Chihiro Ibusuki is a secondary character in the story, appearing as a sixteen-year-old high school student and the cousin of the protagonist, Ichiro Kuga. She is depicted with black hair cut to neck-length and green eyes, and she typically wears a school uniform with a neckerchief. Her living situation is somewhat unique, as she resides alone in an apartment managed by her cousin, Ichiro. This arrangement establishes a baseline of trust and dependency within their family dynamic.

In terms of personality, Chihiro is portrayed as an introspective and bookish young woman. She has a deep love for literature, enjoying reading novels and, more notably, writing her own stories. This creative inclination suggests a rich inner world and a tendency toward observation rather than overt action. Regarding her motivations, Chihiro harbors a quiet and silent admiration for her cousin Ichiro. This feeling is complex, as she regards him with the affection one might have for an older brother figure, yet there is also a subtle hint of romantic interest that remains largely unspoken. This internal conflict is central to her emotional arc, as she navigates her personal feelings within the bounds of their familial relationship.

Within the narrative, Chihiro serves primarily as a supporting character within Ichiro’s social circle. Her role becomes most apparent when she reacts to major developments in his life, particularly his burgeoning relationship with Shiori Goshiki. She is visibly shocked upon learning that Shiori is Ichiro’s girlfriend, a moment that highlights her previously concealed feelings and places her in a position of quiet emotional tension relative to the main couple. This reaction defines her key relationship, not just with Ichiro as a cousin and admired figure, but also with Shiori, whose sudden presence disrupts the established dynamic. Much of her development stems from processing this new reality and her own unexpressed emotions. Information regarding additional notable abilities or a significant character arc beyond this internal emotional journey is not available in the provided search results.