![]() ![]() |
This article's content is marked as Mature The page contains mature content that may include coarse language, sexual references, strong drug use, extremely traumatic themes, and/or graphic violent images which may be disturbing to some. Mature pages are recommended for those who are 18 years of age and older. If you are 18 years or older or are comfortable with graphic material, you are free to view this page. Otherwise, you should close this page and view another page. |
“ | Oh, right. I would recommend not peeking inside my mind. Even with Mental Out ... I can't guarantee the Kihara in me won't harm you. | „ |
~ Yuiitsu Kihara threatening Misaki Shokuhou. |
“ | Sensei would never say this. He would insist on not involving unrelated people in his revenge. But being just like him would be too boring. I need to become something unique. So let’s try doing the opposite! Let’s choose the path Sensei never would have! Just killing the bastard who stole everything from me wouldn’t be enough. I need to steal everything I can from him, kill everything of his I can, and take away everything he holds dear! Now, that… that would be the perfect time to deliver the finishing blow!!!! | „ |
~ Yuiitsu Kihara's villainous breakdown. |
Yuiitsu Kihara is a major antagonist in the A Certain Magical Index franchise.
She is a member of the Kihara family who appeared at the end of the Baggage City incident to negotiate with the cooperative organizations that had rebelled against Academy City. Yuiitsu is also Noukan Kihara's devoted student and the person who turned Hisako Yakumi, one of the members of the Board of Directors, into a mad scientist by implanting her thought patterns into Hisako. She's the archenemy of Kakeru Kamisato due to the latter beating Noukan Kihara to near-death.
She is voiced by Mai Nakahara.
Appearance[]
Yuiitsu is a young woman with shoulder-length black hair and matching eyes. She wears a white labcoat over a ready-made cheap suit, making her look like she's going to a job interview.
Personality[]
Like most of her family, Yuiitsu Kihara is a very intelligent, sinister and sociopathic individual who does the most twisted actions in the name of science. She has no qualms with using people for her experiments or for her own amusement, as seen when she forcibly implanted a fraction of her own intellectual curiosity into Hisako Yakumi and indirectly caused the events of the Agitate Halation project. She also displays an utterly callous disregard for others and is willing to cause widespread chaos for the sake of her own inhumane curiosity, as shown when she released an unstable Teitoku Kakine into Academy City to following his revival, not caring that he would cause untold destruction, because she was simply interested in what would happen and wanted to observe what Kakine would do.
Despite this, Yuiitsu also has a softer side to her, displayed by her great admiration for Noukan Kihara. She has shown to genuinely care about Noukan and treats him more as her teacher rather than a pet dog, even mimicking some of his traits, such as his tendency for romance, and describing things between like and dislike, and good and bad. She was even driven to tears after seeing Noukan mortally injured and placing him into cold sleep. Eventually, Yuiitsu becomes extremely vengeful and vindictive, seeking revenge against everyone and everything that brought him to that state. She also desires to surpass Noukan and become a "unique" Kihara.
Moreover, it also seems that she shares a similar relationship with Gensei Kihara, whom she affectionately refers to as her “grandpa”, as displayed by her noticeable grudge against Misaki Shokuhou after defeating him during Daihasei Festival Arc. Yuiitsu tends to lose her motivation in things whenever she fails to find something of interest in it, and usually overlooks things that can be seen if properly analyzed.
Yuiitsu can be rather immature at times, as shown by her encounter with the Tokiwadai Dorm Supervisor, throwing out childish insults and displaying a haughty exterior. She can also become increasingly flustered when it comes to matters of love, as shown when the Dorm Supervisor pointed out her lack of romantic experience.
Biography[]
Nothing much is known about Yuiitsu's background prior to her introduction in the series.
Powers and Abilities[]
Powers[]

Yuiitsu using Sample Shoggoth to place World Rejecter on her right hand.
- Sample Shoggoth: Sample Shoggoth is an artificial parasitic life-form that appears as a pitch black amorphous mass resembling an octopus floating in the deep sea, a soft piece of fat cut away with a knife or loose rubber film melted from the inside. It is actually a variety of Academy City’s #2 ability, Dark Matter, but it ignores that esper’s will and can be controlled by a third party. Yuiitsu obtained a sample of it and implanted it on herself. Unlike its previous host Patricia Birdway, Yuiitsu has full control of the Sample Shoggoth, being able to willingly project it from her body in numerous shapes like spears, thin threads that can easily slice off a human hand, a large stream sprayed towards the enemy, "legs" to cling and crawl on walls, a whip-like black torrent and even a paraglider/pair of wings to sour through the sky. She can also use it to quickly perform surgery, being capable of attaching Kakeru's right hand to her right arm with a special sewing technique that connects all the nerves and blood vessels to allow her immediate use of the hand. She can also repair the damage inflicted on her body. She also stated that she could use Sample Shoggoth to kill someone by slowly melting away their fat from the outside.
Yuiitsu and her fake Magic Gods.
- Niang-Niang: The fake Niang-Niang can transform each of her ten fingers into Pao-Pei, weapons (swords, spears, axes, staffs, etc...) that can freely extend and retract up to at least several meters .
- Proserpina: The fake Persephone can shoot masses of darkness the size of baseballs at high speeds like a machine gun. The projectiles bend the light around them, and are likely based on the pomegranate seeds from Proserpina's legend. The effects of the projectile are unknown, but Salome speculated that the fruit forcibly brings one to the underworld/to death, with no escape possible once they get inside you. However, this is doubtful since it's a mere imitation that pales in power to the real magic Proserpina would have as a magic god, similar as to how Niang-Niang's Pao-Pei are much weaker than the original's.

