Kumokawa Seria

Kumokawa Seria (雲川 芹亜) is a side character in the Toaru Majutsu no Index series. She is a third-year student attending A Certain High School and is described as a genius. She's currently employed by Kaizumi Tsugutoshi, one of the twelve members of Academy City's Board of Directors, as his advisor.

Appearance
She is called a “beauty senpai” by her kouhai students as a tribute to her attractive looks, which feature shoulder-length black hair, fringe tied back, and a fine body with an exceedingly ample bosom.

She commonly wears a school-issued sailor uniform with its standard skirt changed for a “defensive” long one. Her navel is readily observable in the gap between her blouse and skirt. She is smart and athletic, and looks so accordingly.

She supposedly needn't worry about money, only needing red tea to go along with cake. Although an adolescent, she could taste the difference between brandy's; she even wouldn't look out of place should she drive around in a sports car. Of course, the latter descriptions were just an impression others would get when they look at all.

Personality
She is considered to be a very manipulative and calculating person who thinks of the big picture many times. Often than not, people whom she works with feel she is a force to be reckoned with. At other times she can be seen as aloof or arrogant in her manners (something which got Fukiyose Seiri very angry). She seems to enjoy teasing people at times, once saying that Seiri copied her looks.

While she can be ruthless, she is a good person and tries her best to stop the tragedies she knows about and regets when she couldn't stop.

She's very knowledgeable in things happening on the Science side, knowing about Deep Blood, Imagine Breaker, and the Level 6 Shift project. Personally she's very interested in Touma and his ability Imagine Breaker. She likewise respects Touma for all the tragedies he managed to stop, while being depressed that she couldn't do anything despite knowing about them and having a position of power.

Background
It is unknown when and how Seria became a "brain" for a director but in a conversation with Director Tsugutoshi, she apparently chose to be an upperclassmen with a school life meaning she had a different form of occupation. In Tsuchimikado Motoharu's conversation with Yakumi Hisako, he states that Tsugutoshi has "tamed" her.

Despite not showing any visible powers, it is most likely she had gone through the Power Curriculum Program due to the fact that she goes to A Certain High School. Its been implied by Tsugutoshi that she may have been quite close to Touma before his memory loss.

DRAGON Arc
She's also mentioned in passing when GROUP is on the run and in needing an ally on the Board of Directors to fight against the Director after them they ruled out Kaizumi as a option, since Seria would not be fooled easily and might advise Kaizumi against helping them.

Homecoming Arc
She meets Touma again when he returns to the city but heavily intoxicated, she is one of the group of girls that follow him back to his dorm only to later leave. It is revealed that during his absence from the city she became lethargic and commented on being regretful neither she nor the director Tsugutoshi could help out Touma despite the fact they had power. After an attempt to re-energize herself, she commented she couldn't keep such appearance even for a conversation as it was hollow and she was not like Shokuhou Misaki to which Tsugutoshi replies she must if she ever wants to resume her connection with Touma implying they knew each other more than it seems at first.

Eve of the Festival
Kumokawa Seria is greeted by her sister, Maria, after she inexplicably comes out during the festival preparations. Seria comments on how it's only because people won't shut up being her turn. Maria thinks this as a veiled insult, and asks if she is talking about the beauty contests being held at various schools for the Ichihanaransai, and curses Seria if her "assets" have grown. Seria notes on how she will not be entering, and that her role is only behind the scenes, as such, she doesn't like standing out too much. Moreover, she states that Shokuhou Misaki will just manipulate the votes using her powers, rendering her entering useless.

Maria then accuses Seria of trying to say that she doesn't stand out a lot, to which Seria just says that it is just a difference in chest size. Maria says that Seria shouldn't become arrogant regarding that, and stop looking down on her. The two then argue about the values between large breasts and flat chests. However, much to Maria's consternation, Seria begins talking about Kihara Kagun, that she deems that Maria loves so much that it gives her nosebleeds, and involves his name in their little breast talk. The talk then transfer to what Maria was doing in Baggage City. Here, she asks if Maria really did fell in love with Kamijou Touma, and states that she will go "full-on soap opera mode." Maria then answers that it is a defamation of her character, and asks where she heard that rumor.

