TV-Series
Description
Chifuyu Orimura is a central figure in the narrative, serving as the homeroom teacher of Class 1-1 at the IS Academy, the supervisor of the first-year dormitory, and the older sister of the protagonist, Ichika Orimura. At twenty-four years old, she stands 166 centimeters tall. Chifuyu has a sharp, authoritative presence, characterized by her long black hair which she typically wears in a ponytail and her keen, perceptive eyes. Her usual attire is a formal black suit, which complements her regal and dignified demeanor.

Chifuyu was once the Japanese representative pilot for the first-generation Infinite Stratos units and is widely considered the strongest pilot in history, a living legend. She famously piloted the world's first IS unit, the White Knight, and later used another unit called Kuresakura (or Twilight Cherry). Her undefeated record includes winning the championship in the first Mondo Grosso tournament, a feat that earned her the nickname Brunhilde, a title she personally dislikes. Her career as an active pilot came to an abrupt end following an incident involving Ichika's kidnapping, leading to her immediate withdrawal from a tournament she was favored to win and subsequent retirement from active competition. Following this, she served for a time as an instructor for the German military, where she personally trained Laura Bodewig.

In her youth, Chifuyu and Ichika were abandoned by their parents, forcing her to become his sole guardian and protector from a very young age. This background is the foundation of her intense, complex personality. On the surface, especially in her professional role, Chifuyu is exceptionally strict, disciplined, and unwavering. She is feared by students as a demon teacher who does not hesitate to enforce rules with swift discipline, including physical reprimands. In private, however, she reveals a more relaxed and even careless side. She is notably poor at household chores, often leaving most of the cooking and cleaning to Ichika. She also enjoys drinking alcohol, and when she does, she becomes much more relaxed and playful, often teasing those around her.

Despite her outward severity, Chifuyu's primary motivation is to protect Ichika, whom she considers her only family. This intense protectiveness manifests in contradictory ways. She demands he call her sensei at school to maintain professional distance, yet she openly states that a younger brother belongs to his older sister. She is fiercely jealous of the attention other girls give him, but as an educator, she also pushes him to improve his piloting skills and learn to understand others, knowing his survival may depend on it. She has an uncanny ability to read her brother's thoughts and habits, a result of having raised him. This insight reveals her deep, underlying concern for his well-being, which she often masks with a cold or sarcastic remark.

Within the story's events, Chifuyu acts as the ultimate authority figure and final line of defense. While she rarely participates directly in the students' battles, her presence looms large over every conflict. She is a key figure in the larger mysteries surrounding the IS units. She shares a long and complicated history with Tabane Shinonono, the genius creator of the IS. While they were childhood friends and classmates, Chifuyu remains deeply wary of Tabane's dangerous and unpredictable actions. Her relationship with other faculty member Maya Yamada is one of close friendship and camaraderie, providing one of the few outlets where she shows a more relaxed and human side.

Chifuyu's character development is tied to the revelation of her own origins. It is disclosed that she and Ichika were created as part of a scientific project known as Progetto Mozaika, designed to produce superior humans. Chifuyu is the first successful specimen from this experiment. This knowledge adds a layer of tragedy to her fierce protectiveness, as her entire existence has been defined by her role as a guardian and a living weapon.

Chifuyu's abilities are legendary and extend beyond even her skill as an IS pilot. She possesses phenomenal physical strength and combat prowess, capable of fighting on par with or even defeating IS units while wearing only her regular clothes. She has been shown blocking an energy blade and subduing an IS pilot with nothing more than a spoon or her bare hands, demonstrating that her power is inherent and not dependent on the machine. Her technique with a blade is exceptional, rooted in her training at the Shinonono dojo, and her understanding of IS technology and combat tactics is unrivalled, placing her far above any other pilot in the series.
Cast