This is a list of the characters featured in the Haruhi Suzumiya franchise, written by Nagaru Tanigawa and illustrated by Noizi Ito, which contains a multitude of other secondary, and minor characters who are introduced throughout the course of the series. The main characters in the series are the five members of the SOS Brigade, including the titular Haruhi Suzumiya.
SOS Brigade members The SOS Brigade is an unofficial club at North High School, founded by Haruhi Suzumiya to investigate mysterious events.
Kyon
is the protagonist of the series. Kyon's real name is never given, and everyone calls him by his nickname, given to him by his aunt.
Kyon is a student at North High with a laid-back and sarcastic attitude. He's drawn to Haruhi's unusual approach to life and begins talking to her daily before class. Kyon is often annoyed by Haruhi's demands, but in The Sigh of Haruhi Suzumiya, he comes to the realization that he always goes along with them without hesitation, meaning that he enjoys the activities Haruhi orchestrates more than the dullness of ordinary life; he likens himself to a boy who complains about the lunches his mother prepares for him even though he won't make his own.
Yuki, Mikuru, and Itsuki reveal what they are to Kyon, saying they believe him to be a key figure because he is the only normal human Haruhi chose to interact with and because he has led to her behavior becoming more unsettled than in recent years. Kyon meets a middle-school-age Haruhi while time-traveling, introducing himself to her as "John Smith", and was the one who painted the hieroglyph in the field. Later in the series he more openly expresses his fondness for Haruhi in his narrative (though not in conversation), expressing a profound enthusiasm for seeing her happy. He becomes uncomfortable when he meets with other girls on a one-on-one basis and goes to great lengths to prevent Haruhi from finding out about these encounters.
In an interview, Nagaru Tanigawa admitted that Kyon was to be an esper in his original conception, but while writing The Melancholy of Haruhi Suzumiya, Kyon was instead changed into an ordinary student. He is the main character of the spin-off series The Disappearance of Nagato Yuki-chan. In The Surprise of Haruhi Suzumiya, Kyon time leaps and briefly meets a college-age Haruhi with another version of himself on campus, where the two appear to be close.
Haruhi Suzumiya
is the title character, the heroine, and leader of the SOS Brigade, whose energetic and eccentric character proves to be the driving force for the series. She has a mind for adventure which often leads her subordinates to be swept into her plans. Haruhi's goal is to find aliens, time travelers and espers. While smart, beautiful, and energetic, Haruhi was eyed as an oddball ever since middle school: She set all the desks from her classroom out into the hallway, painted stars on the roofs, and even drew a huge hieroglyph on the school field (though this was later shown to be Kyon). Haruhi cannot stand boredom so she comes up with activities for the SOS Brigade, making them participate whether they like it or not. In the sixth grade, Haruhi felt she was no longer special after going to a baseball game and realizing she was one in a sea of people. After that she set out to make her life interesting and unique. What Haruhi does not know is that she has the power to change the world as she pleases. By subconsciously using it, she gathers Mikuru Asahina, Itsuki Koizumi, and Yuki Nagato into one place: the SOS Brigade. The story is indirect in saying how much Yuki, Mikuru and Itsuki know about each other.
She is an important character in the spin-off series The Disappearance of Nagato Yuki-chan. She retains her character from The Disappearance of Haruhi Suzumiya, in which she has no powers to alter reality and is a normal high school girl who attends Kouyouen Academy with Itsuki Koizumi. She retains her goal of finding aliens, time travelers and espers, as well as her energetic and eccentric character. However, she is much more open about her feelings for Kyon; she takes him out on a date in "Be My Valentine", and in "Her Melancholy", when asked if she is in love with Kyon, she gives a neutral answer.
In an interview, Tanigawa stated that the idea for the character came during a sleepless night at the beginning of the 21st century. Haruhi is considered to have tsundere character traits but is perceived by some as "too energetic" to be a true tsundere. In 2009, IGN ranked her nineteenth on their list of top 25 anime characters.
Yuki Nagato
is a bibliophile humanoid interface that was created by the god-like figure called the Data Integration Thought Entity. Yuki's responsibilities involve monitoring Haruhi and the investigation of an unexplained "explosion of data" three years before the present story. She can manipulate her surrounding environment, or "data" as quoted by her. Yuki is usually very terse but can speak at length when it has to do with her mission or a problem that has arisen. While she always seems engrossed in her reading, she comments that she is only relatively interested in them. Yuki gives hints and aid to Kyon. Due to her extraterrestrial nature, she almost never displays involuntary emotional responses or tics, but there are times when she shows interest in things, such as programming computer games and playing them, as well as reading.
In The Disappearance of Haruhi Suzumiya novel and film, the unpleasant emotions developed throughout the series, caused by the people around her, make her wish for a normal world, and she betrays the Data Integration Thought Entity and the SOS Brigade to make her wish reality. After the situation is resolved, the Data Integration Thought Entity contemplates withdrawing Yuki from Earth due to the danger her instability poses; this is an ongoing subplot for the remainder of the series.
