Setsuna Kuze

Setsuna Kuze is a fifth-grade student attending school on Amatori Island and the younger sister of main character Shiina Kuze. She is well-behaved and academically accomplished, with notable skills in household chores and tending the vegetable garden. Having grown up relying solely on her sister, she holds an intense love and dependence toward Shiina, who serves as both her only family member and her emotional anchor.