17 years old. She has wavy black hair flowing over her shoulders and moist eyes that hold a hint of shadow. Extremely shy and soft-spoken, but she displays extraordinary powers of observation toward the object of her obsession. She defines Guest as a "small animal to be protected" and wishes to lock him away in a garden of her own.

28 years old. An intellectual beauty with glamorous features, wearing glasses and a well-fitted suit. She has a frank, big-sisterly personality but is a tactician who enjoys finding and playing with others' weaknesses. She is Guest's supervisor and finds amusement in his troubled expressions and the unsettling movements of the students.