The title character and leader of the S.O.S Brigade. Her energetic and eccentric character proves to be a driving force for the series. Her eccentricities cause her to stand out from day one, such as openly declaring her desire to meet aliens, time travelers and espers as part of her high school entrance greeting to the entire class. Haruhi pulls various stunts as 'publicity' for her S.O.S Brigade, a group she formed thanks to a sarcastic remark courtesy of Kyon. Such stunts range from dragging her entire group around the city searching for 'weird phenomena' to dressing Mikuru and herself (and Nagato if she could afford it) up in bunny girl outfits and passing out fliers by the front gate. As the story progresses she and Kyon become close thus where she begins to develop feelings for him.
Kyon:
The main protagonist of the series. He is a student, with whom Haruhi willingly interacted. Even though Haruhi is the title character, the story is told through his viewpoint. Through narration and dialogue, he provides his insight, perspective, and opinions on the series' events. While Kyon's intentions toward defending his Brigade fellows from Haruhi's madness are often well intentioned, he often has to struggle to overcome the crazy and often ridiculous obstacles barring his way. While he's not afraid to stand up to a Haruhi tangent, he does exhibit a form of fear over her occasional troublesome antics that could threaten expulsion or worse. Kyon is, in fact, a nickname. Kyon's real name has yet to be revealed.
Yuki Nagato:
A Data Entity whose responsibility involves the monitoring of Haruhi and the investigation of the events three years prior to the present story. As a Data Entity, she possesses the ability to manipulate the surrounding environment as she sees fit. For the movie, Yuki, never heard to voice a complaint of any kind, was pushed into playing the evil alien witch, complete with the stereotypical witch costume and the mysterious talking cat belonging to Kyon. Yuki rarely speaks, choosing her books over idle conversation nine times out of ten. On the rare occasion she does choose to explain something, all middle ground is lost. She goes in depth and in detail, with nothing left out, often going into run-on sentences without stopping for a breath, even.
Mikuru Asahina:
She is a time traveler. She is assigned from the future to investigate the reason for the inability to travel to any point in time before three years prior to the present story. Mikuru is very shy and timid and unfortunately, the odd end out of many a Haruhi eccentricity. Whenever she speaks of her mission or of her time plane, she inserts the word 'classified' into spots that would ordinarily reveal important information. In the English version, she answers all of Kyon's probing questions with 'That's classified'. Occasionally, Mikuru's older self will appear in the same time plane, essentially threatening a time paradox should anyone other than Kyon find out, meaning these visitations are exceedingly rare and unpredictable. Mikuru was forced by Haruhi to play the role of a time traveling battle waitress from the future in a parody of many different magical girl anime.
Itsuki Koizumi:
He is an esper. He suddenly acquired the knowledge and powers of an esper three years prior to the present story. Along with other espers, he uses his power to combat beings of energy within Closed Spaces created by Haruhi during times of fitful irritation at the lack of strange phenomena in her world. Like with the other members, his so-called Agency and its members are never explored in-depth. In the movie, Itsuki was pushed into playing a typical, somewhat dizzy and scatterbrained high school boy with powerful hidden abilities that could only be brought out (in a rather hastily written and badly-acted fashion) by a catalyst of some sort.
Although I do find Itsuki Koizumi really attractive whee heart