Yuiitsu using World Rejecter for the first time.
- World Rejecter: Yuiitsu stole Kakeru Kamisato's right hand, gaining access to World Rejecter, a mysterious power that resides on his right hand that can be used to banish/exile targets (From living beings to powers and inanimate objects) to unused portions of the world, as long as some conditions are fulfilled. The biggest condition seems to be that the target has to hold conflicting desires, or in the case of powers and inanimate objects, the source/creator has to have conflicting desires. While it works on contact like Imagine Breaker, it also has a ranged function, being able to banish anything that is touched by the right hand's shadow. There's a slight time lag between uses, and it seems to be activated by saying the phrase: "Do you wish for a new world?", though Kakeru has been able to use it without that trigger by simply moving his right hand.
Abilities[]
- Gifted Intellect: Like all Kiharas, Yuiitsu possesses considerable scientific knowledge and intellect. Her researcher's mind is capable of taking into account conditions, tools and possible methods, and calculating the values and steps in order to reach a goal, even when Yuiitsu herself is under immense distress. She is capable of making careful plans for hypothetical scenarios, as required in the position of Academy City's Hypothetical Disaster Planning Calculations Director. She also has some degree of forensic and investigative capabilities.
- Expert Tactician: Even while under heavy mental stress, Yuitsu was capable of accurately analyzing the injured Noukan Kihara, calculating all the problem points and compare them to her available options to try and find a way to heal him. She also copied one of Amata's martial arts techniques, developed a way to tame Sample Shoggoth and attenuated the St. Germain virus, thus gaining access to magic, all for a plan that allowed her to successfully steal Kakeru Kamisato's right hand and World Rejecter.
- Master Martial Artist: Yuiitsu is a highly skilled martial artist, being capable of fighting Salome and Touma Kamijou in close quarters. She was also capable of reading the path of Salome's giant invisible blade from the motion of the particles in the air. She imitated one of Amata Kihara's techniques, which uses the shockwaves propagating from the multiple points of contact of Yuiitsu's strikes. These shockwaves will collide within the opponent's body and create deadly bubbles inside their blood vessels, which will cause normal human beings to quickly fall over dead. Yuiitsu can also use her lab coat to slightly divert the path of a slash or a similar attack to avoid a lethal blow, similar to how shields are used to divert a blade instead of blocking it, though this slowly accumulates damage on the lab coat until it can no longer be used as a shield of cloth.
Equipment[]
- Modified stun gun-like device: A small card-sized device resembling a stun gun that uses amplification circuits to send out a high power pulse to destroy electronic circuits and unlock doors without producing any noise or light. Yuiitsu has further modified it to destroy the electric signals stored in cerebral nerves and render them unreadable, thus erasing the short-term memories of anyone within ten meters and immediately knocking them out, though this use does produce bluish-white sparks.
- UL Exploder: Likely standing for "UNDER_LINE Exploder", it is an oddly-shaped gun resembling a starting pistol for a race, which gathers and detonates the UNDER_LINE nanodevices in a false dust explosion and for a very short time creates a space which can't be monitored by the network. As such, the UL Exploder only works inside Academy City. The device was also used by Yuuitsu to boost herself by shooting behind her.
- Mental Out FIVE_Over OS Technology: Yuiitsu obtained a sample of the the FIVE_Over OS real-time military camouflage technology and magnetically controlled monitor, which she used to take the place of one of the students in the school Kamisato Kakeru was attending to, achieving an almost perfect disguise that managed to initially fool even a close acquaintance of the girl she was impersonating. She can also use it for camouflage by blending with the landscape or her surroundings.
- Attenuated St. Germain Virus: Yuiitsu obtained a sample of the St. Germain virus. She successfully cultivated the black pill-shaped sample in a Petri dish and attenuated it, allowing her to use it for her own purposes in a safe manner. She used the virus to rearrange and overwrite her own brain to trick World Rejecter's recognition and avoid the power rejecting her. She also can apparently insert the virus into other people to infect their brain from within and kill them by making them take the bright red pill her attenuated virus uses.

Yuiitsu's Anti-Art Attachment
- Anti-Art Attachment: During her battle with Touma Kamijou, Kakeru Kamisato and the Kamisato Faction, Yuiitsu created her own custom Anti-Art Attachment by sacrificing the remaining Elements to use as material for it, though this A.A.A. takes a different route than the one used by Noukan as it was built without support from Aleister Crowley and thus likely lacks the same mysterious powers. Unlike the regular A.A.A., this version has a biological look, with large portions being translucent. It has sharp crystalline protrusions extending from the back, resembling a pair of giant wings, with other protrusions resembling eyeballs, claws and fangs. This A.A.A. has a wide variety of cannons, laser beams, missile containers, Gatling guns, and a large anti-special steel chainsaw blade. It also inherits the same camouflage ability used by Elements, allowing Yuiitsu and the A.A.A. to blend into the background and disappear, almost becoming invisible.