笠谷 葉子

She is Rie's older sister and a 22-year-old female college student. She takes care of Rie in place of her parents who live abroad for work. She has a calm personality and is always temperate and kind. Unlike her sister Rie, she is fond of the main character and treats him like a younger brother. The main character also admires her and looks up to her like an older sister. [Translated from the the official site]