Hiro Sasaki is a main character in the anime series 'Hidamari Sketch.' She is a senior student at Yamabuki Art High School and lives in the Hidamari Apartments. Hiro is known for her caring and nurturing personality, often acting as a motherly figure to her friends. She is particularly close to Sae, and the two share a deep bond. Hiro is also conscientious about her weight and is often seen dieting, which adds a humorous element to her character. Her role is pivotal in providing emotional support and guidance to the other characters.