Miyako is the heir apparent to a massive commercial conglomeration, not to mention a beautiful, well-mannered girl. Though she tends to be serious and straitlaced, she has her flashes of humor. Between her earnest kindness and her good looks, she's popular among both boys and girls. Despite her family’s affluence, she’s quite the penny pincher and considers going out for fast food to be splurging. Miyako is a straight-A student, but she thinks of herself as hard-headed, so she comes to value the protagonist’s flexible mindset. Soon enough, she comes to rely on him, and it isn’t long before she opens up and shows him her warmer side. She works part-time at the café her grandfather owns, trying to build real-life experience and save money. Having awakened to supernatural powers when she obtained a mysterious piece of jewelry—an Artifact—she’s driven by her strong sense of justice to solve the mysteries around town.