Ichiko Rokujō is a tan-skinned young woman with short brown hair secured by a white hairpin on the left side, frequently dressed in a red-and-white tracksuit. In her later years, she adopts long hair and a blue dress, with a flash-forward scene showcasing her in a sundress—a transformation so pronounced it momentarily obscures her identity to former students.

As Hime Gotō’s teacher, she collaborates with Hime’s father, Kakushi, to shield his manga artist career from his daughter. Her loyalty and unspoken affection for Kakushi anchor her role as a dedicated secret-keeper within the Gotō family, despite his lack of romantic reciprocation.

Energetic and resolute, Ichiko’s spirited nature emerges in her relentless pursuit of social acceptance during her school days and her adult perseverance in balancing playful jealousy—such as during a sports festival observing Kakushi’s interactions—with steadfast dedication to safeguarding his secret.

Older iterations of her character reveal a calmer demeanor contrasting her youthful tomboyishness, exchanging fitness wear for subtler femininity. Flash-forward glimpses confirm her enduring ties to Hime’s friends, hinting at sustained influence beyond her academic tenure.

Her surname, combining "six" and "ray of light," alongside her given name meaning "child" or "the only child," underscores narrative themes of individuality and quiet impact.