Sahono Ashisu is the 13-year-old younger sister of the series' main character Sahoto Ashisu and a first-year middle school student. She displays a playful, teasing nature, especially toward her older sister, deliberately provoking her through actions like sharing Sahoto’s embarrassing childhood photos without consent. Beneath this mischief, Sahono holds genuine concern for her sister’s welfare, initially worrying about Sahoto living alone. Those fears faded after Sahono met Yuuki Aito, whom Sahoto assists, as she saw Yuuki as a dependable mentor for Sahoto. Demonstrating ongoing familial interest, Sahono occasionally visits Sahoto and Yuuki at their apartment when possible. She has black hair and brown eyes.