During the Festival
Seria reappears to have change her mind about the swimsuit competition in Eiri High School, though she claims that she doesn't even know how she found herself in the stage in the first place. There, she maintains a distance away from Shokuhou who comments on why she isn't coming near the stage with her, calling her an old woman, to which Seria states that it is used to get out of the range of Shoukuhou's powers.

Agitate Halation Arc
Kumokawa Seria is with Kaizumi Tsugutoshi in School District 3, during the height of Motoharu's quest for vengeance against those who have "killed" his sister, Tsuchimikado Maika. Here, it is shown that they too have been investigating the Agitate Halation Project and the killing of Maika. Seria warns of Motoharu's impending advance towards them after being contacted by him that he is coming and he is serious. Although he predicted that he would come for them, he asks Seria what to do next. Seria states that no matter what they do, Motoharu will always go after them, as such, the only way to deal with him is to confront him head on, telling Tsugutoshi to remove all the normal guards, removing his hiding places.

Seeing him as a threat to their plans to stop Yakumi Hisako's Agitate Halation Project, the both of them is determined to stop Motoharu and his cliched rampage of revenge. Seria says that they need someone to intercept him, and says that she will make preparations in which breaking in the front door is the only route available for him. She then suggests that she herself will suffice, and will use a method that Motoharu will hate the most. Although Motoharu is cautious of the fact that it seems they are luring him in, he predictably enters the only route Seria has given him. There, she confronts him in the entrance hall and says how she thought he would choose this route, the two schoolmates. Motoharu mocks her ineptness as he can simply shoot her from his position and she has no cover. But Seria reiterates her point and blankly states that she has total control over him. Motoharu asks if the Agitate Halation Project is important enough to warrant the "death" of his sister, to which Seria states that she has no obligation to answer him. Motoharu reminds her that he has the Wildcard coccus, but Seria states that Motoharu had no intention of releasing the bacteria in the first place as he didn't have the guts, as is the reason why she isn't wearing a mask and protective suit. Seria notes on how he didn't just scatter it beforehand and even had to contact them saying that he does so as proof of her knowledge, and she was right. Kumokawa Seria has profiled Motoharu before he arrived. Seria points out that Motoharu likes to thinks himself different from other people in the dark side of Academy City, a sense of professionalism that would not allow himself to involve people who are not part of the dark side, as such he will not used W. coccus. Hearing this, Motoharu asks her if he can read his pain, to which Seria says that it is cliched. Motoharu agrees, but warns her that she doesn't everything about him and that even if her data on him is accurate it is still faulty. Seria points out that what he's thinking is because she led him to thinking it. And with that, there is nothing left to discuss between them.

Wanting to quickly eliminate her, Motoharu makes the first move and takes out a fully automatic handgun. He shoots at her, but it did not hit her. Despite his marksmanship, and the fact that Seria did not do any special tricks, none of the bullets hit her as she descends the staircase. She keeps on smiling and asks if he thought that a full automatic weapon would make his "heart" disappear. She tells him that no matter what weapon he wields, so long as it is wielded by human hands, the human hear will bleed through, allowing for it to create an opening that she can take advantage of. Motoharu, annoyed takes a handgun that was rigged to become an explosive. With a range of three meters, the handgun explodes, but Seria remains unscathed, and once again mocks Motoharu. He shoots his handgun on her, trying not to let her advance, but it does not good against her. Kumokawa Seria has analyzed and read every move Tsuchimikado Motoharu has made as well as used her surroundings to influence his decisions. Using her mind, she took control of their "hearts" and made use of their fear to make them lose their true potential. Seria decides to walk leisurely according to rationalizations. Motoharu approached right in front of her, abandoning his weapons and opted for hand to hand combat. However, Motoharu was an open book, and she could read all of his moves, claiming that his status has dropped to the same level as an average high school girl. Suddenly, Motoharu's hand reached out and plucked out her eyeballs. However, despite this, Seria simply mocks at his attempts. With a smile, she revealed a hidden handgun inside her sleeve and shot at Motoharu's gut, making him collapse. Seria points out his flaw, she states that he was the type to slowly savor his revenge, but when he started to eliminate her as quickly as possible, he should have realized that he was being led on by her. With the deed done, Seria tries to call Tsugutoshi on how it is over, and to prepare the parts she had put in Micro Cosmos as a replacement for her missing eye.

