a university student of the Outside World's near future living in Kyoto, Japan. She and her friend Maribel Hearn make up the two-person "Hifuu Club", an occult club that seeks out and explores the "rifts in the boundaries of the world". (She is also a physics major) Renko is generally portrayed as being a confident person with an adventurous and daring personality. Her personality makes her a great support for Maribel. Renko usually wears a black hat with a bow, white blouse, and a black dress. she is also wearing a black shawl. She has brown hair shoulder length with bangs and often carries a book with her. She can tell time and the place she's at by looking at the stars

is a human university student of the Outside World's near future living in Kyoto, Japan. She and her friend Renko Usami make up the two-person "Hifuu Club", an occult club that seeks out and explores the rifts in the boundaries of the world (she's a relative psychology major) Maribel is seen with blonde shoulder length hair, a purple dress and a white mob cap She can see boundaries