- "So you think you'd be better off dead, huh? How bout putting up a little more resistance? I plan to, otherwise, I'm dead"
- ―Kaname Chidori
Kaname Chidori (千鳥 かなめ, Chidori Kaname) is the female protagonist of the series. She is often described as, 'The kind of girl everyone looks up to, but not even a boy wants as their girlfriend', as a male, fellow students put it. She's very much the loud mouth, speak your mind kind of girl; a trait she picked up when she studied abroad in the United States.
Still, Chidori has a softer side, having a crush on Sousuke if he'd just for once open up emotionally. Until then, she feels like she must protect him from the harsh, cruel world of high school - a place where he doesn't quite fit. She often uses a paper fan to hit Sousuke, besides berating him on how the kinds of weapons he uses are not exactly proper for a high school student.
Chidori had a dark blue hair and brown eyes. She wears a female uniform consisting of a short sleeved blouse, green skirt and red chest ribbon. She wears a black socks and pink white shoes.
Chidori is hot-headed and loud-mouthed, but she is also kind to her friends and Sousoke. She is always annoyed and furious by Sousoke's militaristic and overprotective foolishness including threatening people at gunpoint and using explosives at school which is the result of beating up Sousuke with a paper fan. She is a tsundere.
In the light novels, it is mentioned that her father and younger sister live in New York, United States. Her mother died of cancer roughly 4 years before the start of the series. Shortly after that Chidori ran away from home but returned the next day. Chidori's relationship with Shizu, her late mother and Ayame, her younger sister, is apparently friendly, but she is more tense towards her father, Shunya, who works for the United Nations as its environmental High Commissioner.
Her late mother's family also seems to have strained relations with the Chidori family, at least until her grandfather from that side makes amends. Because of her sensitive past, she developed a tough-lady attitude, which has helped her deal with her past and survive several life-threatening situations. In the novel A Dancing Very Merry Christmas and in the Full Metal Panic! Anime Mission fan book, it is also revealed that she shares her birthday with Tessa on December 24, 1984 (Christmas Eve).
Chidori lives alone in her own apartment across from the complex which Sousuke Sagara lives in. She takes on multiple part-time jobs and sometimes invites friends to join her, which often ends with a catastrophe because of Sousuke. She began attending Jindai Municipal High School at the age of 15 and is currently in her second year. She leads a normal lifestyle and is the class representative and vice president. She is quite popular at school. However, after Sousuke is transferred to her class, her life is turned upside down and she becomes involved in various Mithril operations.
Chidori's bravery and determination came to a head in the climax of the novel Continuing on My Own. Following Sousuke's defeat by the hands of Leonard Testarossa, she gives herself up to Leonard and Amalgam to save his life. As she is picked up by the Belial's giant hand, she whispers something to Sousuke before being whisked off. After being taken by Leonard, she is imprisoned by Amalgam at an island villa. In the novel Come Make My Day, Sousuke arrives at the island in order to save her, but is unable to do so as she is taken away in a helicopter.
In the most recent novel, Semaru Nick of Time, the origin of the Whispered is revealed to be caused by an accident during a Soviet experiment using an Omni-Sphere that occurred on December 24, 1984, when all the Whispered were born. Leonard Testarossa takes Chidori back to the Omni-Sphere after recovering from wounds in Come Make My Day. She is then forced to resonate with Sophia, a key Whispered, who overtakes Chidori's personality. Under Sophia's control, Chidori is shown the illusion of shooting and killing Tessa and Sousuke, and then leaves with Leonard for Merida Island, where Amalgam has built a machine to utilize the final ability of the Whispered. While under Sophia's control, she enters the machine and has an internal conflict with Sophia. Sophia tells her she can save her mother and do many things but Chidori refuses and states that she chose the reality she already lives in. She's saved and then goes back to the high school and she reunites with Sousuke and they confess their love and kiss in front of the whole Jindai High School.