『Reki』

The Snipe department's ace, Butei rank S. She has no family name and is habitually taciturn, impassive and indifferent to fashion. Kinji later finds out that this, along with her hair color, is due to the influence of large quantities of RiriIrokane in her birthplace. RiriIrokane is Azure Irokane and it bestows the ability to nullify other powers when the subject is calm. However, according to a Hotogi Historical Record it'hates' human hearts and the princesses of the Ulus(to whom Reki belongs) revere RiriIrokane and offer their'hearts' to it. She's always seen wearing Sennheiser PMX990 headphones through which she apparently listens to the sound of wind from her homeland(somewhere between Northern Mongolia and Siberia). Her signature quotation is"I am a single bullet. It has no heart. Therefore, it does not think. It just flies straight towards its target", which she always say before she takes a shot. Her sniper skills are so high that she can shoot anything within a 2 km radius without missing her target. Her personal weapon is a SVD(Dragunov Sniper-Rifle) with an attachable bayonet.

In the middle of volume 3, Reki tames a wolf in a matter of 5 minutes, which she later names Haimaki, and trains to be a Butei dog. From then on, she lives together with Haimaki in her room in a girls' dormitory. Kinji has visited her room at least twice up to volume 6 of light novel and has noted how bare and simple it is. Reki also sleeps upright with the Dragunov in her hands, perhaps to prevent an ambush attack according to Kinji. On noting that Reki doesn't possess any clothing other than a number of school uniforms, and as a part of his Lima syndrome plan, Kinji buys her a casual outfit as a present. Reki cleans up nicely; in fact, Kinji was left speechless after witnessing her dressed-up appearance in volume 6.

She plays a minor role in the series, usually providing covering fire for Aria and Kinji when they are fighting at close range or saving them during times of trouble. At the end of volume 5, she holds Kinji at gunpoint on the rooftop of Butei High, kisses him and proposes marriage to him. She also reveals that she already knows about the I-U and Hysteria Mode. Her ancestors are revealed to be Minamoto no Yoshitsune and Genghis Khan. The Ulu tribe she belongs to only gives birth to girls(possibly due to a genetic flaw from being so insular.) Since there are only 47 members of the tribe(counting Reki) there seems to be no need to provide a second name. Her tribe practices a kind of reverse bride kidnapping as their courtship ritual, where the'bride' kidnaps the'groom'. Reki pursued Kinji and shot the buttons off of his jacket(without hurting him) at intervals until he'surrendered' himself to her. As an attempt to'break up' with her, he tried to get her to undergo Lima syndrome(where a kidnapper falls for victim), but was not completely successful in preventing himself from undergoing Stockholm syndrome(where the victim sympathizes with the kidnapper.) It is hinted that selecting Kinji as her'husband' was to provide, not only herself, but possibly the 46 other princesses of the Ulus, with strong children as well. Realizing that Reki would likely try to shoot herself as a result of her kidnapping him, Kinji sabotaged her last bullet. After this, Reki started living for herself and her friends(mainly Kinji) in contrast to her earlier habit of living solely for duty and obsessively obeying the'voice of the wind'.

Apparently, before coming to Butei High, Reki performed"unrecorded" jobs in Russia and China due to her Butei license. In other words, she worked as a"Sweeper".