Sumi works as a servant at the Butterfly Estate. She's got pale skin and distinctive black, button-like eyes that give her a pretty recognizable look. Her dark hair is styled in low twintails, held in place with blue butterfly clips that match the aesthetic of where she works. She's usually seen wearing a long-sleeved nurse uniform cinched with a blue ribbon, paired with knee socks and white shoes—the kind of outfit you'd expect from someone working in a medical facility.
Content compiled by AnimeList.moe from publicly available sources.