Arisaka, Hatsune

有坂初音

Hatsune is Kazuki's older sister, who persistently attempts to bring Kazuki and Yuuji together, inadvertently placing them both in embarrassing and lascivious situations. There are some indications that she finds these mishaps (and the subsequent arguments) amusing. She is extremely popular at school, with many clubs eager for her membership. Hatsune excels at everything she does, from cooking to sports, and is extremely well-endowed. She enjoys teasing her sister by demonstrating how infatuated Yuuji is with her breasts. Hatsune frequently engages in cosplay around the house and can, from time to time, be quite frightening to those around her. Unlike her younger sister and Marie, Hatsune is perfectly unafraid of insects—or anything else. Although it is implied that Hatsune's true weakness is worrying about her sister's health. When Kazuki fell ill with a cold, Hatsune became comically uncoordinated and unskillful in cooking. She occasionally (and sarcastically) appears to have an attraction to her younger sister.