凉宫春日

故事开始时县立北高一年五班的学生，SOS团的团长，座位永远在阿虚的后方。不但容姿端丽，而且无论学业或运动都相当优秀，但是个性唯我独尊，对于不喜欢的话都听不进去。原本一直过著平凡的生活，但自从在小学六年级时看了一场棒球赛后，便发现自己原来是十分渺小的，生活也跟大众一样平凡乏味。因此，她在初中开始改变自己，不断做出各种怪事（如在晚上潜入学校操场画奇怪的符号其实是阿虚回到三年前画的），希望借此发现异常的事物，因此在东国中和北高都无人不晓她的名字，并将她当成怪人。 到了北高后，因为阿虚的一句话而灵光乍现，成立SOS团。极其冲动，而且好胜心极强，一有任何鬼点子（通常都是毫不经过大脑的）都要立刻执行，但是奔波受苦的一向都是阿虚跟朝比奈。拥有在本人不自觉之下改变现实的能力，世界会随她的期望而发展(很可能是因为她的期望而导致未来人宇宙人和超能力者的出现)，但因为仍有正常人的常识，世界才不致于被严重改变。这种能力导致她被各方势力关注中，但本人完全不知情。她对阿虚的感情比起对其他人深厚，在多部作品中，均显出她对阿虚的重视。

简介来自 Bangumi

Suzumiya Haruhi is the title character, the main female protagonist of the series, 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. While being 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 painted 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 an outstanding power to change the environment around her as she pleases. By subconsciously using it, she gathers Asahina Mikuru, Koizumi Itsuki, and Nagato Yuki into one place: the SOS Brigade. The story is indirect in saying how much Yuki, Mikuru and Itsuki know about each other.

简介来自 VNDB