Hikari Sawake, nicknamed Yōkō-san, is the older sister of Akari Sawake. She works as an office employee residing alone in a one-room apartment. Despite this independence, she regularly returns to her parents' house on weekends and days off. At the end of each workday, she unwinds with a favorite ritual: preparing coffee using beans freshly ground by hand in a coffee mill. She has long hair, variously noted as brown or blonde, and blue eyes.