长门有希

故事开始时为北高的一年级学生，是被SOS团占用的文艺部教室的仅存部员（学生会认定为文艺部部长），平时话不多，总是面无表情地看书（多是厚厚的精装书），一人独居在高级公寓内。她的真正身份是由存在于宇宙中的“信息统合思念体（Data Integration Thought Entity）”的人型终端机，在故事开始前三年所制造(也就是凉宫春日进入国中后，自觉该脱离平凡，开始热衷追求怪异事情的时间点)，用来与有机生命体接触的联系装置人型接口（Humanoid Interface）(角川中文版中称为外星人)，目前的任务是观察凉宫春日。她拥有藉著“改变空间信息”来操控物件的能力（如把球棒变成自动击出本垒打,将课室的桌子变为尖矛），并经常在各个事件中暗中发挥能力协助而深受阿虚信赖，因此在阿虚的内心独白有“长门大明神”的称号。即使不使用违反物理定律的操作也可以轻易侵入任何连在网络上的电脑。 除了书本外对电脑研究社自创的游戏也有点兴趣。初登场时的造型是个眼镜娘，在朝仓刺杀阿虚未遂后因阿虚的意见改为无眼镜的造型。随着故事的发展，她也逐渐露出各种感情。在《凉宫春日的消失》中，长门是众人里唯一个性改变的人物。

简介来自 Bangumi

Yuki Nagato is the third person to join the SOS Brigade. At first glance, she appears to be an introverted, taciturn bibliophile. She later reveals herself to Kyon as an alien created by the Data Overmind, and possesses supernatural powers as a result. She was sent to North High to watch over Haruhi Suzumiya, and over the course of her time there she comes to develop insights into being a person, as well as emotions (according to Kyon). She is commonly known by her surname "Nagato" (which is not unusual), as Kyon often called her by her surname, as opposed to how he almost always called Haruhi Suzumiya by her given name "Haruhi". (Edited from the Haruhi Suzumiya wiki)

简介来自 VNDB