Just then however, she felt a strange pressure in her chest. She soon discovers that Motoharu is still alive and that he is using her eyeball for a spell. It is magic, something Seria has no knowledge about on Motoharu, the only missing part in her profile on him. Using her eye as a medium, Motoharu was able to put a curse on Seria and she collapses, a battle won out of simple lack of information.

Seria comes to after Motoharu has left to get to Tsugutoshi. Exhausted, Seria could only move her fingers, she took her phone and used an anonymous address to contact someone who could stop Motoharu. Influenced by Agitate Halation, using all her might she sent a message to someone whom she deemed to be a hero that could stop Motoharu, Kamijou Touma. Before Touma arrives, Seria later withdraws from the building. Much later, her missing eye is replaced.

After the events of the arc, and having her eye successfully replaced, Seria is sent to execute Motoharu for his actions. There on a bridge, he greets asking if her eye is okay, to which she states that it has been eight hours, as such she doesn't feel strange in the eye anymore. With that done, Seria asks him if he is ready, and he confirms it. She takes a large handgun and fires paint rounds on him containing his blood. The force knocked him out into the river. And though, he is still alive, convincing the dark side is all it takes that would allow him not to be attacked again by them as they already have given the sign that they were convinced. It was the etiquette in the dark side of Academy City. Seria then contacts Tsugutoshi to confirm the "kill", he asks if she will recover the body, but states that someone else will pick it up for them, as because the both of them knowing each other may cause strange conspiracy theories if she did, like the execution was an act and that he is still alive. Hearing this, Tsugutoshi states that it would be best to let their enemies pick him up. With that, she ends her call. Her punishment of Motoharu for taking her eye is done, and her sparing of his life by her was because it was thanks for not telling Touma about her.

Shifting and Fluctuating World
In the second recreation of the world by Othinus, known as the Version_Beta world in-text, where another "Kamijou Touma" exists living Touma's life. Both Seria and Maria are first seen walking home together. Ever they busybody, Maria complains about Seiri moving again, but the latter mentions that it is not something to be worried about, much to Maria's chagrin. As they argue about Seria's inherent laziness, Seria mentions that she is relieved that Maria's obsession with working only applies to her, and that she was worried that Maria might live in some guy's house, casually mentioning "Touma" of course. As they argue of who really likes "Touma", he and Index come upon them as they ride a bike. After much arguing, Index slams the breaks and catapults "Touma" out of the bike. This eventually leads to "Touma" falling between Maria's legs, much to both Seria and Index's chagrin. Maria tries to explain to Seria on how she is fine with it because she wears panties for her abilities. As "Touma" is in danger of being bitten by Index, he gives Maria a piggyback ride, his head between her thighs in order to stay Index biting him, knowing that she only bites him. Maria naturally cries out as he does so, and gathered strength in her thighs to keep her balance, annoying her sister Seria. "Touma" tells to Index to calm down or else he won't put Maria down while they shop, though Maria as well doesn't want to be piggybacked either while they're shopping. Index agrees with him, stating that she will have to master some techniques using her arms and legs, much to "Touma's" horror. Seria then mentions on how Maria is grinning a little bit, and casting aside her cool and intellectual demeanor, screams and dropkicks on "Touma's" back. He falls, but Maria manages to land safely. He later ends up in Index's skirt, to which she tells him to prepare himself for some pain. Both Maria and Seria attack him as well afterwards.

