She is an aspiring burnout writer, who currently works at Midori Bookstore. Sumireko is a 28-year-old woman with medium-length brown hair, which she often styles in a bun with strands of hair cascading down both sides of her face. She has short yet thick brown eyebrows and round irises of the same color. Sumireko has a prominent mole under her right eye and a huge chest. She is often seen wearing a dark violet tank top underneath a green jacket. At work, she wears an apron over her clothes.