She is also the heroine of the spin-off series The Disappearance of Nagato Yuki-chan. In this series, Nagato is a drastically altered version of her character from The Disappearance of Haruhi Suzumiya: she is not a bibliophile (in "Someday in the Rain" Kyon goes so far as to say she has never shown the least interest in books), and instead plays portable video games obsessively, even neglecting sleep to do so. She has a crush on Kyon (her classmate in this universe) and idolizes Haruhi Suzumiya, admiring her confidence and sense of personal pride. In "Give Me Your Hand..." she has an accident, a near-hit with a car that possesses her with a different personality, the quiet and stoic character shown in The Melancholy of Haruhi Suzumiya. With her inevitable disappearance drawing near, she confesses to Kyon before she disappears with the other Yuki taking her place.
Mikuru Asahina
is a time traveler from the distant future who is assigned to investigate the reason behind the inability to travel to any point more than three years before the present story. Mikuru is a soft-spoken girl, the lowest in her Time Travelers' Committee. At the beginning of the series, she is kidnapped by Haruhi and regularly used as sex appeal. She often tries to explain what is going on but is heavily censored by an undisclosed future technology which makes her say "classified information" in place of anything she is not authorized to speak about to people of the past. Haruhi loves dressing up Mikuru in (usually embarrassing) outfits, claiming that she is the "mascot" of the SOS Brigade.
Kyon appears to have a crush on her. Haruhi is jealous of her and Kyon's relationship at first, but later in the series is increasingly unconcerned with their interactions. Despite this, Mikuru remains terrified of her. In the anime and novels Mikuru discourages Kyon from acting upon any feelings that he may have for her, explaining that he is Haruhi's "chosen person." In The Boredom of Haruhi Suzumiya light novel she implies that if he is nice to her, bad things will continue to befall her. She is also a supporting character in the spin-off series The Disappearance of Nagato Yuki-chan, in which she is not a time traveler but retains her character from The Disappearance of Haruhi Suzumiya.
Itsuki Koizumi
is an esper who, like the other members of "The Agency," suddenly acquired the power to explore "Closed Space" and combat the Celestials that Haruhi Suzumiya creates when she is stressed three years before the present story. He is fairly carefree and always smiling. Kyon is annoyed by his habit of putting his face close to that of the person he is talking to, his arguing contradictory theories for rhetorical purposes, and his half-joking insinuations of a romance between Kyon and Haruhi, and often threatens to hit him. He openly expresses fondness for the other SOS Brigade members, Kyon and Haruhi in particular, but explains to Kyon that Mikuru, or anyone, could be putting up a fake personality and deceiving everyone.
Unlike Mikuru, Itsuki believes that aliens, time travelers, and espers would not normally exist, and were created three years ago when Haruhi wished for them to exist. He is also a supporting character in the spin-off series The Disappearance of Nagato Yuki-chan in which he is not an esper, but a normal high school boy who attends Kouyouen Academy with Haruhi Suzumiya. He retains the same character he had in The Disappearance of Haruhi Suzumiya where he is in love with Haruhi.
Yasumi Watahashi is a student who briefly joins the Brigade in the tenth novel, claiming to be a first-year student at North High. She is instead a literal deus ex machina, created by Haruhi to block Sasaki's interactions with Kyon. When the crisis is resolved, she disappears from existence with Haruhi believing she was a middle school student who sneaked into the brigade. When written out in katakana, her name forms an anagram for 'I am Suzumiya' ("Watahashi wa Suzumiya").
Other North High students
Ryoko is Yuki's backup and, as such, is another "humanoid interface." Like Yuki, she finds it difficult to empathize with humans. Unlike Yuki, she possesses exceptional social skills, and successfully passes herself off as a compassionate and hard-working high school girl. Her enormous popularity made her the unanimous choice for class president of Kyon's homeroom. She is unable to befriend Haruhi in order to better observe her, so when she notices Kyon successfully interacting with Haruhi, she encourages him to "open her up to the class". She later tries to kill Kyon with a combat knife in the hopes of catalyzing an observable reaction from Haruhi. Yuki stops her and removes her from the school, using the cover story that Ryoko moved to Canada. Ryoko returns in the light novel The Surprise of Haruhi Suzumiya, fulfilling her role as Yuki's backup when Yuki is disabled by the Heavenly Canopy Domain. However, the Data Integration Thought Entity still regards her as a risk due to her attempt to kill Kyon, and she is given limited authority to act. An alternate version of Ryoko appears in The Disappearance of Haruhi Suzumiya. In this story Yuki alters reality to make herself a normal human, and remakes Ryoko into a protector for her. She is destroyed by another Yuki that came from a few months later in order to restore reality to its former state.