In the final recreation of the world by Othinus created specifically to break Touma's spirit, known as the Version_Omega world in-text, where several characters from the original world have been "saved" or have not experienced great tragedy, the now-broken Touma partakes his "last meal" as he decides on the method on how he should kill himself, he sees Seria again, but this time with Misaki. As they usually are, the two of them are arguing after Misaki uses her power to cut in line with elementary students just for a hot-dog.

VS the World
Seria later contacts the Hikoboshi II to inquire to Amano Kaguya on what she is going to do after Academy City decided Kamijou Touma and Othinus should be killed. Here she is teased for being Touma's "ally" and discovers that Kaguya was tasked with firing a cargo at Touma and Othinus' location using the S5.

Daihasei Festival Arc
A small part of her body is shown wearing the A Certain High School's PE uniform during the the three-legged race in which Misaka Mikoto and Kongou Mitsuko competes in. She is a commentator along with the Pirate Radio DJ found in Toaru Jihanki no Fanfare. Here, she refers to herself as "Bare navel headband."

Toaru Majutsu no Index Light Novel Volume SS2
She debuts in the side story. She is the one that proposed using the SISTER clones that's going through "adjustment" in various parts of the world to collect the 50 or so 'gemstones' and keep them under their protection, so as to resolve the issue of governments and/or various other agencies from forcibly taking control of natural born espers, or 'gemstones', to try and build another esper research facility (even though according to her the chance of them discovering a way before they end up killing the gemstones like lab rats is zero) opposed to Academy City, It is implied she made some sort of deal with Heaven Canceler in order for the SISTER clones to be mobilized. .

Toaru Majutsu no Index: Love Letter Competition

 * Main article:Toaru Majutsu no Index: Love Letter Competition

Seria is the main character of a short story found in the artbook Rainbow Spectrum Colors by Kiyotaka Haimura, in this story she set ups a plan on where she will catch a spy by using a love letter from her to Kamijou Touma, under the logic that the spy will believe the love letter to be an actual important confidential message from Seria to Touma; for this purpose Seria creates a great ruckus and makes it quite known that she wrote a letter to Touma. At the end of the story not only Kumokawa catches the spy, but it is also slightly hinted that she is aware of Touma's memory loss.

Abilities
Seria has no special powers, but has a very high intellect instead. She is shown to be an extreme planner, in that she orchestrated a plan to catch the spy by using a "love-letter" to deliver to Kamijou Touma, so as to create a ruckus and let the spy think she is delivering secret documents.

She is also said to be an expert in manipulating people's 'hearts', using only words or hypnotic suggestions, making her enemies fear her and create a mistake if they panic. This, combined with her intellect also allows her to predict people's actions. Even against an expert assassin with weapons like Tsuchimikado Motoharu, she was able to control most of the battle until he used Magic, which is outside her knowledge. Seria is also able to apply self suggestion on herself to dilute pain, but she comments that it isn't perfect.

Later on, it is shown that she's physically adept to perform a dropkick with enough strength to send Touma flying while at the same time catching Maria that fell from the air. .

Design evolution
Seria's design remains static throughout the series. Haimura strayed from making look moe, as she has an extreme facial expression that is difficult to convert into a standard moe format.

Quotes

 * (To Kaizumi Tsugutoshi, from NT 1): "Kumokawa Seria, the Super JK Tactician bossed around by the Board of Directors, is here!! I’ll dull the judgment of any pure boy☆!"
 * (To Fukiyose Seiri, from Love Letter Competition): "Oh, well, let's ask someone else. Hm, who should I look for...? Maybe that person with black hair, a huge forehead, and large breasts, the one imitating me?"
 * (To Kumokawa Maria, from NT 5): “By the way, I have a serious question for you. Is it true you fell in love with Kamijou Touma in Eastern Europe? If so, it’s time for full-on soap opera mode.”
 * (To Tsuchimikado Motoharu, from NT 7): "Are you aware you are only thinking that because I led you to think it?"
 * (To Tsuchimikado Motoharu, ibid): "Did you think your ‘heart’ would disappear if you used an explosive?"