OVA
Description
Hikaruno Kagaribi is a character who appears in the Infinite Stratos 2: World Purge OVA. She is a 24-year-old female scientist who holds the position of director at the Kuramochi Technical Research Institute’s second laboratory, specializing in Infinite Stratos software development. Her age places her as a contemporary of both Chifuyu Orimura and Tabane Shinonono, with whom she shares a past as a high school classmate.

In terms of appearance, Hikaruno is recognized for her sharp, elongated eyes and a striking, voluptuous figure that is often compared to that of Maya Yamada. She has curly turquoise hair typically styled in short twintails. Her manner of dress is highly unconventional and contributes significantly to her memorable first impression. She is commonly seen in a form-fitting navy blue IS suit that features a name tag reading Kagaribi on the chest, paired with a lab coat and swimming goggles worn on her head. During her initial appearance, she arrives directly from fishing, wearing her wet IS suit and carrying a spear and a freshwater fish.

Her personality is best described as eccentric, high-spirited, and completely free-spirited, with a behavior pattern many find analogous to that of Tabane Shinonono. Hikaruno operates with a bold and uninhibited nature, seemingly unconcerned with social conventions or the impressions she leaves on others. This is most prominently displayed through her conduct toward the protagonist, Ichika Orimura. Upon their first meeting, she immediately groped his buttocks without any visible shame, an act she repeats whenever the opportunity arises. She openly flirts with him and, despite their age difference, has invited him to her room with clear sexual intentions, though she once clarified that the invitation was for a game of Old Maid. This behavior leads Ichika and those around her to label her as a pervert or a weirdo, and they often find her antics exhausting.

Hikaruno's primary role in the story is that of a technical expert. She is responsible for the maintenance and data collection of Ichika's personalized IS unit, Byakushiki. Her professional motivation is driven by a deep curiosity and passion for IS technology. She states that she enjoys the challenge of readjusting picky IS units and collecting new data from them. The data she acquires from maintaining Byakushiki is utilized to advance her ambitious Next-Generation Mass-Production Model Project, showcasing her competence and innovative drive in the field of IS software.

Regarding her key relationships, Hikaruno clarifies her connection to Chifuyu Orimura and Tabane Shinonono by describing herself strictly as a former classmate, not a friend. While she is not on bad terms with either of them, her relationship is distant. Tabane Shinonono has notably dismissed her as being years behind, indicating a lack of rivalry from the more brilliant scientist's perspective. Hikaruno's most significant interaction is with Ichika, whose status as the younger brother of her former classmate piques her interest, leading to her persistent and uncomfortable flirting.

While Hikaruno does not undergo significant character development within the limited scope of the OVA, her portrayal is consistent. She establishes herself as a highly intelligent and capable scientist whose unorthodox methods and eccentric personality make her an unforgettable presence. Her notable abilities lie entirely in her intellectual and technical prowess, specifically her expertise as an engineer and software specialist in the advanced field of Infinite Stratos technology.