Chihaya Ikaruga, a 15-year-old third-year junior high student, serves as the second youngest member of the Ikaruga family. Renowned for her unflinching candor on intimate subjects, she distinguishes herself as the most openly expressive sibling. Her career as a professional mangaka thrives on weaving real-life interactions with family and Yoichi Karasuma into fictionalized resolutions for her manga, strategically reshaping their experiences to fuel her narratives.

She possesses striking green hair, crimson eyes, and a petite frame of 1.49 meters, with proportions of 86-53-81. Glasses and prominent hair antennae—a nod to Naru Narusegawa from *Love Hina*—set her apart visually from her relatives. Though enrolled in cram school to compensate for frequent absences caused by her relentless manga deadlines, she remains a passive participant in remedial sessions, prioritizing her craft over academic engagement.

Intellectually sharp and mischievously perceptive, Chihaya deftly provokes her siblings and Yoichi, mining their reactions for creative material. Her calculated orchestration of scenarios—particularly those probing romantic tensions—reveals a nuanced grasp of familial dynamics. Nights often find her immersed in marathon drawing sessions, a testament to her unwavering dedication to meeting editorial demands.

The name Chihaya, formed from the kanji for "thousand" and "early," pairs with Ikaruga—combining "spots" and "pigeon," while evoking ties to a Japanese town and temple. This etymological layering enriches her cultural identity. Episodes centered on her perspective underscore her dual impact on the story: through both her artful manipulations and the narrative ripple effects of her manga creations.