Hikage Miyakawa is a supporting character from the 'Lucky Star' spin-off series 'Miyakawa-ke no Kūfuku.' She is the younger sister of Hinata Miyakawa and is known for her mature and responsible personality, which contrasts with her older sister's more carefree nature. Hikage often worries about their family's financial struggles and tries to support her sister in daily life. Her role in the series is to provide a grounded perspective and to highlight the challenges faced by the Miyakawa sisters.