would influence the beginning of Toaru Kagaku no Railgun, and several characters in the later part of Toaru Majutsu no Index. For those reasons, he can be arguably considered the main antagonist of the Railgun side story.

Etymology
His name (幻生) literally means "Illusory Life", and maybe a reference not appearing at all in the series in the current year of the timeline. Using other characters (原生), it can be translated as "Primitive" or "Primeval", referring to his age. Furthermore, his name is used interchagably with "Tensei", meaning Reincarnation.

Appearance
He is a man of advanced age. He is height is quite average, though he seems to have a hunch. His most notable feature is that he is often with his eyes closed, only rarely opening it when he is excited, as well as a birthmark that can be found on his right temple. Gensei is currently the oldest Kihara introduced in the series.

Personality
Typical of a Kihara, Gensei is a sinister figure despite his usually smiling expression; he has no qualms in killing people for the success of his research, which brings him at odds with Heaven Canceller, whose belief in the Hippocratic Oath clashes with Gensei eagerness to push the boundaries of science.

Perhaps because of this, and the fact that he fits the description the most that he is referred to as a "mad scientist".

Background
According to Therestina, Gensei is a famous and influential scientist who famous in different circles. His expertise is in the line of neuroscience, where he conducts experiments to improve the potential of the human mind, though in more sinister ways than most scientists.

His biggest research project yet is SYSTEM, which aims to explore the possibilities of humans to "reach the will of heaven" by creating a Level 6 Esper. His methods are through "overloading espers" by destabilizing the brain and breaking its tolerable limits by the use of manipulation of the brain and subjecting it to extreme treatments involving overuse of chemicals. This experiment was first done on his granddaugher, Therestina Kihara, as the First Sample, and have overloaded her abilities to extract the chemicals from her.

He later presents his findings to his peers, and piques the attention of the Heaven Canceller, who tells him of the human costs of his experiments and the victims it causes, though Gensei states that there are no victims in his experiments.

His experiments have apparently attracted some people, and formed a council to fund his work, with him as the supervisor. In the Advanced Education Department, he supervises the experiment, and has Kiyama Harumi, teach the Child Errors that will be used in the experiment. Predictably, the experiments goes awry for the children, though Gensei shows calmness throughout the ordeal even the children are in danger, and thanks Harumi for all her hardwork. He later puts a gag order on the facility, and tells the researcher present that the experiment was completed without incident. In the manga, it is shown that Gensei is later confronted by Harumi for this, though Gensei just tells her that nobody cares as they are getting rid of the problematic Child Errors.

It is unknown what he has done afterwards. At some point in time he had a research facility built in School District 17, although, what it was use for was unknown. Alhough presumably, he used to carry on his research on the Crystallized Esper Essence.

He apparently later changes tactics in creating a Level 6, apparently abandoning the Ability Body Crystal and focusing his attention on leveling a Level 5. He is the primary proponent of the Level 6 Shift for Accelerator. And later, after its failure, had his attention focus on the Misaka Network and Misaka Mikoto. He also somehow learns of the Exterior Project, and desires to use it as part of his plans.

Level Upper Arc
He is apparently the one who gave instructions to Harumi for brainwave tuning, allowing her to create Level Upper, effectively being the man behind the creation of the Level Upper. Although it is unknown if it is through his deliberate instruction or covert manipulation as part of his plans. When Misaka Mikoto gets a glimpse of Kiyama Harumi's memory after electrocuting her, he is first seen asking Harumi to become a teacher to the Child Errors as it was a request by the head council. He is later seen smiling with glee after the experiment, overloading the Child Error espers present and putting them in a coma, apparently getting the result he wanted.

Poltergeist Arc
Kihara Gensei is referenced several times during the arc, after a string of Poltergeist earthquakes erupts all around Academy City, due to him being linked to Kiyama Harumi, who in their experiments have overloaded espers (overloaded espers causes the Poltergeist phenomenon). Further revelations shows Heaven Canceller's dealings with Gensei, which gives him a reason to intervene in the recent incidents.

In the final episode, it is revealed that he used his granddaughter, Therestina Kihara Lifeline, as the first sample of his Crystallized Esper Essence, telling her she will be Academy City's dream, in becoming Level 6.

Daihasei Festival Arc
Gensei becomes prominent during the arc, and is its main antagonist. Prior to the events of the arc, he releases Kouzaku Mitori to work for him, and by proxy allow him to use MEMBER as she is a mediator for the group. Moreover, not exactly knowing where Exterior, it is implied that he used or even instigated the Urban Legend website Auribus oculi fideliores sunt to look for its location

He has Mitori manipulate MEMBER to find one of the Sisters so that he maybe able to access the Misaka Network after he takes over Exterior, as well as restrain Misaka Mikoto for him.

Wanting to lure away Misaki from Exterior, he has a stand-in to look like him for the International Esper Powers Research Conference in School District 9, and most likely leaked information of "his" whereabouts there. Knowing that Misaki will eventually figure out his ruse, he sends a message to Misaki by talking to stand-in in the event that Misaki reads the stand-in's memories. Here, he mocks Misaki for leaving Exterior.

As Misaki and Mikoto take down the conference, Mitori reports to Gensei himself, and shows the great foresight he had in Misaki being the one who raided their "villas" in order to find him in the conference. Gensei then tells her to prepare as he goes towards School District 2 where the Exterior is located.

Upon arriving there, he swiftly forces Kites Knockraven, the security supervisor of the Level 6 Shift, and now under the employ of Misaki up on the roof in desperation with Misaka 10032 with his group of skilled special forces. He quickly takes over Exterior, going through its complex registration protocols for usage by aligning its brainwaves with his. He quickly stuns Kites with the power of Mental Out, and later taunts Misaki on the phone regarding one he easily took over, asking her if she heard that rumors, the Level Upper. He is entralled by Mikoto's arrival in the building, saying that it saved him the effort. With Misaki collapsing after Gensei took over her giant brain (Exterior), Gensei looks upon the still ailing Misaka 10032, and destroys the security that Misaki set-up for the Misaka Network using her powers by using her powers via Exterior. With that it shatters the security against electrical viruses, and all of the Sisters in the world are quickly infected by it.

Black electricity covers the sky as the power caused by the virus infecting the Misaka Network manifests itself through each Sister. Gensei is estatic of the results, but notes on how the energy is nothing more than show if it doesn't have any use. Mikoto finally arrives at the rooftop, and seeing a downed Misaka 10032, demands to know what Gensei done to her. However, Gensei can only smile at her arrival, referring to her as Aleister's favorite. Suddenly, the black lightning gathering outside gathers and jumps into Mikoto. Lightning flashes on the roof as Misaka Mikoto form changes. Kihara Gensei smiles and says that the experiments will now begin, asking if Mikoto can become a Level 6.

Quotes

 * (To Kiyama Harumi from Toaru Kagaku no Railgun Episode 11) "It's a pity we lost them, but they were sacrifices in the name of science."
 * (To his scientific community from Toaru Kagaku no Railgun Episode 22) "What is the reason Academy City exists? That's right—to surpass mankind."
 * (To the Heaven Canceller from Toaru Kagaku no Railgun Episode 22) "Victims? My experiments have no victims. That's preposterous."
 * (To Therestina from Toaru Kagaku no Railgun Episode 24) "You're going to become Academy City's dream... Yes... The foundation of it, that is!"