Shana is the female lead of the show and a Flame Haze. She was formerly human (but as stated in the novels and manga, that once a human makes a contract with a crimson lord, they become a Flame Haze and live forever). Initially she is concentrated solely on her duty as a Flame Haze, going as far as to not bearing even a name. She sees Yuji only as a Torch, an object, marginally interesting because of his status as a Mystes. Yuji, in his need to humanize her, chose to name her "Shana" after her katana. However, she slowly opens up to Yuji, coming to think of him as a person, despite being a Torch, and eventually comes to love him. Until she met Yuji, she was identified by only her Flame Haze title "Flame-Haired Burning-Eyed Hunter," or her nodachi, Nietono no Shana, "Vairocana of the Offering Room"). Shana has a habit of saying "Urusai! Urusai! Urusai!" ("Shut up! Shut up! Shut up!") whenever Yuji asks her questions or makes remarks that disturb her original worldview or embarrass her. But in reality they really care for each other. She has a great fondness for sweets, especially melon bread. Shana is shown to be highly intelligent in the series, she has gotten a perfect score on every exam and is talented in Phys. Ed. She is shown, however, to be naive when it comes to social affairs, once even unabashfully asking "how babies are made".
Shana is clearly a powerful and talented Flame Haze, known and feared by most Tomogara by title alone. This has allowed her to defeat many powerful Tomogara along the plot, and permits her many different abilities, including her proficiency with the Nietono no Shana, the ability to wield flame, manipulate the power of existence, harbor extrasensory traits, and fly with wings of flame. In the third volume of the manga, the first volume of the visual novel, and the movie, Alastor states that the reason why she did not explode after being shot by Friagne's Trigger Happy was because she held a capacity that existed in dimensional space, who was able to contain the Flame of Heaven's and has thus stated her as "The Great One". Her duty initially made her indifferent towards human life, but through Yuji's influence, Shana has opened up slightly, although she still remains confused and disgruntled by some human traits which she considers as pointless, although some of it is used to mask her jealousy of her desired monopoly on Yuji.
Despite being the title character of the anime, Shana has few character relations with many of the characters in the show. Her main social interest is Yuji, whom she sees as her love interest, which she admits in the end of season one and multiple times in season two. Her relationship with Yuji is one of the driving forces of the series. Shana takes orders and advice from the Crimson Lord she is bond to, Alastor, and has a mentor and guardian in the form of Wilhelmina Carmel. Kazumi Yoshida is her love-rival for Yuji, and Shana treats her with contempt and disdain. She generally treats most other characters with ignorance and indifference, with the exception of Chigusa Sakai, who she looks to as a source in answering certain difficulties when Alastor or Wilhelmina are unable to do so. Shana eventually starts to be more open to the other characters, especially in regards to her relationship with Kazumi becoming more friendly.
In volume sixteen of the light novels, Shana is defeated by Silver the Second and currently kidnapped to Seireiden. However, by volume seventeen, Shana manages to regain her powers before she and a number of other Flame Hazes pursue Silver the Second in volume nineteen.
